From: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr

[ Upstream commit be37bed754ed90b2655382f93f9724b3c1aae847 ]

Dan Carpenter spotted that test_fw_config->reqs will be leaked if trigger_batched_requests_store() is called two or more times. The same appears with trigger_batched_requests_async_store().

This bug wasn't trigger by the tests, but observed by Dan's visual inspection of the code.

The recommended workaround was to return -EBUSY if test_fw_config->reqs is already allocated.

Fixes: 7feebfa487b92 ("test_firmware: add support for request_firmware_into_buf") Cc: Luis Chamberlain mcgrof@kernel.org Cc: Greg Kroah-Hartman gregkh@linuxfoundation.org Cc: Russ Weight russell.h.weight@intel.com Cc: Tianfei Zhang tianfei.zhang@intel.com Cc: Shuah Khan shuah@kernel.org Cc: Colin Ian King colin.i.king@gmail.com Cc: Randy Dunlap rdunlap@infradead.org Cc: linux-kselftest@vger.kernel.org Cc: stable@vger.kernel.org # v5.4 Suggested-by: Dan Carpenter error27@gmail.com Suggested-by: Takashi Iwai tiwai@suse.de Signed-off-by: Mirsad Goran Todorovac mirsad.todorovac@alu.unizg.hr Reviewed-by: Dan Carpenter dan.carpenter@linaro.org Acked-by: Luis Chamberlain mcgrof@kernel.org Link: https://lore.kernel.org/r/20230509084746.48259-2-mirsad.todorovac@alu.unizg.... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/test_firmware.c | 10 ++++++++++ 1 file changed, 10 insertions(+)

diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 4ad01dbe7e729..2a4078946a3fd 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -863,6 +863,11 @@ static ssize_t trigger_batched_requests_store(struct device *dev,

mutex_lock(&test_fw_mutex);

+ if (test_fw_config->reqs) { + rc = -EBUSY; + goto out_bail; + } + test_fw_config->reqs = vzalloc(array3_size(sizeof(struct test_batched_req), test_fw_config->num_requests, 2)); @@ -962,6 +967,11 @@ ssize_t trigger_batched_requests_async_store(struct device *dev,

mutex_lock(&test_fw_mutex);

+ if (test_fw_config->reqs) { + rc = -EBUSY; + goto out_bail; + } + test_fw_config->reqs = vzalloc(array3_size(sizeof(struct test_batched_req), test_fw_config->num_requests, 2));