From: David Gow davidgow@google.com
[ Upstream commit 94681e289bf5d10c9db9db143d1a22d8717205c5 ]
It's possible that memory allocation for 'filtered' will fail, but for the copy of the suite to succeed. In this case, the copy could be leaked.
Properly free 'copy' in the error case for the allocation of 'filtered' failing.
Note that there may also have been a similar issue in kunit_filter_subsuites, before it was removed in "kunit: flatten kunit_suite*** to kunit_suite** in .kunit_test_suites".
This was reported by clang-analyzer via the kernel test robot, here: https://lore.kernel.org/all/c8073b8e-7b9e-0830-4177-87c12f16349c@intel.com/
And by smatch via Dan Carpenter and the kernel test robot: https://lore.kernel.org/all/202207101328.ASjx88yj-lkp@intel.com/
Fixes: a02353f49162 ("kunit: bail out of test filtering logic quicker if OOM") Reported-by: kernel test robot yujie.liu@intel.com Reported-by: kernel test robot lkp@intel.com Reported-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Daniel Latypov dlatypov@google.com Reviewed-by: Brendan Higgins brendanhiggins@google.com Signed-off-by: David Gow davidgow@google.com Signed-off-by: Shuah Khan skhan@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/kunit/executor.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/kunit/executor.c b/lib/kunit/executor.c index 96f96e42ce06..16fb88c0aca3 100644 --- a/lib/kunit/executor.c +++ b/lib/kunit/executor.c @@ -76,8 +76,10 @@ kunit_filter_tests(struct kunit_suite *const suite, const char *test_glob) memcpy(copy, suite, sizeof(*copy));
filtered = kcalloc(n + 1, sizeof(*filtered), GFP_KERNEL); - if (!filtered) + if (!filtered) { + kfree(copy); return ERR_PTR(-ENOMEM); + }
n = 0; kunit_suite_for_each_test_case(suite, test_case) {