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| author | Duoming Zhou <duoming@zju.edu.cn> | 2024-05-09 17:37:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-30 09:44:39 +0200 |
| commit | eef95df9b752699bddecefa851f64858247246e9 (patch) | |
| tree | f3edc2c04d3574499e1fa123956526417d6c9901 /drivers/cdx/controller/cdx_controller.h | |
| parent | 1ea02699c7557eeb35ccff2bd822de1b3e09d868 (diff) | |
ax25: Fix reference count leak issue of net_device
[ Upstream commit 36e56b1b002bb26440403053f19f9e1a8bc075b2 ]
There is a reference count leak issue of the object "net_device" in
ax25_dev_device_down(). When the ax25 device is shutting down, the
ax25_dev_device_down() drops the reference count of net_device one
or zero times depending on if we goto unlock_put or not, which will
cause memory leak.
In order to solve the above issue, decrease the reference count of
net_device after dev->ax25_ptr is set to null.
Fixes: d01ffb9eee4a ("ax25: add refcount in ax25_dev to avoid UAF bugs")
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/7ce3b23a40d9084657ba1125432f0ecc380cbc80.1715247018.git.duoming@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/cdx/controller/cdx_controller.h')
0 files changed, 0 insertions, 0 deletions