diff --git a/Makefile b/Makefile
index e2a838c..10a356c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 VERSION = 4
 PATCHLEVEL = 9
-SUBLEVEL = 78
+SUBLEVEL = 79
 EXTRAVERSION =
 NAME = Roaring Lionus
 
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 2206e0e..2a35c19 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -1284,7 +1284,7 @@
 		return -EFAULT;
 	}
 
-	if (is_vm_hugetlb_page(vma) && !logging_active) {
+	if (vma_kernel_pagesize(vma) && !logging_active) {
 		hugetlb = true;
 		gfn = (fault_ipa & PMD_MASK) >> PAGE_SHIFT;
 	} else {
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 0ca46ede..9c150cc 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -117,7 +117,7 @@
 archprepare: include/generated/user_constants.h
 
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
-LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
+LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
 
 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
 	$(call cc-option, -fno-stack-protector,) \
diff --git a/arch/x86/entry/vsyscall/vsyscall_64.c b/arch/x86/entry/vsyscall/vsyscall_64.c
index 6bb7e92..0174290 100644
--- a/arch/x86/entry/vsyscall/vsyscall_64.c
+++ b/arch/x86/entry/vsyscall/vsyscall_64.c
@@ -46,6 +46,7 @@
 #else
 	EMULATE;
 #endif
+unsigned long vsyscall_pgprot = __PAGE_KERNEL_VSYSCALL;
 
 static int __init vsyscall_setup(char *str)
 {
@@ -336,11 +337,11 @@
 	extern char __vsyscall_page;
 	unsigned long physaddr_vsyscall = __pa_symbol(&__vsyscall_page);
 
+	if (vsyscall_mode != NATIVE)
+		vsyscall_pgprot = __PAGE_KERNEL_VVAR;
 	if (vsyscall_mode != NONE)
 		__set_fixmap(VSYSCALL_PAGE, physaddr_vsyscall,
-			     vsyscall_mode == NATIVE
-			     ? PAGE_KERNEL_VSYSCALL
-			     : PAGE_KERNEL_VVAR);
+			     __pgprot(vsyscall_pgprot));
 
 	BUILD_BUG_ON((unsigned long)__fix_to_virt(VSYSCALL_PAGE) !=
 		     (unsigned long)VSYSCALL_ADDR);
diff --git a/arch/x86/events/amd/power.c b/arch/x86/events/amd/power.c
index 9842270..21a4e41 100644
--- a/arch/x86/events/amd/power.c
+++ b/arch/x86/events/amd/power.c
@@ -277,7 +277,7 @@
 	int ret;
 
 	if (!x86_match_cpu(cpu_match))
-		return 0;
+		return -ENODEV;
 
 	if (!boot_cpu_has(X86_FEATURE_ACC_POWER))
 		return -ENODEV;
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index e40b19c..353f038 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -596,7 +596,7 @@
 {
 	int tmp;
 
-#ifdef CONFIG_M486
+#ifdef CONFIG_X86_32
 	/*
 	 * Do a CPUID if available, otherwise do a jump.  The jump
 	 * can conveniently enough be the jump around CPUID.
diff --git a/arch/x86/include/asm/vsyscall.h b/arch/x86/include/asm/vsyscall.h
index 4865e10..9ee8506 100644
--- a/arch/x86/include/asm/vsyscall.h
+++ b/arch/x86/include/asm/vsyscall.h
@@ -13,6 +13,7 @@
  */
 extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
 extern bool vsyscall_enabled(void);
+extern unsigned long vsyscall_pgprot;
 #else
 static inline void map_vsyscall(void) {}
 static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index de6626c..be63371 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -934,6 +934,8 @@
 		ci_leaf_init(this_leaf++, &id4_regs);
 		__cache_cpumap_setup(cpu, idx, &id4_regs);
 	}
+	this_cpu_ci->cpu_map_populated = true;
+
 	return 0;
 }
 
diff --git a/arch/x86/kernel/cpu/microcode/intel.c b/arch/x86/kernel/cpu/microcode/intel.c
index ac3e636..f90f176 100644
--- a/arch/x86/kernel/cpu/microcode/intel.c
+++ b/arch/x86/kernel/cpu/microcode/intel.c
@@ -40,6 +40,9 @@
 #include <asm/setup.h>
 #include <asm/msr.h>
 
+/* last level cache size per core */
+static int llc_size_per_core;
+
 /*
  * Temporary microcode blobs pointers storage. We note here during early load
  * the pointers to microcode blobs we've got from whatever storage (detached
@@ -1053,12 +1056,14 @@
 
 	/*
 	 * Late loading on model 79 with microcode revision less than 0x0b000021
-	 * may result in a system hang. This behavior is documented in item
-	 * BDF90, #334165 (Intel Xeon Processor E7-8800/4800 v4 Product Family).
+	 * and LLC size per core bigger than 2.5MB may result in a system hang.
+	 * This behavior is documented in item BDF90, #334165 (Intel Xeon
+	 * Processor E7-8800/4800 v4 Product Family).
 	 */
 	if (c->x86 == 6 &&
 	    c->x86_model == INTEL_FAM6_BROADWELL_X &&
 	    c->x86_mask == 0x01 &&
+	    llc_size_per_core > 2621440 &&
 	    c->microcode < 0x0b000021) {
 		pr_err_once("Erratum BDF90: late loading with revision < 0x0b000021 (0x%x) disabled.\n", c->microcode);
 		pr_err_once("Please consider either early loading through initrd/built-in or a potential BIOS update.\n");
@@ -1125,6 +1130,15 @@
 	.microcode_fini_cpu               = microcode_fini_cpu,
 };
 
+static int __init calc_llc_size_per_core(struct cpuinfo_x86 *c)
+{
+	u64 llc_size = c->x86_cache_size * 1024;
+
+	do_div(llc_size, c->x86_max_cores);
+
+	return (int)llc_size;
+}
+
 struct microcode_ops * __init init_intel_microcode(void)
 {
 	struct cpuinfo_x86 *c = &boot_cpu_data;
@@ -1135,6 +1149,8 @@
 		return NULL;
 	}
 
+	llc_size_per_core = calc_llc_size_per_core(c);
+
 	return &microcode_intel_ops;
 }
 
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c
index 073d1f1..9758524 100644
--- a/arch/x86/lib/delay.c
+++ b/arch/x86/lib/delay.c
@@ -93,6 +93,13 @@
 {
 	u64 start, end, delay, loops = __loops;
 
+	/*
+	 * Timer value of 0 causes MWAITX to wait indefinitely, unless there
+	 * is a store on the memory monitored by MONITORX.
+	 */
+	if (loops == 0)
+		return;
+
 	start = rdtsc_ordered();
 
 	for (;;) {
diff --git a/arch/x86/mm/kaiser.c b/arch/x86/mm/kaiser.c
index a8ade08..ec678aa 100644
--- a/arch/x86/mm/kaiser.c
+++ b/arch/x86/mm/kaiser.c
@@ -344,7 +344,7 @@
 	if (vsyscall_enabled())
 		kaiser_add_user_map_early((void *)VSYSCALL_ADDR,
 					  PAGE_SIZE,
-					   __PAGE_KERNEL_VSYSCALL);
+					  vsyscall_pgprot);
 
 	for_each_possible_cpu(cpu) {
 		void *percpu_vaddr = __per_cpu_user_mapped_start +
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index 15f7436..7840331 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -278,10 +278,10 @@
 	/* if (index >= array->map.max_entries)
 	 *   goto out;
 	 */
-	EMIT4(0x48, 0x8B, 0x46,                   /* mov rax, qword ptr [rsi + 16] */
+	EMIT2(0x89, 0xD2);                        /* mov edx, edx */
+	EMIT3(0x39, 0x56,                         /* cmp dword ptr [rsi + 16], edx */
 	      offsetof(struct bpf_array, map.max_entries));
-	EMIT3(0x48, 0x39, 0xD0);                  /* cmp rax, rdx */
-#define OFFSET1 47 /* number of bytes to jump */
+#define OFFSET1 43 /* number of bytes to jump */
 	EMIT2(X86_JBE, OFFSET1);                  /* jbe out */
 	label1 = cnt;
 
@@ -290,21 +290,20 @@
 	 */
 	EMIT2_off32(0x8B, 0x85, -STACKSIZE + 36); /* mov eax, dword ptr [rbp - 516] */
 	EMIT3(0x83, 0xF8, MAX_TAIL_CALL_CNT);     /* cmp eax, MAX_TAIL_CALL_CNT */
-#define OFFSET2 36
+#define OFFSET2 32
 	EMIT2(X86_JA, OFFSET2);                   /* ja out */
 	label2 = cnt;
 	EMIT3(0x83, 0xC0, 0x01);                  /* add eax, 1 */
 	EMIT2_off32(0x89, 0x85, -STACKSIZE + 36); /* mov dword ptr [rbp - 516], eax */
 
 	/* prog = array->ptrs[index]; */
-	EMIT4_off32(0x48, 0x8D, 0x84, 0xD6,       /* lea rax, [rsi + rdx * 8 + offsetof(...)] */
+	EMIT4_off32(0x48, 0x8B, 0x84, 0xD6,       /* mov rax, [rsi + rdx * 8 + offsetof(...)] */
 		    offsetof(struct bpf_array, ptrs));
-	EMIT3(0x48, 0x8B, 0x00);                  /* mov rax, qword ptr [rax] */
 
 	/* if (prog == NULL)
 	 *   goto out;
 	 */
-	EMIT4(0x48, 0x83, 0xF8, 0x00);            /* cmp rax, 0 */
+	EMIT3(0x48, 0x85, 0xC0);		  /* test rax,rax */
 #define OFFSET3 10
 	EMIT2(X86_JE, OFFSET3);                   /* je out */
 	label3 = cnt;
diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
index 691814d..943702d 100644
--- a/drivers/acpi/acpica/nsutils.c
+++ b/drivers/acpi/acpica/nsutils.c
@@ -594,25 +594,20 @@
 void acpi_ns_terminate(void)
 {
 	acpi_status status;
+	union acpi_operand_object *prev;
+	union acpi_operand_object *next;
 
