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kasan: respect /proc/sys/kernel/traceoff_on_warning

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[ Upstream commit 4f40c6e5627ea73b4e7c615c59631f38cc880885 ]

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.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Zijlstra 2017-05-23 21:53:57 -04:00 • committed by Greg Kroah-Hartman
parent 1948d0afe4
commit 55d0f89a1a
1 changed files with 3 additions and 0 deletions
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3
mm/kasan/report.c
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@ -13,6 +13,7 @@
*
*/
#include <linux/ftrace.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/printk.h>
@ -251,6 +252,8 @@ void kasan_report(unsigned long addr, size_t size,
if (likely(!kasan_report_enabled()))
return;
disable_trace_on_warning();
info.access_addr = (void *)addr;
info.access_size = size;
info.is_write = is_write;