Commit 8bc30cf0 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Sasha Levin

kasan: respect /proc/sys/kernel/traceoff_on_warning

[ Upstream commit 4f40c6e5 ]

After much waiting I finally reproduced a KASAN issue, only to find my
trace-buffer empty of useful information because it got spooled out :/

Make kasan_report honour the /proc/sys/kernel/traceoff_on_warning
interface.

Link: http://lkml.kernel.org/r/20170125164106.3514-1-aryabinin@virtuozzo.comSigned-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: default avatarAlexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
parent acd66665
...@@ -13,6 +13,7 @@ ...@@ -13,6 +13,7 @@
* *
*/ */
#include <linux/ftrace.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/printk.h> #include <linux/printk.h>
...@@ -223,6 +224,8 @@ void kasan_report(unsigned long addr, size_t size, ...@@ -223,6 +224,8 @@ void kasan_report(unsigned long addr, size_t size,
if (likely(!kasan_enabled())) if (likely(!kasan_enabled()))
return; return;
disable_trace_on_warning();
info.access_addr = (void *)addr; info.access_addr = (void *)addr;
info.access_size = size; info.access_size = size;
info.is_write = is_write; info.is_write = is_write;
......
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