 	ACPI_FUNCTION_TRACE(ns_terminate);
 
-#ifdef ACPI_EXEC_APP
-	{
-		union acpi_operand_object *prev;
-		union acpi_operand_object *next;
+	/* Delete any module-level code blocks */
 
-		/* Delete any module-level code blocks */
-
-		next = acpi_gbl_module_code_list;
-		while (next) {
-			prev = next;
-			next = next->method.mutex;
-			prev->method.mutex = NULL;	/* Clear the Mutex (cheated) field */
-			acpi_ut_remove_reference(prev);
-		}
+	next = acpi_gbl_module_code_list;
+	while (next) {
+		prev = next;
+		next = next->method.mutex;
+		prev->method.mutex = NULL;	/* Clear the Mutex (cheated) field */
+		acpi_ut_remove_reference(prev);
 	}
-#endif
 
 	/*
 	 * Free the entire namespace -- all nodes and all objects
diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c
index 73c9c7f..f06317d 100644
--- a/drivers/acpi/glue.c
+++ b/drivers/acpi/glue.c
@@ -99,13 +99,13 @@
 		return -ENODEV;
 
 	/*
-	 * If the device has a _HID (or _CID) returning a valid ACPI/PNP
-	 * device ID, it is better to make it look less attractive here, so that
-	 * the other device with the same _ADR value (that may not have a valid
-	 * device ID) can be matched going forward.  [This means a second spec
-	 * violation in a row, so whatever we do here is best effort anyway.]
+	 * If the device has a _HID returning a valid ACPI/PNP device ID, it is
+	 * better to make it look less attractive here, so that the other device
+	 * with the same _ADR value (that may not have a valid device ID) can be
+	 * matched going forward.  [This means a second spec violation in a row,
+	 * so whatever we do here is best effort anyway.]
 	 */
-	return sta_present && list_empty(&adev->pnp.ids) ?
+	return sta_present && !adev->pnp.type.platform_id ?
 			FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
 }
 
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index e9fd32e..70e13cf 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -16,6 +16,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include <linux/acpi.h>
 #include <linux/bitops.h>
 #include <linux/cacheinfo.h>
 #include <linux/compiler.h>
@@ -104,9 +105,16 @@
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 	struct cacheinfo *this_leaf, *sib_leaf;
 	unsigned int index;
-	int ret;
+	int ret = 0;
 
-	ret = cache_setup_of_node(cpu);
+	if (this_cpu_ci->cpu_map_populated)
+		return 0;
+
+	if (of_have_populated_dt())
+		ret = cache_setup_of_node(cpu);
+	else if (!acpi_disabled)
+		/* No cache property/hierarchy support yet in ACPI */
+		ret = -ENOTSUPP;
 	if (ret)
 		return ret;
 
@@ -203,8 +211,7 @@
 	 */
 	ret = cache_shared_cpu_map_setup(cpu);
 	if (ret) {
-		pr_warn("Unable to detect cache hierarchy from DT for CPU %d\n",
-			cpu);
+		pr_warn("Unable to detect cache hierarchy for CPU %d\n", cpu);
 		goto free_ci;
 	}
 	return 0;
diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 7e2dc5e..0b49f29 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -383,6 +383,9 @@
 	if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
 		psmouse_warn(psmouse, "failed to get extended button data, assuming 3 buttons\n");
 		button_info = 0x33;
+	} else if (!button_info) {
+		psmouse_warn(psmouse, "got 0 in extended button data, assuming 3 buttons\n");
+		button_info = 0x33;
 	}
 
 	psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 1644896..b2eeecb 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -4733,6 +4733,15 @@
 
 	be_schedule_worker(adapter);
 
+	/*
+	 * The IF was destroyed and re-created. We need to clear
+	 * all promiscuous flags valid for the destroyed IF.
+	 * Without this promisc mode is not restored during
+	 * be_open() because the driver thinks that it is
+	 * already enabled in HW.
+	 */
+	adapter->if_flags &= ~BE_IF_FLAGS_ALL_PROMISCUOUS;
+
 	if (netif_running(netdev))
 		status = be_open(netdev);
 
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 8aa91dd..1655601 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -765,11 +765,8 @@
 	dipn = htonl(dip);
 	dev = mlxsw_sp->rifs[rif]->dev;
 	n = neigh_lookup(&arp_tbl, &dipn, dev);
-	if (!n) {
-		netdev_err(dev, "Failed to find matching neighbour for IP=%pI4h\n",
-			   &dip);
+	if (!n)
 		return;
-	}
 
 	netdev_dbg(dev, "Updating neighbour with IP=%pI4h\n", &dip);
 	neigh_event_send(n, NULL);
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 2c4350a..298b74e 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -2222,19 +2222,14 @@
 	void __iomem *ioaddr = tp->mmio_addr;
 	dma_addr_t paddr = tp->counters_phys_addr;
 	u32 cmd;
-	bool ret;
 
 	RTL_W32(CounterAddrHigh, (u64)paddr >> 32);
+	RTL_R32(CounterAddrHigh);
 	cmd = (u64)paddr & DMA_BIT_MASK(32);
 	RTL_W32(CounterAddrLow, cmd);
 	RTL_W32(CounterAddrLow, cmd | counter_cmd);
 
-	ret = rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
-
-	RTL_W32(CounterAddrLow, 0);
-	RTL_W32(CounterAddrHigh, 0);
-
-	return ret;
+	return rtl_udelay_loop_wait_low(tp, &rtl_counters_cond, 10, 1000);
 }
 
 static bool rtl8169_reset_counters(struct net_device *dev)
diff --git a/drivers/net/ppp/ppp_generic.c b/drivers/net/ppp/ppp_generic.c
index b883af9..fc4c2cc 100644
--- a/drivers/net/ppp/ppp_generic.c
+++ b/drivers/net/ppp/ppp_generic.c
@@ -1002,17 +1002,18 @@
 	if (!ifname_is_set)
 		snprintf(ppp->dev->name, IFNAMSIZ, "ppp%i", ppp->file.index);
 
+	mutex_unlock(&pn->all_ppp_mutex);
+
 	ret = register_netdevice(ppp->dev);
 	if (ret < 0)
 		goto err_unit;
 
 	atomic_inc(&ppp_unit_count);
 
-	mutex_unlock(&pn->all_ppp_mutex);
-
 	return 0;
 
 err_unit:
+	mutex_lock(&pn->all_ppp_mutex);
 	unit_put(&pn->units_idr, ppp->file.index);
 err:
 	mutex_unlock(&pn->all_ppp_mutex);
diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
index 4ddae81..dc36c2e 100644
--- a/drivers/net/ppp/pppoe.c
+++ b/drivers/net/ppp/pppoe.c
@@ -842,6 +842,7 @@
 	struct pppoe_hdr *ph;
 	struct net_device *dev;
 	char *start;
+	int hlen;
 
 	lock_sock(sk);
 	if (sock_flag(sk, SOCK_DEAD) || !(sk->sk_state & PPPOX_CONNECTED)) {
@@ -860,16 +861,16 @@
 	if (total_len > (dev->mtu + dev->hard_header_len))
 		goto end;
 
-
-	skb = sock_wmalloc(sk, total_len + dev->hard_header_len + 32,
-			   0, GFP_KERNEL);
+	hlen = LL_RESERVED_SPACE(dev);
+	skb = sock_wmalloc(sk, hlen + sizeof(*ph) + total_len +
+			   dev->needed_tailroom, 0, GFP_KERNEL);
 	if (!skb) {
 		error = -ENOMEM;
 		goto end;
 	}
 
 	/* Reserve space for headers. */
-	skb_reserve(skb, dev->hard_header_len);
+	skb_reserve(skb, hlen);
 	skb_reset_network_header(skb);
 
 	skb->dev = dev;
@@ -930,7 +931,7 @@
 	/* Copy the data if there is no space for the header or if it's
 	 * read-only.
 	 */
-	if (skb_cow_head(skb, sizeof(*ph) + dev->hard_header_len))
+	if (skb_cow_head(skb, LL_RESERVED_SPACE(dev) + sizeof(*ph)))
 		goto abort;
 
 	__skb_push(skb, sizeof(*ph));
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 0539869..5f51668 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -525,6 +525,14 @@
 	skb_queue_purge(&tfile->sk.sk_error_queue);
 }
 
+static void tun_cleanup_tx_array(struct tun_file *tfile)
+{
+	if (tfile->tx_array.ring.queue) {
+		skb_array_cleanup(&tfile->tx_array);
+		memset(&tfile->tx_array, 0, sizeof(tfile->tx_array));
+	}
+}
+
 static void __tun_detach(struct tun_file *tfile, bool clean)
 {
 	struct tun_file *ntfile;
@@ -566,8 +574,7 @@
 			    tun->dev->reg_state == NETREG_REGISTERED)
 				unregister_netdevice(tun->dev);
 		}
-		if (tun)
-			skb_array_cleanup(&tfile->tx_array);
+		tun_cleanup_tx_array(tfile);
 		sock_put(&tfile->sk);
 	}
 }
@@ -606,11 +613,13 @@
 		/* Drop read queue */
 		tun_queue_purge(tfile);
 		sock_put(&tfile->sk);
+		tun_cleanup_tx_array(tfile);
 	}
 	list_for_each_entry_safe(tfile, tmp, &tun->disabled, next) {
 		tun_enable_queue(tfile);
 		tun_queue_purge(tfile);
 		sock_put(&tfile->sk);
+		tun_cleanup_tx_array(tfile);
 	}
 	BUG_ON(tun->numdisabled != 0);
 
