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kasan: restructure kasan_report

Browse source 
Restructure kasan_report() to make reviewing the subsequent patches
easier.

Link: https://lkml.kernel.org/r/ca28042889858b8cc4724d3d4378387f90d7a59d.1646237226.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrey Konovalov 2022-03-24 18:12:49 -07:00 committed by Linus Torvalds
parent b91328002d
commit b3bb1d700e
1 changed files with 9 additions and 6 deletions
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15
mm/kasan/report.c
View file

@ -457,15 +457,18 @@ static void __kasan_report(void *addr, size_t size, bool is_write,
bool kasan_report(unsigned long addr, size_t size, bool is_write,
unsigned long ip)
{
unsigned long flags = user_access_save();
bool ret = false;
unsigned long ua_flags = user_access_save();
bool ret = true;
if (likely(report_enabled())) {
__kasan_report((void *)addr, size, is_write, ip);
ret = true;
if (unlikely(!report_enabled())) {
ret = false;
goto out;
}
user_access_restore(flags);
__kasan_report((void *)addr, size, is_write, ip);
out:
user_access_restore(ua_flags);
return ret;
}