commit d68eb28685c50b53fe9794e9d84f1a2adf52b06a
author Mahesh A Saptasagar <c_msapta@qti.qualcomm.com> Wed Dec 17 14:20:19 2014 +0530
committer Kiet Lam <c_kietl@qca.qualcomm.com> Sat Dec 27 15:50:18 2014 -0800
tree 0ca2cfee88a6e94d7cee8b7a996f6b25b55b4f3f
parent 48e31710932d0bc625005b6ab45c04fda1da4324

wlan: Protect cfg80211 netdev ops and wext ioctls from SSR

Protect cfg80211, netdev ops functions and hostapd, wext ioctls from
accessing uninitialized or de-allocated data structures while SSR is
in progress.

Change-Id: I0c41da99ac245ed8b5580246f3e79f3a02ba2051
CRs-Fixed: 772343

CORE/HDD/src/wlan_hdd_debugfs.c

diff --git a/CORE/HDD/src/wlan_hdd_debugfs.c b/CORE/HDD/src/wlan_hdd_debugfs.c
index 52b6a61..8504057 100644
--- a/CORE/HDD/src/wlan_hdd_debugfs.c
+++ b/CORE/HDD/src/wlan_hdd_debugfs.c
@@ -28,12 +28,13 @@
 #ifdef WLAN_OPEN_SOURCE
 #include <wlan_hdd_includes.h>
 #include <wlan_hdd_wowl.h>
+#include <vos_sched.h>
 
 #define MAX_USER_COMMAND_SIZE_WOWL_ENABLE 8
 #define MAX_USER_COMMAND_SIZE_WOWL_PATTERN 512
 #define MAX_USER_COMMAND_SIZE_FRAME 4096
 
-static ssize_t wcnss_wowenable_write(struct file *file,
+static ssize_t __wcnss_wowenable_write(struct file *file,
                const char __user *buf, size_t count, loff_t *ppos)
 {
     hdd_adapter_t *pAdapter = (hdd_adapter_t *)file->private_data;
@@ -126,7 +127,19 @@
     return count;
 }
 
-static ssize_t wcnss_wowpattern_write(struct file *file,
+static ssize_t wcnss_wowenable_write(struct file *file,
+               const char __user *buf, size_t count, loff_t *ppos)
+{
+    ssize_t ret;
+
+    vos_ssr_protect(__func__);
+    ret = __wcnss_wowenable_write(file, buf, count, ppos);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+}
+
+static ssize_t __wcnss_wowpattern_write(struct file *file,
                const char __user *buf, size_t count, loff_t *ppos)
 {
     hdd_adapter_t *pAdapter = (hdd_adapter_t *)file->private_data;
@@ -213,7 +226,19 @@
     return count;
 }
 
-static ssize_t wcnss_patterngen_write(struct file *file,
+static ssize_t wcnss_wowpattern_write(struct file *file,
+               const char __user *buf, size_t count, loff_t *ppos)
+{
+    ssize_t ret;
+
+    vos_ssr_protect(__func__);
+    ret = __wcnss_wowpattern_write(file, buf, count, ppos);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+}
+
+static ssize_t __wcnss_patterngen_write(struct file *file,
                const char __user *buf, size_t count, loff_t *ppos)
 {
     hdd_adapter_t *pAdapter = (hdd_adapter_t *)file->private_data;
@@ -418,7 +443,20 @@
     return -EINVAL;
 }
 
-static int wcnss_debugfs_open(struct inode *inode, struct file *file)
+static ssize_t wcnss_patterngen_write(struct file *file,
+               const char __user *buf, size_t count, loff_t *ppos)
+{
+    ssize_t ret;
+
+    vos_ssr_protect(__func__);
+    ret = __wcnss_patterngen_write(file, buf, count, ppos);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+
+}
+
+static int __wcnss_debugfs_open(struct inode *inode, struct file *file)
 {
     if (inode->i_private)
     {
@@ -428,6 +466,17 @@
     return 0;
 }
 
+static int wcnss_debugfs_open(struct inode *inode, struct file *file)
+{
+    int ret;
+
+    vos_ssr_protect(__func__);
+    ret = __wcnss_debugfs_open(inode, file);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+}
+
 static const struct file_operations fops_wowenable = {
     .write = wcnss_wowenable_write,
     .open = wcnss_debugfs_open,