The patch titled
Subject: kasan: respect /proc/sys/kernel/traceoff_on_warning
has been added to the -mm tree. Its filename is
kasan-respect-proc-sys-kernel-traceoff_on_warning.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-respect-proc-sys-kernel-traceoff_on_warning.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-respect-proc-sys-kernel-traceoff_on_warning.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Acked-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/report.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/kasan/report.c~kasan-respect-proc-sys-kernel-traceoff_on_warning mm/kasan/report.c
--- a/mm/kasan/report.c~kasan-respect-proc-sys-kernel-traceoff_on_warning
+++ a/mm/kasan/report.c
@@ -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, si
if (likely(!kasan_report_enabled()))
return;
+ disable_trace_on_warning();
+
info.access_addr = (void *)addr;
info.access_size = size;
info.is_write = is_write;
_
Patches currently in -mm which might be from peterz@xxxxxxxxxxxxx are
kasan-respect-proc-sys-kernel-traceoff_on_warning.patch
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