@@ -2369,6 +2378,8 @@
 
 	sock_set_flag(&tfile->sk, SOCK_ZEROCOPY);
 
+	memset(&tfile->tx_array, 0, sizeof(tfile->tx_array));
+
 	return 0;
 }
 
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 9c257ff..c53385a 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2197,6 +2197,7 @@
 		buf = DEFAULT_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 		dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE;
 		dev->rx_qlen = 4;
+		dev->tx_qlen = 4;
 	}
 
 	ret = lan78xx_write_reg(dev, BURST_CAP, buf);
diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index ef83ae3..4afba17 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -1616,7 +1616,6 @@
 					  rq->rx_ring[i].basePA);
 			rq->rx_ring[i].base = NULL;
 		}
-		rq->buf_info[i] = NULL;
 	}
 
 	if (rq->data_ring.base) {
@@ -1638,6 +1637,7 @@
 			(rq->rx_ring[0].size + rq->rx_ring[1].size);
 		dma_free_coherent(&adapter->pdev->dev, sz, rq->buf_info[0],
 				  rq->buf_info_pa);
+		rq->buf_info[0] = rq->buf_info[1] = NULL;
 	}
 }
 
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index a530f08..4abd3fc 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1727,7 +1727,7 @@
 
 	if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
 		reason = FAILURE_SESSION_IN_RECOVERY;
-		sc->result = DID_REQUEUE;
+		sc->result = DID_REQUEUE << 16;
 		goto fault;
 	}
 
diff --git a/drivers/usb/usbip/usbip_common.h b/drivers/usb/usbip/usbip_common.h
index 9f49037..f0b955f 100644
--- a/drivers/usb/usbip/usbip_common.h
+++ b/drivers/usb/usbip/usbip_common.h
@@ -271,6 +271,7 @@
 	/* lock for status */
 	spinlock_t lock;
 
+	int sockfd;
 	struct socket *tcp_socket;
 
 	struct task_struct *tcp_rx;
diff --git a/drivers/usb/usbip/vhci_sysfs.c b/drivers/usb/usbip/vhci_sysfs.c
index b96e5b1..c287ccc 100644
--- a/drivers/usb/usbip/vhci_sysfs.c
+++ b/drivers/usb/usbip/vhci_sysfs.c
@@ -49,13 +49,17 @@
 
 	/*
 	 * output example:
-	 * port sta spd dev      socket           local_busid
-	 * 0000 004 000 00000000         c5a7bb80 1-2.3
-	 * 0001 004 000 00000000         d8cee980 2-3.4
+	 * port sta spd dev      sockfd local_busid
+	 * 0000 004 000 00000000 000003 1-2.3
+	 * 0001 004 000 00000000 000004 2-3.4
 	 *
-	 * IP address can be retrieved from a socket pointer address by looking
-	 * up /proc/net/{tcp,tcp6}. Also, a userland program may remember a
-	 * port number and its peer IP address.
+	 * Output includes socket fd instead of socket pointer address to
+	 * avoid leaking kernel memory address in:
+	 *	/sys/devices/platform/vhci_hcd.0/status and in debug output.
+	 * The socket pointer address is not used at the moment and it was
+	 * made visible as a convenient way to find IP address from socket
+	 * pointer address by looking up /proc/net/{tcp,tcp6}. As this opens
+	 * a security hole, the change is made to use sockfd instead.
 	 */
 	for (i = 0; i < VHCI_HC_PORTS; i++) {
 		struct vhci_device *vdev = &vhci->vdev[i];
@@ -68,13 +72,13 @@
 		if (vdev->ud.status == VDEV_ST_USED) {
 			out += sprintf(out, "%03u %08x ",
 					    vdev->speed, vdev->devid);
-			out += sprintf(out, "%16p %s",
-					    vdev->ud.tcp_socket,
+			out += sprintf(out, "%06u %s",
+					    vdev->ud.sockfd,
 					    dev_name(&vdev->udev->dev));
 
 		} else {
 			out += sprintf(out, "000 00000000 ");
-			out += sprintf(out, "0000000000000000 0-0");
+			out += sprintf(out, "000000 0-0");
 		}
 
 		out += sprintf(out, "\n");
@@ -125,7 +129,7 @@
 	int pdev_nr;
 
 	out += sprintf(out,
-		       "port sta spd dev      socket           local_busid\n");
+		       "port sta spd dev      sockfd local_busid\n");
 
 	pdev_nr = status_name_to_id(attr->attr.name);
 	if (pdev_nr < 0)
@@ -324,6 +328,7 @@
 
 	vdev->devid         = devid;
 	vdev->speed         = speed;
+	vdev->ud.sockfd     = sockfd;
 	vdev->ud.tcp_socket = socket;
 	vdev->ud.status     = VDEV_ST_NOTASSIGNED;
 
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 1493ceb..ec03cf6 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -114,6 +114,10 @@
 	int who = arg;
 	type = PIDTYPE_PID;
 	if (who < 0) {
+		/* avoid overflow below */
+		if (who == INT_MIN)
+			return;
+
 		type = PIDTYPE_PGID;
 		who = -who;
 	}
diff --git a/fs/nfsd/auth.c b/fs/nfsd/auth.c
index 75f942a..81c018e 100644
--- a/fs/nfsd/auth.c
+++ b/fs/nfsd/auth.c
@@ -59,10 +59,10 @@
 				gi->gid[i] = exp->ex_anon_gid;
 			else
 				gi->gid[i] = rqgi->gid[i];
-
-			/* Each thread allocates its own gi, no race */
-			groups_sort(gi);
 		}
+
+		/* Each thread allocates its own gi, no race */
+		groups_sort(gi);
 	} else {
 		gi = get_group_info(rqgi);
 	}
diff --git a/fs/orangefs/devorangefs-req.c b/fs/orangefs/devorangefs-req.c
index fe2cbeb..939aa06 100644
--- a/fs/orangefs/devorangefs-req.c
+++ b/fs/orangefs/devorangefs-req.c
@@ -161,7 +161,7 @@
 	struct orangefs_kernel_op_s *op, *temp;
 	__s32 proto_ver = ORANGEFS_KERNEL_PROTO_VERSION;
 	static __s32 magic = ORANGEFS_DEVREQ_MAGIC;
-	struct orangefs_kernel_op_s *cur_op = NULL;
+	struct orangefs_kernel_op_s *cur_op;
 	unsigned long ret;
 
 	/* We do not support blocking IO. */
@@ -181,6 +181,7 @@
 	}
 
 restart:
+	cur_op = NULL;
 	/* Get next op (if any) from top of list. */
 	spin_lock(&orangefs_request_list_lock);
 	list_for_each_entry_safe(op, temp, &orangefs_request_list, list) {
diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
index 02cc613..5b2cbe5 100644
--- a/fs/orangefs/file.c
+++ b/fs/orangefs/file.c
@@ -446,7 +446,7 @@
 static ssize_t orangefs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 {
 	struct file *file = iocb->ki_filp;
-	loff_t pos = *(&iocb->ki_pos);
+	loff_t pos = iocb->ki_pos;
 	ssize_t rc = 0;
 
 	BUG_ON(iocb->private);
@@ -485,9 +485,6 @@
 		}
 	}
 
-	if (file->f_pos > i_size_read(file->f_mapping->host))
-		orangefs_i_size_write(file->f_mapping->host, file->f_pos);
-
 	rc = generic_write_checks(iocb, iter);
 
 	if (rc <= 0) {
@@ -501,7 +498,7 @@
 	 * pos to the end of the file, so we will wait till now to set
 	 * pos...
 	 */
-	pos = *(&iocb->ki_pos);
+	pos = iocb->ki_pos;
 
 	rc = do_readv_writev(ORANGEFS_IO_WRITE,
 			     file,
diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index 45dd8f2..f28381a 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -570,17 +570,6 @@
 	sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;			\
 } while (0)
 
-static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
-{
-#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
-	inode_lock(inode);
-#endif
-	i_size_write(inode, i_size);
-#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
-	inode_unlock(inode);
-#endif
-}
-
 static inline void orangefs_set_timeout(struct dentry *dentry)
 {
 	unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
diff --git a/fs/orangefs/waitqueue.c b/fs/orangefs/waitqueue.c
index abcfa3f..f61b008 100644
--- a/fs/orangefs/waitqueue.c
+++ b/fs/orangefs/waitqueue.c
@@ -28,10 +28,10 @@
  */
 void purge_waiting_ops(void)
 {
-	struct orangefs_kernel_op_s *op;
+	struct orangefs_kernel_op_s *op, *tmp;
 
 	spin_lock(&orangefs_request_list_lock);
-	list_for_each_entry(op, &orangefs_request_list, list) {
+	list_for_each_entry_safe(op, tmp, &orangefs_request_list, list) {
 		gossip_debug(GOSSIP_WAIT_DEBUG,
 			     "pvfs2-client-core: purging op tag %llu %s\n",
 			     llu(op->tag),
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index dc198bc..edc8ef7 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -513,9 +513,17 @@
 			       "inode has negative prealloc blocks count.");
 #endif
 	while (ei->i_prealloc_count > 0) {
-		reiserfs_free_prealloc_block(th, inode, ei->i_prealloc_block);
-		ei->i_prealloc_block++;
+		b_blocknr_t block_to_free;
+
+		/*
+		 * reiserfs_free_prealloc_block can drop the write lock,
+		 * which could allow another caller to free the same block.
+		 * We can protect against it by modifying the prealloc
+		 * state before calling it.
+		 */
+		block_to_free = ei->i_prealloc_block++;
 		ei->i_prealloc_count--;
+		reiserfs_free_prealloc_block(th, inode, block_to_free);
 		dirty = 1;
 	}
 	if (dirty)
@@ -1128,7 +1136,7 @@
 	hint->prealloc_size = 0;
 
