linux/mm/kasan
Arnd Bergmann e7701557bf kasan: avoid -Wmaybe-uninitialized warning
gcc-7 produces this warning:

  mm/kasan/report.c: In function 'kasan_report':
  mm/kasan/report.c:351:3: error: 'info.first_bad_addr' may be used uninitialized in this function [-Werror=maybe-uninitialized]
     print_shadow_for_address(info->first_bad_addr);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  mm/kasan/report.c:360:27: note: 'info.first_bad_addr' was declared here

The code seems fine as we only print info.first_bad_addr when there is a
shadow, and we always initialize it in that case, but this is relatively
hard for gcc to figure out after the latest rework.

Adding an intialization to the most likely value together with the other
struct members shuts up that warning.

Fixes: b235b9808664 ("kasan: unify report headers")
Link: https://patchwork.kernel.org/patch/9641417/
Link: http://lkml.kernel.org/r/20170725152739.4176967-1-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Alexander Potapenko <glider@google.com>
Suggested-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-08-02 16:34:46 -07:00
..
kasan_init.c mm/kasan/kasan_init.c: use kasan_zero_pud for p4d table 2017-07-10 16:32:33 -07:00
kasan.c mm/kasan/kasan.c: rename XXX_is_zero to XXX_is_nonzero 2017-07-10 16:32:33 -07:00
kasan.h kasan: improve double-free report format 2017-05-03 15:52:12 -07:00
Makefile mm, kasan: switch SLUB to stackdepot, enable memory quarantine for SLUB 2016-07-28 16:07:41 -07:00
quarantine.c kasan: fix races in quarantine_remove_cache() 2017-03-09 17:01:10 -08:00
report.c kasan: avoid -Wmaybe-uninitialized warning 2017-08-02 16:34:46 -07:00