Commit 4f40c6e5 authored Feb 03, 2017 by Peter Zijlstra Committed by Linus Torvalds Feb 03, 2017

kasan: respect /proc/sys/kernel/traceoff_on_warning

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>

parent d7b028f5

mm/kasan/report.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,7 @@
		*
		*/

		#include <linux/ftrace.h>
		#include <linux/kernel.h>
		#include <linux/mm.h>
		#include <linux/printk.h>
		@@ -300,6 +301,8 @@ 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;

Admin message