The patch titled
Subject: kasan: test: avoid corrupting memory in kasan_rcu_uaf
has been removed from the -mm tree. Its filename was
kasan-test-avoid-corrupting-memory-in-kasan_rcu_uaf.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Subject: kasan: test: avoid corrupting memory in kasan_rcu_uaf
kasan_rcu_uaf() writes to freed memory via kasan_rcu_reclaim(), which is
only safe with the GENERIC mode (as it uses quarantine). For other modes,
this test corrupts kernel memory, which might result in a crash.
Turn the write into a read.
Link: https://lkml.kernel.org/r/b6f2c3bf712d2457c783fa59498225b66a634f62.1628779805.git.andreyknvl@xxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_kasan_module.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/test_kasan_module.c~kasan-test-avoid-corrupting-memory-in-kasan_rcu_uaf
+++ a/lib/test_kasan_module.c
@@ -71,7 +71,7 @@ static noinline void __init kasan_rcu_re
struct kasan_rcu_info, rcu);
kfree(fp);
- fp->i = 1;
+ ((volatile struct kasan_rcu_info *)fp)->i;
}
static noinline void __init kasan_rcu_uaf(void)
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxx are
