[PATCH] kunit/overflow: Fix UB in overflow_allocation_test
From: Ivan Orlov
Date: Wed Aug 14 2024 - 20:04:49 EST
The 'device_name' array doesn't exist out of the
'overflow_allocation_test' function scope. However, it is being used as
a driver name when calling 'kunit_driver_create' from
'kunit_device_register'. It produces the kernel panic with KASAN
enabled.
Since this variable is used in one place only, remove it and pass the
device name into kunit_device_register directly as an ascii string.
Signed-off-by: Ivan Orlov <ivan.orlov0322@xxxxxxxxx>
---
lib/overflow_kunit.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/lib/overflow_kunit.c b/lib/overflow_kunit.c
index f314a0c15a6d..2abc78367dd1 100644
--- a/lib/overflow_kunit.c
+++ b/lib/overflow_kunit.c
@@ -668,7 +668,6 @@ DEFINE_TEST_ALLOC(devm_kzalloc, devm_kfree, 1, 1, 0);
static void overflow_allocation_test(struct kunit *test)
{
- const char device_name[] = "overflow-test";
struct device *dev;
int count = 0;
@@ -678,7 +677,7 @@ static void overflow_allocation_test(struct kunit *test)
} while (0)
/* Create dummy device for devm_kmalloc()-family tests. */
- dev = kunit_device_register(test, device_name);
+ dev = kunit_device_register(test, "overflow-test");
KUNIT_ASSERT_FALSE_MSG(test, IS_ERR(dev),
"Cannot register test device\n");
--
2.34.1