[Kernel] Re: [PATCH OpenHarmony-5.10 15/18] net: nfc: nci: Change the NCI close sequence

在 2022/1/24 9:03, yiyuchangchun@126.com 写道:

From: Bongsu Jeon

stable inclusion form stable-v5.10.82 commit b2a60b4a0195ba918ce924ba0616048ce09a3cc5 issue: #I4RVJ4 CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

Signed-off-by: Yu Changchun --------------------------------

[ Upstream commit f011539e723c737b74876ac47345e40270a3c384 ]

If there is a NCI command in work queue after closing the NCI device at nci_unregister_device, The NCI command timer starts at flush_workqueue function and then NCI command timeout handler would be called 5 second after flushing the NCI command work queue and destroying the queue. At that time, the timeout handler would try to use NCI command work queue that is destroyed already. it will causes the problem. To avoid this abnormal situation, change the sequence to prevent the NCI command timeout handler from being called after destroying the NCI command work queue.

Signed-off-by: Bongsu Jeon Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Chen Jun Signed-off-by: Zheng Zengkai Signed-off-by: Yu Changchun --- net/nfc/nci/core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Wei Yongjun