 	if (!hint->formatted_node && hint->preallocate) {
-		if (S_ISREG(hint->inode->i_mode)
+		if (S_ISREG(hint->inode->i_mode) && !IS_PRIVATE(hint->inode)
 		    && hint->inode->i_size >=
 		    REISERFS_SB(hint->th->t_super)->s_alloc_options.
 		    preallocmin * hint->inode->i_sb->s_blocksize)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index bc3450b..193c40e 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -36,7 +36,10 @@
 };
 
 struct bpf_map {
-	atomic_t refcnt;
+	/* 1st cacheline with read-mostly members of which some
+	 * are also accessed in fast-path (e.g. ops, max_entries).
+	 */
+	const struct bpf_map_ops *ops ____cacheline_aligned;
 	enum bpf_map_type map_type;
 	u32 key_size;
 	u32 value_size;
@@ -44,10 +47,15 @@
 	u32 map_flags;
 	u32 pages;
 	bool unpriv_array;
-	struct user_struct *user;
-	const struct bpf_map_ops *ops;
-	struct work_struct work;
+	/* 7 bytes hole */
+
+	/* 2nd cacheline with misc members to avoid false sharing
+	 * particularly with refcounting.
+	 */
+	struct user_struct *user ____cacheline_aligned;
+	atomic_t refcnt;
 	atomic_t usercnt;
+	struct work_struct work;
 #ifdef CONFIG_SECURITY
 	void *security;
 #endif
diff --git a/include/linux/cacheinfo.h b/include/linux/cacheinfo.h
index 2189935..a951fd1 100644
--- a/include/linux/cacheinfo.h
+++ b/include/linux/cacheinfo.h
@@ -71,6 +71,7 @@
 	struct cacheinfo *info_list;
 	unsigned int num_levels;
 	unsigned int num_leaves;
+	bool cpu_map_populated;
 };
 
 /*
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 490f5a8..e3d7754 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -633,6 +633,8 @@
 	int kswapd_order;
 	enum zone_type kswapd_classzone_idx;
 
+	int kswapd_failures;		/* Number of 'reclaimed == 0' runs */
+
 #ifdef CONFIG_COMPACTION
 	int kcompactd_max_order;
 	enum zone_type kcompactd_classzone_idx;
diff --git a/include/linux/vermagic.h b/include/linux/vermagic.h
index a3d0493..6f8fbcf 100644
--- a/include/linux/vermagic.h
+++ b/include/linux/vermagic.h
@@ -24,16 +24,10 @@
 #ifndef MODULE_ARCH_VERMAGIC
 #define MODULE_ARCH_VERMAGIC ""
 #endif
-#ifdef RETPOLINE
-#define MODULE_VERMAGIC_RETPOLINE "retpoline "
-#else
-#define MODULE_VERMAGIC_RETPOLINE ""
-#endif
 
 #define VERMAGIC_STRING 						\
 	UTS_RELEASE " "							\
 	MODULE_VERMAGIC_SMP MODULE_VERMAGIC_PREEMPT 			\
 	MODULE_VERMAGIC_MODULE_UNLOAD MODULE_VERMAGIC_MODVERSIONS	\
-	MODULE_ARCH_VERMAGIC						\
-	MODULE_VERMAGIC_RETPOLINE
+	MODULE_ARCH_VERMAGIC
 
diff --git a/include/net/arp.h b/include/net/arp.h
index 5e0f891..1b3f869 100644
--- a/include/net/arp.h
+++ b/include/net/arp.h
@@ -19,6 +19,9 @@
 
 static inline struct neighbour *__ipv4_neigh_lookup_noref(struct net_device *dev, u32 key)
 {
+	if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
+		key = INADDR_ANY;
+
 	return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, arp_hashfn, &key, dev);
 }
 
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 615ce0a..e64210c 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -290,6 +290,7 @@
 			   int flags);
 int ip6_flowlabel_init(void);
 void ip6_flowlabel_cleanup(void);
+bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np);
 
 static inline void fl6_sock_release(struct ip6_flowlabel *fl)
 {
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index 0940598..23102da 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -213,6 +213,11 @@
 	return net1 == net2;
 }
 
+static inline int check_net(const struct net *net)
+{
+	return atomic_read(&net->count) != 0;
+}
+
 void net_drop_ns(void *);
 
 #else
@@ -237,6 +242,11 @@
 	return 1;
 }
 
+static inline int check_net(const struct net *net)
+{
+	return 1;
+}
+
 #define net_drop_ns NULL
 #endif
 
diff --git a/init/Kconfig b/init/Kconfig
index 3bb5824..544d791 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1748,6 +1748,13 @@
 	  Enable the bpf() system call that allows to manipulate eBPF
 	  programs and maps via file descriptors.
 
+config BPF_JIT_ALWAYS_ON
+	bool "Permanently enable BPF JIT and remove BPF interpreter"
+	depends on BPF_SYSCALL && HAVE_EBPF_JIT && BPF_JIT
+	help
+	  Enables BPF JIT and removes BPF interpreter to avoid
+	  speculative execution of BPF instructions by the interpreter
+
 config SHMEM
 	bool "Use full shmem filesystem" if EXPERT
 	default y
diff --git a/ipc/msg.c b/ipc/msg.c
index e12307d..ff10d43 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -763,7 +763,10 @@
 	if (*msgtyp == 0)
 		return SEARCH_ANY;
 	if (*msgtyp < 0) {
-		*msgtyp = -*msgtyp;
+		if (*msgtyp == LONG_MIN) /* -LONG_MIN is undefined */
+			*msgtyp = LONG_MAX;
+		else
+			*msgtyp = -*msgtyp;
 		return SEARCH_LESSEQUAL;
 	}
 	if (msgflg & MSG_EXCEPT)
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index aa6d981..879ca84 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -458,6 +458,7 @@
 }
 EXPORT_SYMBOL_GPL(__bpf_call_base);
 
+#ifndef CONFIG_BPF_JIT_ALWAYS_ON
 /**
  *	__bpf_prog_run - run eBPF program on a given context
  *	@ctx: is the data we are operating on
@@ -641,7 +642,7 @@
 		DST = tmp;
 		CONT;
 	ALU_MOD_X:
-		if (unlikely(SRC == 0))
+		if (unlikely((u32)SRC == 0))
 			return 0;
 		tmp = (u32) DST;
 		DST = do_div(tmp, (u32) SRC);
@@ -660,7 +661,7 @@
 		DST = div64_u64(DST, SRC);
 		CONT;
 	ALU_DIV_X:
-		if (unlikely(SRC == 0))
+		if (unlikely((u32)SRC == 0))
 			return 0;
 		tmp = (u32) DST;
 		do_div(tmp, (u32) SRC);
@@ -715,7 +716,7 @@
 		struct bpf_map *map = (struct bpf_map *) (unsigned long) BPF_R2;
 		struct bpf_array *array = container_of(map, struct bpf_array, map);
 		struct bpf_prog *prog;
-		u64 index = BPF_R3;
+		u32 index = BPF_R3;
 
 		if (unlikely(index >= array->map.max_entries))
 			goto out;
@@ -923,6 +924,13 @@
 }
 STACK_FRAME_NON_STANDARD(__bpf_prog_run); /* jump table */
 
+#else
+static unsigned int __bpf_prog_ret0(void *ctx, const struct bpf_insn *insn)
+{
+	return 0;
+}
+#endif
+
 bool bpf_prog_array_compatible(struct bpf_array *array,
 			       const struct bpf_prog *fp)
 {
@@ -970,7 +978,11 @@
  */
 struct bpf_prog *bpf_prog_select_runtime(struct bpf_prog *fp, int *err)
 {
+#ifndef CONFIG_BPF_JIT_ALWAYS_ON
 	fp->bpf_func = (void *) __bpf_prog_run;
+#else
+	fp->bpf_func = (void *) __bpf_prog_ret0;
+#endif
 
 	/* eBPF JITs can rewrite the program in case constant
 	 * blinding is active. However, in case of error during
@@ -979,6 +991,12 @@
 	 * be JITed, but falls back to the interpreter.
 	 */
 	fp = bpf_int_jit_compile(fp);
+#ifdef CONFIG_BPF_JIT_ALWAYS_ON
+	if (!fp->jited) {
+		*err = -ENOTSUPP;
+		return fp;
+	}
+#endif
 	bpf_prog_lock_ro(fp);
 
 	/* The tail call compatibility check can only be done at
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 19c44cf..076e4a0 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -702,6 +702,13 @@
 	return __is_pointer_value(env->allow_ptr_leaks, &env->cur_state.regs[regno]);
 }
 
+static bool is_ctx_reg(struct bpf_verifier_env *env, int regno)
+{
+	const struct bpf_reg_state *reg = &env->cur_state.regs[regno];
+
+	return reg->type == PTR_TO_CTX;
+}
+
 static int check_ptr_alignment(struct bpf_verifier_env *env,
 			       struct bpf_reg_state *reg, int off, int size)
 {
@@ -896,6 +903,12 @@
 		return -EACCES;
 	}
 
+	if (is_ctx_reg(env, insn->dst_reg)) {
+		verbose("BPF_XADD stores into R%d context is not allowed\n",
+			insn->dst_reg);
+		return -EACCES;
+	}
+
 	/* check whether atomic_add can read the memory */
 	err = check_mem_access(env, insn->dst_reg, insn->off,
 			       BPF_SIZE(insn->code), BPF_READ, -1);
@@ -1843,6 +1856,11 @@
 			return -EINVAL;
 		}
 
