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: Jianqi Ren jianqi.ren.cn@windriver.com Signed-off-by: He Zhe zhe.he@windriver.com --- Verified the build test --- 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 b8556a2e7bb1..e499e13856fb 100644 --- a/lib/overflow_kunit.c +++ b/lib/overflow_kunit.c @@ -608,7 +608,6 @@ 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;

@@ -618,7 +617,7 @@ static void overflow_allocation_test(struct kunit *test) } while (0)

/* Create dummy device for devm_kmalloc()-family tests. */ - dev = root_device_register(device_name); + dev = root_device_register("overflow-test"); KUNIT_ASSERT_FALSE_MSG(test, IS_ERR(dev), "Cannot register test device\n");