On Wed, Sep 06, 2023 at 05:45:25PM +0530, Deepak Rathore wrote:
From: Zheng Wang zyytlz.wz@163.com
[ Upstream commit 73f7b171b7c09139eb3c6a5677c200dc1be5f318 ]
In btsdio_probe, the data->work is bound with btsdio_work. It will be started in btsdio_send_frame.
If the btsdio_remove runs with a unfinished work, there may be a race condition that hdev is freed but used in btsdio_work. Fix it by canceling the work before do cleanup in btsdio_remove.
Signed-off-by: Zheng Wang zyytlz.wz@163.com Signed-off-by: Luiz Augusto von Dentz luiz.von.dentz@intel.com Signed-off-by: Deepak Rathore deeratho@cisco.com
Meta-comment, are you SURE you want this applied? If so, why was it reverted upstream in 6.4 in commit db2bf510bd5d ("Revert "Bluetooth: btsdio: fix use after free bug in btsdio_remove due to unfinished work"")
What testing did you do that determined this should be added to the tree? How did you come up with just this one commit to be requested to be applied to just this one branch?
thanks,
greg k-h-