+		if (opcode == BPF_ARSH && BPF_CLASS(insn->code) != BPF_ALU64) {
+			verbose("BPF_ARSH not supported for 32 bit ALU\n");
+			return -EINVAL;
+		}
+
 		if ((opcode == BPF_LSH || opcode == BPF_RSH ||
 		     opcode == BPF_ARSH) && BPF_SRC(insn->code) == BPF_K) {
 			int size = BPF_CLASS(insn->code) == BPF_ALU64 ? 64 : 32;
@@ -3007,6 +3025,12 @@
 			if (err)
 				return err;
 
+			if (is_ctx_reg(env, insn->dst_reg)) {
+				verbose("BPF_ST stores into R%d context is not allowed\n",
+					insn->dst_reg);
+				return -EACCES;
+			}
+
 			/* check that memory (dst_reg + off) is writeable */
 			err = check_mem_access(env, insn->dst_reg, insn->off,
 					       BPF_SIZE(insn->code), BPF_WRITE,
@@ -3386,6 +3410,24 @@
 
 
 	for (i = 0; i < insn_cnt; i++, insn++) {
+		if (insn->code == (BPF_ALU | BPF_MOD | BPF_X) ||
+		    insn->code == (BPF_ALU | BPF_DIV | BPF_X)) {
+			/* due to JIT bugs clear upper 32-bits of src register
+			 * before div/mod operation
+			 */
+			insn_buf[0] = BPF_MOV32_REG(insn->src_reg, insn->src_reg);
+			insn_buf[1] = *insn;
+			cnt = 2;
+			new_prog = bpf_patch_insn_data(env, i + delta, insn_buf, cnt);
+			if (!new_prog)
+				return -ENOMEM;
+
+			delta    += cnt - 1;
+			env->prog = prog = new_prog;
+			insn      = new_prog->insnsi + i + delta;
+			continue;
+		}
+
 		if (insn->code != (BPF_JMP | BPF_CALL))
 			continue;
 
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index eeb7f2f..54fd2fe 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -652,7 +652,9 @@
 static inline void hrtimer_init_hres(struct hrtimer_cpu_base *base)
 {
 	base->expires_next.tv64 = KTIME_MAX;
+	base->hang_detected = 0;
 	base->hres_active = 0;
+	base->next_timer = NULL;
 }
 
 /*
@@ -1610,6 +1612,7 @@
 		timerqueue_init_head(&cpu_base->clock_base[i].active);
 	}
 
+	cpu_base->active_bases = 0;
 	cpu_base->cpu = cpu;
 	hrtimer_init_hres(cpu_base);
 	return 0;
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 2e38502..98da752 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -5646,9 +5646,8 @@
 				return NULL;
 			}
 		}
-		/* We don't expect to fail. */
 		if (*err) {
-			pr_cont("FAIL to attach err=%d len=%d\n",
+			pr_cont("FAIL to prog_create err=%d len=%d\n",
 				*err, fprog.len);
 			return NULL;
 		}
@@ -5671,6 +5670,10 @@
 		 * checks.
 		 */
 		fp = bpf_prog_select_runtime(fp, err);
+		if (*err) {
+			pr_cont("FAIL to select_runtime err=%d\n", *err);
+			return NULL;
+		}
 		break;
 	}
 
@@ -5856,8 +5859,8 @@
 				pass_cnt++;
 				continue;
 			}
-
-			return err;
+			err_cnt++;
+			continue;
 		}
 
 		pr_cont("jited:%u ", fp->jited);
diff --git a/mm/cma.c b/mm/cma.c
index c960459..397687f 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -54,7 +54,7 @@
 }
 
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
-					     int align_order)
+					     unsigned int align_order)
 {
 	if (align_order <= cma->order_per_bit)
 		return 0;
@@ -62,17 +62,14 @@
 }
 
 /*
- * Find a PFN aligned to the specified order and return an offset represented in
- * order_per_bits.
+ * Find the offset of the base PFN from the specified align_order.
+ * The value returned is represented in order_per_bits.
  */
 static unsigned long cma_bitmap_aligned_offset(const struct cma *cma,
-					       int align_order)
+					       unsigned int align_order)
 {
-	if (align_order <= cma->order_per_bit)
-		return 0;
-
-	return (ALIGN(cma->base_pfn, (1UL << align_order))
-		- cma->base_pfn) >> cma->order_per_bit;
+	return (cma->base_pfn & ((1UL << align_order) - 1))
+		>> cma->order_per_bit;
 }
 
 static unsigned long cma_bitmap_pages_to_bits(const struct cma *cma,
diff --git a/mm/internal.h b/mm/internal.h
index 34a5459..3e2d016 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -74,6 +74,12 @@
 extern unsigned long highest_memmap_pfn;
 
 /*
+ * Maximum number of reclaim retries without progress before the OOM
+ * killer is consider the only way forward.
+ */
+#define MAX_RECLAIM_RETRIES 16
+
+/*
  * in mm/vmscan.c:
  */
 extern int isolate_lru_page(struct page *page);
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 2a800c4..5008815 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5531,7 +5531,7 @@
 		next = page->lru.next;
 
 		VM_BUG_ON_PAGE(PageLRU(page), page);
-		VM_BUG_ON_PAGE(page_count(page), page);
+		VM_BUG_ON_PAGE(!PageHWPoison(page) && page_count(page), page);
 
 		if (!page->mem_cgroup)
 			continue;
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index ce7d416..5aa71a8 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -535,6 +535,13 @@
 		 */
 		ClearPageActive(p);
 		ClearPageUnevictable(p);
+
+		/*
+		 * Poisoned page might never drop its ref count to 0 so we have
+		 * to uncharge it manually from its memcg.
+		 */
+		mem_cgroup_uncharge(p);
+
 		/*
 		 * drop the page count elevated by isolate_lru_page()
 		 */
diff --git a/mm/mmap.c b/mm/mmap.c
index 11f63f1..4b412e2 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2249,7 +2249,8 @@
 		gap_addr = TASK_SIZE;
 
 	next = vma->vm_next;
-	if (next && next->vm_start < gap_addr) {
+	if (next && next->vm_start < gap_addr &&
+			(next->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) {
 		if (!(next->vm_flags & VM_GROWSUP))
 			return -ENOMEM;
 		/* Check that both stack segments have the same anon_vma? */
@@ -2333,7 +2334,8 @@
 	if (gap_addr > address)
 		return -ENOMEM;
 	prev = vma->vm_prev;
-	if (prev && prev->vm_end > gap_addr) {
+	if (prev && prev->vm_end > gap_addr &&
+			(prev->vm_flags & (VM_WRITE|VM_READ|VM_EXEC))) {
 		if (!(prev->vm_flags & VM_GROWSDOWN))
 			return -ENOMEM;
 		/* Check that both stack segments have the same anon_vma? */
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index fbc3888..94018ea 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2821,9 +2821,6 @@
 		if (!area->nr_free)
 			continue;
 
-		if (alloc_harder)
-			return true;
-
 		for (mt = 0; mt < MIGRATE_PCPTYPES; mt++) {
 			if (!list_empty(&area->free_list[mt]))
 				return true;
@@ -2835,6 +2832,9 @@
 			return true;
 		}
 #endif
+		if (alloc_harder &&
+			!list_empty(&area->free_list[MIGRATE_HIGHATOMIC]))
+			return true;
 	}
 	return false;
 }
@@ -3422,12 +3422,6 @@
 }
 
 /*
- * Maximum number of reclaim retries without any progress before OOM killer
- * is consider as the only way to move forward.
- */
-#define MAX_RECLAIM_RETRIES 16
-
-/*
  * Checks whether it makes sense to retry the reclaim to make a forward progress
  * for the given allocation request.
  * The reclaim feedback represented by did_some_progress (any progress during
@@ -4385,7 +4379,8 @@
 			K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
 			K(node_page_state(pgdat, NR_UNSTABLE_NFS)),
 			node_page_state(pgdat, NR_PAGES_SCANNED),
-			!pgdat_reclaimable(pgdat) ? "yes" : "no");
+			pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES ?
+				"yes" : "no");
 	}
 
 	for_each_populated_zone(zone) {
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 30a88b9..f118dc2 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2606,6 +2606,15 @@
 	} while (should_continue_reclaim(pgdat, sc->nr_reclaimed - nr_reclaimed,
 					 sc->nr_scanned - nr_scanned, sc));
 
+	/*
+	 * Kswapd gives up on balancing particular nodes after too
+	 * many failures to reclaim anything from them and goes to
+	 * sleep. On reclaim progress, reset the failure counter. A
+	 * successful direct reclaim run will revive a dormant kswapd.
+	 */
+	if (reclaimable)
+		pgdat->kswapd_failures = 0;
+
 	return reclaimable;
 }
 
@@ -2680,10 +2689,6 @@
 						 GFP_KERNEL | __GFP_HARDWALL))
 				continue;
 
-			if (sc->priority != DEF_PRIORITY &&
-			    !pgdat_reclaimable(zone->zone_pgdat))
-				continue;	/* Let kswapd poll it */
-
 			/*
 			 * If we already have plenty of memory free for
 			 * compaction in this zone, don't free any more.
@@ -2820,7 +2825,7 @@
 	return 0;
 }
 
-static bool pfmemalloc_watermark_ok(pg_data_t *pgdat)
+static bool allow_direct_reclaim(pg_data_t *pgdat)
 {
 	struct zone *zone;
 	unsigned long pfmemalloc_reserve = 0;
@@ -2828,6 +2833,9 @@
 	int i;
 	bool wmark_ok;
 
+	if (pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES)
+		return true;
+
 	for (i = 0; i <= ZONE_NORMAL; i++) {
 		zone = &pgdat->node_zones[i];
 		if (!managed_zone(zone) ||
@@ -2908,7 +2916,7 @@
 
