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authorAndrey Konovalov <andreyknvl@gmail.com>2021-09-02 14:57:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-03 09:58:15 -0700
commitb38fcca339dbcf680c9e43054502608fabc81508 (patch)
tree8905c0956dd189ca6c58daf64332ec837054eb00 /lib
parent25b12a58e848459ae2dbf2e7d318ef168bd1c5e2 (diff)
kasan: test: clean up ksize_uaf
Some KASAN tests use global variables to store function returns values so that the compiler doesn't optimize away these functions. ksize_uaf() doesn't call any functions, so it doesn't need to use kasan_int_result. Use volatile accesses instead, to be consistent with other similar tests. Link: https://lkml.kernel.org/r/a1fc34faca4650f4a6e4dfb3f8d8d82c82eb953a.1628779805.git.andreyknvl@gmail.com Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com> Reviewed-by: Marco Elver <elver@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: 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>
Diffstat (limited to 'lib')
-rw-r--r--lib/test_kasan.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 1dcba6dbfc97..30f2cde96e81 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -737,8 +737,8 @@ static void ksize_uaf(struct kunit *test)
kfree(ptr);
KUNIT_EXPECT_KASAN_FAIL(test, ksize(ptr));
- KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = *ptr);
- KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = *(ptr + size));
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[0]);
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[size]);
}
static void kasan_stack_oob(struct kunit *test)