From: Ivan Orlov ivan.orlov0322@gmail.com
[ Upstream commit 92e9bac18124682c4b99ede9ee3bcdd68f121e92 ]
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@gmail.com Reviewed-by: David Gow davidgow@google.com Link: https://lore.kernel.org/r/20240815000431.401869-1-ivan.orlov0322@gmail.com Signed-off-by: Kees Cook kees@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 d305b0c054bb7..9249181fff37a 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");