 		/* Throttle based on the first usable node */
 		pgdat = zone->zone_pgdat;
-		if (pfmemalloc_watermark_ok(pgdat))
+		if (allow_direct_reclaim(pgdat))
 			goto out;
 		break;
 	}
@@ -2930,14 +2938,14 @@
 	 */
 	if (!(gfp_mask & __GFP_FS)) {
 		wait_event_interruptible_timeout(pgdat->pfmemalloc_wait,
-			pfmemalloc_watermark_ok(pgdat), HZ);
+			allow_direct_reclaim(pgdat), HZ);
 
 		goto check_pending;
 	}
 
 	/* Throttle until kswapd wakes the process */
 	wait_event_killable(zone->zone_pgdat->pfmemalloc_wait,
-		pfmemalloc_watermark_ok(pgdat));
+		allow_direct_reclaim(pgdat));
 
 check_pending:
 	if (fatal_signal_pending(current))
@@ -3116,7 +3124,7 @@
 
 	/*
 	 * The throttled processes are normally woken up in balance_pgdat() as
-	 * soon as pfmemalloc_watermark_ok() is true. But there is a potential
+	 * soon as allow_direct_reclaim() is true. But there is a potential
 	 * race between when kswapd checks the watermarks and a process gets
 	 * throttled. There is also a potential race if processes get
 	 * throttled, kswapd wakes, a large process exits thereby balancing the
@@ -3130,6 +3138,10 @@
 	if (waitqueue_active(&pgdat->pfmemalloc_wait))
 		wake_up_all(&pgdat->pfmemalloc_wait);
 
+	/* Hopeless node, leave it to direct reclaim */
+	if (pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES)
+		return true;
+
 	for (i = 0; i <= classzone_idx; i++) {
 		struct zone *zone = pgdat->node_zones + i;
 
@@ -3216,9 +3228,9 @@
 	count_vm_event(PAGEOUTRUN);
 
 	do {
+		unsigned long nr_reclaimed = sc.nr_reclaimed;
 		bool raise_priority = true;
 
-		sc.nr_reclaimed = 0;
 		sc.reclaim_idx = classzone_idx;
 
 		/*
@@ -3297,7 +3309,7 @@
 		 * able to safely make forward progress. Wake them
 		 */
 		if (waitqueue_active(&pgdat->pfmemalloc_wait) &&
-				pfmemalloc_watermark_ok(pgdat))
+				allow_direct_reclaim(pgdat))
 			wake_up_all(&pgdat->pfmemalloc_wait);
 
 		/* Check if kswapd should be suspending */
@@ -3308,10 +3320,14 @@
 		 * Raise priority if scanning rate is too low or there was no
 		 * progress in reclaiming pages
 		 */
-		if (raise_priority || !sc.nr_reclaimed)
+		nr_reclaimed = sc.nr_reclaimed - nr_reclaimed;
+		if (raise_priority || !nr_reclaimed)
 			sc.priority--;
 	} while (sc.priority >= 1);
 
+	if (!sc.nr_reclaimed)
+		pgdat->kswapd_failures++;
+
 out:
 	/*
 	 * Return the order kswapd stopped reclaiming at as
@@ -3511,6 +3527,10 @@
 	if (!waitqueue_active(&pgdat->kswapd_wait))
 		return;
 
+	/* Hopeless node, leave it to direct reclaim */
+	if (pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES)
+		return;
+
 	/* Only wake kswapd if all zones are unbalanced */
 	for (z = 0; z <= classzone_idx; z++) {
 		zone = pgdat->node_zones + z;
@@ -3781,9 +3801,6 @@
 	    sum_zone_node_page_state(pgdat->node_id, NR_SLAB_RECLAIMABLE) <= pgdat->min_slab_pages)
 		return NODE_RECLAIM_FULL;
 
-	if (!pgdat_reclaimable(pgdat))
-		return NODE_RECLAIM_FULL;
-
 	/*
 	 * Do not scan if the allocation should not be delayed.
 	 */
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 6a088df..3863b5d 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1421,7 +1421,7 @@
 		   "\n  node_unreclaimable:  %u"
 		   "\n  start_pfn:           %lu"
 		   "\n  node_inactive_ratio: %u",
-		   !pgdat_reclaimable(zone->zone_pgdat),
+		   pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES,
 		   zone->zone_start_pfn,
 		   zone->zone_pgdat->inactive_ratio);
 	seq_putc(m, '\n');
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 5488e4a..ac1552d 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -722,13 +722,12 @@
 	if (unlikely(!net_eq(dev_net(dev), &init_net)))
 		goto drop;
 
-	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
-		      skb->len != CAN_MTU ||
-		      cfd->len > CAN_MAX_DLEN,
-		      "PF_CAN: dropped non conform CAN skbuf: "
-		      "dev type %d, len %d, datalen %d\n",
-		      dev->type, skb->len, cfd->len))
+	if (unlikely(dev->type != ARPHRD_CAN || skb->len != CAN_MTU ||
+		     cfd->len > CAN_MAX_DLEN)) {
+		pr_warn_once("PF_CAN: dropped non conform CAN skbuf: dev type %d, len %d, datalen %d\n",
+			     dev->type, skb->len, cfd->len);
 		goto drop;
+	}
 
 	can_receive(skb, dev);
 	return NET_RX_SUCCESS;
@@ -746,13 +745,12 @@
 	if (unlikely(!net_eq(dev_net(dev), &init_net)))
 		goto drop;
 
-	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
-		      skb->len != CANFD_MTU ||
-		      cfd->len > CANFD_MAX_DLEN,
-		      "PF_CAN: dropped non conform CAN FD skbuf: "
-		      "dev type %d, len %d, datalen %d\n",
-		      dev->type, skb->len, cfd->len))
+	if (unlikely(dev->type != ARPHRD_CAN || skb->len != CANFD_MTU ||
+		     cfd->len > CANFD_MAX_DLEN)) {
+		pr_warn_once("PF_CAN: dropped non conform CAN FD skbuf: dev type %d, len %d, datalen %d\n",
+			     dev->type, skb->len, cfd->len);
 		goto drop;
+	}
 
 	can_receive(skb, dev);
 	return NET_RX_SUCCESS;
diff --git a/net/core/dev.c b/net/core/dev.c
index 09007a7..67b5d4d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3083,10 +3083,21 @@
 		hdr_len = skb_transport_header(skb) - skb_mac_header(skb);
 
 		/* + transport layer */
-		if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6)))
-			hdr_len += tcp_hdrlen(skb);
-		else
-			hdr_len += sizeof(struct udphdr);
+		if (likely(shinfo->gso_type & (SKB_GSO_TCPV4 | SKB_GSO_TCPV6))) {
+			const struct tcphdr *th;
+			struct tcphdr _tcphdr;
+
+			th = skb_header_pointer(skb, skb_transport_offset(skb),
+						sizeof(_tcphdr), &_tcphdr);
+			if (likely(th))
+				hdr_len += __tcp_hdrlen(th);
+		} else {
+			struct udphdr _udphdr;
+
+			if (skb_header_pointer(skb, skb_transport_offset(skb),
+					       sizeof(_udphdr), &_udphdr))
+				hdr_len += sizeof(struct udphdr);
+		}
 
 		if (shinfo->gso_type & SKB_GSO_DODGY)
 			gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
diff --git a/net/core/filter.c b/net/core/filter.c
index 5e42e0e..c385c55 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -451,6 +451,10 @@
 			    convert_bpf_extensions(fp, &insn))
 				break;
 
+			if (fp->code == (BPF_ALU | BPF_DIV | BPF_X) ||
+			    fp->code == (BPF_ALU | BPF_MOD | BPF_X))
+				*insn++ = BPF_MOV32_REG(BPF_REG_X, BPF_REG_X);
+
 			*insn = BPF_RAW_INSN(fp->code, BPF_REG_A, BPF_REG_X, 0, fp->k);
 			break;
 
@@ -1015,11 +1019,9 @@
 		 */
 		goto out_err_free;
 
-	/* We are guaranteed to never error here with cBPF to eBPF
-	 * transitions, since there's no issue with type compatibility
-	 * checks on program arrays.
-	 */
 	fp = bpf_prog_select_runtime(fp, &err);
+	if (err)
+		goto out_err_free;
 
 	kfree(old_prog);
 	return fp;
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 32e4e01..862d63e 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -550,8 +550,8 @@
 out_good:
 	ret = true;
 
-	key_control->thoff = (u16)nhoff;
 out:
+	key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
 	key_basic->n_proto = proto;
 	key_basic->ip_proto = ip_proto;
 
@@ -559,7 +559,6 @@
 
 out_bad:
 	ret = false;
-	key_control->thoff = min_t(u16, nhoff, skb ? skb->len : hlen);
 	goto out;
 }
 EXPORT_SYMBOL(__skb_flow_dissect);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index f45f619..7b31566 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -496,7 +496,7 @@
 	if (atomic_read(&tbl->entries) > (1 << nht->hash_shift))
 		nht = neigh_hash_grow(tbl, nht->hash_shift + 1);
 
-	hash_val = tbl->hash(pkey, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
+	hash_val = tbl->hash(n->primary_key, dev, nht->hash_rnd) >> (32 - nht->hash_shift);
 
 	if (n->parms->dead) {
 		rc = ERR_PTR(-EINVAL);
@@ -508,7 +508,7 @@
 	     n1 != NULL;
 	     n1 = rcu_dereference_protected(n1->next,
 			lockdep_is_held(&tbl->lock))) {
-		if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
+		if (dev == n1->dev && !memcmp(n1->primary_key, n->primary_key, key_len)) {
 			if (want_ref)
 				neigh_hold(n1);
 			rc = n1;
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index a7f05f0..1b46190 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -292,7 +292,13 @@
 		.data		= &bpf_jit_enable,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
+#ifndef CONFIG_BPF_JIT_ALWAYS_ON
 		.proc_handler	= proc_dointvec
+#else
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= &one,
+		.extra2		= &one,
+#endif
 	},
 # ifdef CONFIG_HAVE_EBPF_JIT
 	{
diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 5e3a730..7753681 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -140,6 +140,9 @@
 
 	ccid2_pr_debug("RTO_EXPIRE\n");
 
