Unverified Commit ca3d9e6a authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!13043 tty: n_gsm: Fix use-after-free in gsm_cleanup_mux 

Merge Pull Request from: @ci-robot 
 
PR sync from: Yi Yang <yiyang13@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ZHISNEEWVBE5UGCI2KVCQSHHTP74BPME/ 
 
https://gitee.com/src-openeuler/kernel/issues/IB0EQM 
 
Link:https://gitee.com/openeuler/kernel/pulls/13043

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 75b662fc c160ea05

drivers/tty/n_gsm.c

+2 −0
Original line number Diff line number Diff line
@@ -3156,6 +3156,8 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc) 
	mutex_unlock(&gsm->mutex);

	/* Now wipe the queues */

	tty_ldisc_flush(gsm->tty);



	guard(spinlock_irqsave)(&gsm->tx_lock);

	list_for_each_entry_safe(txq, ntxq, &gsm->tx_ctrl_list, list)

		kfree(txq);

	INIT_LIST_HEAD(&gsm->tx_ctrl_list);