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| author | Hangyu Hua <hbh25y@gmail.com> | 2022-04-18 11:57:58 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 11:21:14 +0300 |
| commit | ee89d8dee55ab4b3b8ad8b70866b2841ba334767 (patch) | |
| tree | e65a9f6bacd999beab1e5c244a32c1c235bac2c2 /drivers/misc | |
| parent | 22c3fea20a9418fa82286d6d58e8222c66725861 (diff) | |
| download | linux-ee89d8dee55ab4b3b8ad8b70866b2841ba334767.tar.xz | |
misc: ocxl: fix possible double free in ocxl_file_register_afu
[ Upstream commit 950cf957fe34d40d63dfa3bf3968210430b6491e ]
info_release() will be called in device_unregister() when info->dev's
reference count is 0. So there is no need to call ocxl_afu_put() and
kfree() again.
Fix this by adding free_minor() and return to err_unregister error path.
Fixes: 75ca758adbaf ("ocxl: Create a clear delineation between ocxl backend & frontend")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220418085758.38145-1-hbh25y@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/ocxl/file.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c index 4d1b44de1492..c742ab02ae18 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -558,7 +558,9 @@ int ocxl_file_register_afu(struct ocxl_afu *afu) err_unregister: ocxl_sysfs_unregister_afu(info); // safe to call even if register failed + free_minor(info); device_unregister(&info->dev); + return rc; err_put: ocxl_afu_put(afu); free_minor(info); |