+	if (sk->sk_state == DCCP_CLOSED)
+		goto out;
+
 	/* back-off timer */
 	hc->tx_rto <<= 1;
 	if (hc->tx_rto > DCCP_RTO_MAX)
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 51b27ae..e60517e 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -223,11 +223,16 @@
 
 static int arp_constructor(struct neighbour *neigh)
 {
-	__be32 addr = *(__be32 *)neigh->primary_key;
+	__be32 addr;
 	struct net_device *dev = neigh->dev;
 	struct in_device *in_dev;
 	struct neigh_parms *parms;
+	u32 inaddr_any = INADDR_ANY;
 
+	if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT))
+		memcpy(neigh->primary_key, &inaddr_any, arp_tbl.key_len);
+
+	addr = *(__be32 *)neigh->primary_key;
 	rcu_read_lock();
 	in_dev = __in_dev_get_rcu(dev);
 	if (!in_dev) {
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 7bff0c6..9c7a4ce 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -332,7 +332,7 @@
 		return htonl(INADDR_ANY);
 
 	for_ifa(in_dev) {
-		if (inet_ifa_match(fl4->saddr, ifa))
+		if (fl4->saddr == ifa->ifa_local)
 			return fl4->saddr;
 	} endfor_ifa(in_dev);
 
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index ee6a64d..ce2b9a3 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2232,6 +2232,9 @@
 			tcp_send_active_reset(sk, GFP_ATOMIC);
 			__NET_INC_STATS(sock_net(sk),
 					LINUX_MIB_TCPABORTONMEMORY);
+		} else if (!check_net(sock_net(sk))) {
+			/* Not possible to send reset; just close */
+			tcp_set_state(sk, TCP_CLOSE);
 		}
 	}
 
diff --git a/net/ipv4/tcp_offload.c b/net/ipv4/tcp_offload.c
index bc68da3..366b1be 100644
--- a/net/ipv4/tcp_offload.c
+++ b/net/ipv4/tcp_offload.c
@@ -32,6 +32,9 @@
 static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
 					netdev_features_t features)
 {
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4))
+		return ERR_PTR(-EINVAL);
+
 	if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
 		return ERR_PTR(-EINVAL);
 
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 74db43b..6952338 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -50,11 +50,19 @@
  *  to prevent DoS attacks. It is called when a retransmission timeout
  *  or zero probe timeout occurs on orphaned socket.
  *
+ *  Also close if our net namespace is exiting; in that case there is no
+ *  hope of ever communicating again since all netns interfaces are already
+ *  down (or about to be down), and we need to release our dst references,
+ *  which have been moved to the netns loopback interface, so the namespace
+ *  can finish exiting.  This condition is only possible if we are a kernel
+ *  socket, as those do not hold references to the namespace.
+ *
  *  Criteria is still not confirmed experimentally and may change.
  *  We kill the socket, if:
  *  1. If number of orphaned sockets exceeds an administratively configured
  *     limit.
  *  2. If we have strong memory pressure.
+ *  3. If our net namespace is exiting.
  */
 static int tcp_out_of_resources(struct sock *sk, bool do_reset)
 {
@@ -83,6 +91,13 @@
 		__NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONMEMORY);
 		return 1;
 	}
+
+	if (!check_net(sock_net(sk))) {
+		/* Not possible to send reset; just close */
+		tcp_done(sk);
+		return 1;
+	}
+
 	return 0;
 }
 
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index 6401574..f4f616e 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -205,6 +205,9 @@
 		goto out;
 	}
 
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP))
+		goto out;
+
 	if (!pskb_may_pull(skb, sizeof(struct udphdr)))
 		goto out;
 
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index a7d0c01..21bd54f 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -337,11 +337,12 @@
 
 	nt->dev = dev;
 	nt->net = dev_net(dev);
-	ip6gre_tnl_link_config(nt, 1);
 
 	if (register_netdevice(dev) < 0)
 		goto failed_free;
 
+	ip6gre_tnl_link_config(nt, 1);
+
 	/* Can use a lockless transmit, unless we generate output sequences */
 	if (!(nt->parms.o_flags & TUNNEL_SEQ))
 		dev->features |= NETIF_F_LLTX;
@@ -1267,7 +1268,6 @@
 
 static int ip6gre_tap_init(struct net_device *dev)
 {
-	struct ip6_tnl *tunnel;
 	int ret;
 
 	ret = ip6gre_tunnel_init_common(dev);
@@ -1276,10 +1276,6 @@
 
 	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 
-	tunnel = netdev_priv(dev);
-
-	ip6gre_tnl_link_config(tunnel, 1);
-
 	return 0;
 }
 
@@ -1374,7 +1370,6 @@
 
 	nt->dev = dev;
 	nt->net = dev_net(dev);
-	ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
 
 	dev->features		|= GRE6_FEATURES;
 	dev->hw_features	|= GRE6_FEATURES;
@@ -1400,6 +1395,11 @@
 	if (err)
 		goto out;
 
+	ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
+
+	if (tb[IFLA_MTU])
+		ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
+
 	dev_hold(dev);
 	ip6gre_tunnel_link(ign, nt);
 
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index dd93836..55ca65c 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -165,7 +165,7 @@
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
 
-static bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
+bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
 {
 	if (!np->autoflowlabel_set)
 		return ip6_default_np_autolabel(net);
@@ -1268,14 +1268,16 @@
 	v6_cork->tclass = ipc6->tclass;
 	if (rt->dst.flags & DST_XFRM_TUNNEL)
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(&rt->dst);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst);
 	else
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(rt->dst.path);
 	if (np->frag_size < mtu) {
 		if (np->frag_size)
 			mtu = np->frag_size;
 	}
+	if (mtu < IPV6_MIN_MTU)
+		return -EINVAL;
 	cork->base.fragsize = mtu;
 	if (dst_allfrag(rt->dst.path))
 		cork->base.flags |= IPCORK_ALLFRAG;
@@ -1806,6 +1808,7 @@
 	cork.base.flags = 0;
 	cork.base.addr = 0;
 	cork.base.opt = NULL;
+	cork.base.dst = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, ipc6, rt, fl6);
 	if (err) {
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 6e3871c..bcea985 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -1316,7 +1316,7 @@
 		break;
 
 	case IPV6_AUTOFLOWLABEL:
-		val = np->autoflowlabel;
+		val = ip6_autoflowlabel(sock_net(sk), np);
 		break;
 
 	default:
diff --git a/net/ipv6/tcpv6_offload.c b/net/ipv6/tcpv6_offload.c
index d883c92..278e49c 100644
--- a/net/ipv6/tcpv6_offload.c
+++ b/net/ipv6/tcpv6_offload.c
@@ -46,6 +46,9 @@
 {
 	struct tcphdr *th;
 
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6))
+		return ERR_PTR(-EINVAL);
+
 	if (!pskb_may_pull(skb, sizeof(*th)))
 		return ERR_PTR(-EINVAL);
 
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index e7d378c..2bd2087 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -55,6 +55,9 @@
 		const struct ipv6hdr *ipv6h;
 		struct udphdr *uh;
 
+		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP))
+			goto out;
+
 		if (!pskb_may_pull(skb, sizeof(struct udphdr)))
 			goto out;
 
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index 28d0653..3f49912 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/list.h>
 #include <linux/errno.h>
+#include <linux/capability.h>
 #include <net/netlink.h>
 #include <net/sock.h>
 
@@ -392,6 +393,9 @@
 	struct nfnl_cthelper *nlcth;
 	int ret = 0;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!tb[NFCTH_NAME] || !tb[NFCTH_TUPLE])
 		return -EINVAL;
 
@@ -595,6 +599,9 @@
 	struct nfnl_cthelper *nlcth;
 	bool tuple_set = false;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (nlh->nlmsg_flags & NLM_F_DUMP) {
 		struct netlink_dump_control c = {
 			.dump = nfnl_cthelper_dump_table,
@@ -661,6 +668,9 @@
 	struct nfnl_cthelper *nlcth, *n;
 	int j = 0, ret;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (tb[NFCTH_NAME])
 		helper_name = nla_data(tb[NFCTH_NAME]);
 
diff --git a/net/netfilter/xt_osf.c b/net/netfilter/xt_osf.c
index 2455b69..b589a62 100644
--- a/net/netfilter/xt_osf.c
+++ b/net/netfilter/xt_osf.c
@@ -19,6 +19,7 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 
+#include <linux/capability.h>
 #include <linux/if.h>
 #include <linux/inetdevice.h>
 #include <linux/ip.h>
@@ -69,6 +70,9 @@
 	struct xt_osf_finger *kf = NULL, *sf;
 	int err = 0;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!osf_attrs[OSF_ATTR_FINGER])
 		return -EINVAL;
 
@@ -113,6 +117,9 @@
 	struct xt_osf_finger *sf;
 	int err = -ENOENT;
 
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
 	if (!osf_attrs[OSF_ATTR_FINGER])
 		return -EINVAL;
 
diff --git a/net/sctp/offload.c b/net/sctp/offload.c
index 4f5a2b5..6300f28 100644
--- a/net/sctp/offload.c
+++ b/net/sctp/offload.c
@@ -44,6 +44,9 @@
 	struct sk_buff *segs = ERR_PTR(-EINVAL);
 	struct sctphdr *sh;
 
