UPSTREAM: Do not hash userspace addresses in fault handlers
The hashing of %p was designed to restrict kernel addresses. There is
no reason to hash the userspace values seen during a segfault report,
so switch these to %px. (Some architectures already use %lx.)
Fixes: ad67b74d2469d9b8 ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 10a7e9d849150a2879efc0b04d8a51068c9dd0c5)
Signed-off-by: Sandeep Patil <sspatil@android.com>
Bug: 78533979
Test: Build and boot cuttlefish
Change-Id: Ifd289b69e0ecf51cab5afe847943b72a0c7320ef
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 4714061..0ae73ee 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -112,7 +112,7 @@
if (!printk_ratelimit())
return;
- printk("%s%s[%d]: segfault at %lx ip %p (rpc %p) sp %p error %x",
+ printk("%s%s[%d]: segfault at %lx ip %px (rpc %px) sp %px error %x",
task_pid_nr(tsk) > 1 ? KERN_INFO : KERN_EMERG,
tsk->comm, task_pid_nr(tsk), address,
(void *)regs->pc, (void *)regs->u_regs[UREG_I7],