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authorJosh Poimboeuf <jpoimboe@redhat.com>2016-11-17 09:57:24 -0600
committerIngo Molnar <mingo@kernel.org>2016-11-18 09:38:00 +0100
commit91e08ab0c8515450258d7ad9033bfe69bebad25a (patch)
tree93dce94703076bf2623f453a8569c5b620a05958 /arch/x86
parentc2d75e03d6307bda0e14b616818a6f7b09fd623a (diff)
downloadblackbird-op-linux-91e08ab0c8515450258d7ad9033bfe69bebad25a.tar.gz
blackbird-op-linux-91e08ab0c8515450258d7ad9033bfe69bebad25a.zip
x86/dumpstack: Prevent KASAN false positive warnings
The oops stack dump code scans the entire stack, which can cause KASAN "stack-out-of-bounds" false positive warnings. Tell KASAN to ignore it. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: davej@codemonkey.org.uk Cc: dvyukov@google.com Link: http://lkml.kernel.org/r/5f6e80c4b0c7f7f0b6211900847a247cdaad753c.1479398226.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/dumpstack.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 9b7cf5c28f5f..85f854b98a9d 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -112,7 +112,7 @@ void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
for (; stack < stack_info.end; stack++) {
unsigned long real_addr;
int reliable = 0;
- unsigned long addr = *stack;
+ unsigned long addr = READ_ONCE_NOCHECK(*stack);
unsigned long *ret_addr_p =
unwind_get_return_address_ptr(&state);
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