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_SCTP))
+		goto out;
+
 	sh = sctp_hdr(skb);
 	if (!pskb_may_pull(skb, sizeof(*sh)))
 		goto out;
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7181ce6..c472b83 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -83,7 +83,7 @@
 static int sctp_writeable(struct sock *sk);
 static void sctp_wfree(struct sk_buff *skb);
 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
-				size_t msg_len, struct sock **orig_sk);
+				size_t msg_len);
 static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p);
 static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p);
 static int sctp_wait_for_accept(struct sock *sk, long timeo);
@@ -332,16 +332,14 @@
 	if (len < sizeof (struct sockaddr))
 		return NULL;
 
+	if (!opt->pf->af_supported(addr->sa.sa_family, opt))
+		return NULL;
+
 	/* V4 mapped address are really of AF_INET family */
 	if (addr->sa.sa_family == AF_INET6 &&
-	    ipv6_addr_v4mapped(&addr->v6.sin6_addr)) {
-		if (!opt->pf->af_supported(AF_INET, opt))
-			return NULL;
-	} else {
-		/* Does this PF support this AF? */
-		if (!opt->pf->af_supported(addr->sa.sa_family, opt))
-			return NULL;
-	}
+	    ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
+	    !opt->pf->af_supported(AF_INET, opt))
+		return NULL;
 
 	/* If we get this far, af is valid. */
 	af = sctp_get_af_specific(addr->sa.sa_family);
@@ -1958,7 +1956,7 @@
 	timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
 	if (!sctp_wspace(asoc)) {
 		/* sk can be changed by peel off when waiting for buf. */
-		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len, &sk);
+		err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
 		if (err) {
 			if (err == -ESRCH) {
 				/* asoc is already dead. */
@@ -7441,12 +7439,12 @@
 
 /* Helper function to wait for space in the sndbuf.  */
 static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
-				size_t msg_len, struct sock **orig_sk)
+				size_t msg_len)
 {
 	struct sock *sk = asoc->base.sk;
-	int err = 0;
 	long current_timeo = *timeo_p;
 	DEFINE_WAIT(wait);
+	int err = 0;
 
 	pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
 		 *timeo_p, msg_len);
@@ -7475,17 +7473,13 @@
 		release_sock(sk);
 		current_timeo = schedule_timeout(current_timeo);
 		lock_sock(sk);
-		if (sk != asoc->base.sk) {
-			release_sock(sk);
-			sk = asoc->base.sk;
-			lock_sock(sk);
-		}
+		if (sk != asoc->base.sk)
+			goto do_error;
 
 		*timeo_p = current_timeo;
 	}
 
 out:
-	*orig_sk = sk;
 	finish_wait(&asoc->wait, &wait);
 
 	/* Release the association's refcnt.  */
diff --git a/net/socket.c b/net/socket.c
index ff3872e..34dabf4 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2562,6 +2562,15 @@
 
 core_initcall(sock_init);	/* early initcall */
 
+static int __init jit_init(void)
+{
+#ifdef CONFIG_BPF_JIT_ALWAYS_ON
+	bpf_jit_enable = 1;
+#endif
+	return 0;
+}
+pure_initcall(jit_init);
+
 #ifdef CONFIG_PROC_FS
 void socket_seq_show(struct seq_file *seq)
 {
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 2775332..5b3e1ea 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -1848,36 +1848,38 @@
 
 	if (strcmp(name, tipc_bclink_name) == 0) {
 		err = tipc_nl_add_bc_link(net, &msg);
-		if (err) {
-			nlmsg_free(msg.skb);
-			return err;
-		}
+		if (err)
+			goto err_free;
 	} else {
 		int bearer_id;
 		struct tipc_node *node;
 		struct tipc_link *link;
 
 		node = tipc_node_find_by_name(net, name, &bearer_id);
-		if (!node)
-			return -EINVAL;
+		if (!node) {
+			err = -EINVAL;
+			goto err_free;
+		}
 
 		tipc_node_read_lock(node);
 		link = node->links[bearer_id].link;
 		if (!link) {
 			tipc_node_read_unlock(node);
-			nlmsg_free(msg.skb);
-			return -EINVAL;
+			err = -EINVAL;
+			goto err_free;
 		}
 
 		err = __tipc_nl_add_link(net, &msg, link, 0);
 		tipc_node_read_unlock(node);
-		if (err) {
-			nlmsg_free(msg.skb);
-			return err;
-		}
+		if (err)
+			goto err_free;
 	}
 
 	return genlmsg_reply(msg.skb, info);
+
+err_free:
+	nlmsg_free(msg.skb);
+	return err;
 }
 
 int tipc_nl_node_reset_link_stats(struct sk_buff *skb, struct genl_info *info)
diff --git a/tools/usb/usbip/libsrc/usbip_common.c b/tools/usb/usbip/libsrc/usbip_common.c
index ac73710..1517a23 100644
--- a/tools/usb/usbip/libsrc/usbip_common.c
+++ b/tools/usb/usbip/libsrc/usbip_common.c
@@ -215,9 +215,16 @@
 		       struct usbip_usb_interface *uinf)
 {
 	char busid[SYSFS_BUS_ID_SIZE];
+	int size;
 	struct udev_device *sif;
 
-	sprintf(busid, "%s:%d.%d", udev->busid, udev->bConfigurationValue, i);
+	size = snprintf(busid, sizeof(busid), "%s:%d.%d",
+			udev->busid, udev->bConfigurationValue, i);
+	if (size < 0 || (unsigned int)size >= sizeof(busid)) {
+		err("busid length %i >= %lu or < 0", size,
+		    (long unsigned)sizeof(busid));
+		return -1;
+	}
 
 	sif = udev_device_new_from_subsystem_sysname(udev_context, "usb", busid);
 	if (!sif) {
diff --git a/tools/usb/usbip/libsrc/usbip_host_common.c b/tools/usb/usbip/libsrc/usbip_host_common.c
index 9d41522..6ff7b60 100644
--- a/tools/usb/usbip/libsrc/usbip_host_common.c
+++ b/tools/usb/usbip/libsrc/usbip_host_common.c
@@ -40,13 +40,20 @@
 static int32_t read_attr_usbip_status(struct usbip_usb_device *udev)
 {
 	char status_attr_path[SYSFS_PATH_MAX];
+	int size;
 	int fd;
 	int length;
 	char status;
 	int value = 0;
 
-	snprintf(status_attr_path, SYSFS_PATH_MAX, "%s/usbip_status",
-		 udev->path);
+	size = snprintf(status_attr_path, sizeof(status_attr_path),
+			"%s/usbip_status", udev->path);
+	if (size < 0 || (unsigned int)size >= sizeof(status_attr_path)) {
+		err("usbip_status path length %i >= %lu or < 0", size,
+		    (long unsigned)sizeof(status_attr_path));
+		return -1;
+	}
+
 
 	fd = open(status_attr_path, O_RDONLY);
 	if (fd < 0) {
@@ -218,6 +225,7 @@
 {
 	char attr_name[] = "usbip_sockfd";
 	char sockfd_attr_path[SYSFS_PATH_MAX];
+	int size;
 	char sockfd_buff[30];
 	int ret;
 
@@ -237,10 +245,20 @@
 	}
 
 	/* only the first interface is true */
-	snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
-		 edev->udev.path, attr_name);
+	size = snprintf(sockfd_attr_path, sizeof(sockfd_attr_path), "%s/%s",
+			edev->udev.path, attr_name);
+	if (size < 0 || (unsigned int)size >= sizeof(sockfd_attr_path)) {
+		err("exported device path length %i >= %lu or < 0", size,
+		    (long unsigned)sizeof(sockfd_attr_path));
+		return -1;
+	}
 
-	snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
+	size = snprintf(sockfd_buff, sizeof(sockfd_buff), "%d\n", sockfd);
+	if (size < 0 || (unsigned int)size >= sizeof(sockfd_buff)) {
+		err("socket length %i >= %lu or < 0", size,
+		    (long unsigned)sizeof(sockfd_buff));
+		return -1;
+	}
 
 	ret = write_sysfs_attribute(sockfd_attr_path, sockfd_buff,
 				    strlen(sockfd_buff));
diff --git a/tools/usb/usbip/libsrc/vhci_driver.c b/tools/usb/usbip/libsrc/vhci_driver.c
index ad92047..1274f32 100644
--- a/tools/usb/usbip/libsrc/vhci_driver.c
+++ b/tools/usb/usbip/libsrc/vhci_driver.c
@@ -55,12 +55,12 @@
 
 	while (*c != '\0') {
 		int port, status, speed, devid;
-		unsigned long socket;
+		int sockfd;
 		char lbusid[SYSFS_BUS_ID_SIZE];
 
-		ret = sscanf(c, "%d %d %d %x %lx %31s\n",
+		ret = sscanf(c, "%d %d %d %x %u %31s\n",
 				&port, &status, &speed,
-				&devid, &socket, lbusid);
+				&devid, &sockfd, lbusid);
 
 		if (ret < 5) {
 			dbg("sscanf failed: %d", ret);
@@ -69,7 +69,7 @@
 
 		dbg("port %d status %d speed %d devid %x",
 				port, status, speed, devid);
-		dbg("socket %lx lbusid %s", socket, lbusid);
+		dbg("sockfd %u lbusid %s", sockfd, lbusid);
 
 
 		/* if a device is connected, look at it */
diff --git a/tools/usb/usbip/src/usbip.c b/tools/usb/usbip/src/usbip.c
index d7599d9..73d8eee 100644
--- a/tools/usb/usbip/src/usbip.c
+++ b/tools/usb/usbip/src/usbip.c
@@ -176,6 +176,8 @@
 			break;
 		case '?':
 			printf("usbip: invalid option\n");
+			/* Terminate after printing error */
+			/* FALLTHRU */
 		default:
 			usbip_usage();
 			goto out;