From: Wenwen Wang wenwen@cs.uga.edu
[ Upstream commit d4fddac5a51c378c5d3e68658816c37132611e1f ]
In test_firmware_init(), the buffer pointed to by the global pointer 'test_fw_config' is allocated through kzalloc(). Then, the buffer is initialized in __test_firmware_config_init(). In the case that the initialization fails, the following execution in test_firmware_init() needs to be terminated with an error code returned to indicate this failure. However, the allocated buffer is not freed on this execution path, leading to a memory leak bug.
To fix the above issue, free the allocated buffer before returning from test_firmware_init().
Signed-off-by: Wenwen Wang wenwen@cs.uga.edu Link: https://lore.kernel.org/r/1563084696-6865-1-git-send-email-wang6495@umn.edu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- lib/test_firmware.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 83ea6c4e623cf..6ca97a63b3d6b 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -886,8 +886,11 @@ static int __init test_firmware_init(void) return -ENOMEM;
rc = __test_firmware_config_init(); - if (rc) + if (rc) { + kfree(test_fw_config); + pr_err("could not init firmware test config: %d\n", rc); return rc; + }
rc = misc_register(&test_fw_misc_device); if (rc) {