kasan: don't use __builtin_return_address(1)
__builtin_return_address(1) is unreliable without frame pointers.
With defconfig on kmalloc_pagealloc_invalid_free test I am getting:
BUG: KASAN: double-free or invalid-free in (null)
Pass caller PC from callers explicitly.
Link: http://lkml.kernel.org/r/9b01bc2d237a4df74ff8472a3bf6b7635908de01.1514378558.git.dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>a
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 55916ad..7520699 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -326,12 +326,12 @@
}
}
-void kasan_report_invalid_free(void *object, void *ip)
+void kasan_report_invalid_free(void *object, unsigned long ip)
{
unsigned long flags;
kasan_start_report(&flags);
- pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", ip);
+ pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
pr_err("\n");
print_address_description(object);
pr_err("\n");