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| author | Wenwen Wang <wenwen@cs.uga.edu> | 2019-07-14 01:11:35 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-25 14:39:52 +0200 |
| commit | d4fddac5a51c378c5d3e68658816c37132611e1f (patch) | |
| tree | eb60738ab242cb89e026fda8b0deca5bf06ebe27 | |
| parent | 0c7d37f4d9b8446956e97b7c5e61173cdb7c8522 (diff) | |
| download | linux-d4fddac5a51c378c5d3e68658816c37132611e1f.tar.bz2 | |
test_firmware: fix a memory leak bug
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>
| -rw-r--r-- | lib/test_firmware.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 83ea6c4e623c..6ca97a63b3d6 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) { |