From: Eddie James <eajames@linux.ibm.com> mainline inclusion from mainline-v6.12-rc2 commit a0ffa68c70b367358b2672cdab6fa5bc4c40de2c category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRA5 CVE: CVE-2024-49945 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- The work function can run after the ncsi device is freed, resulting in use-after-free bugs or kernel panic. Fixes: 2d283bdd079c ("net/ncsi: Resource management") Signed-off-by: Eddie James <eajames@linux.ibm.com> Link: https://patch.msgid.link/20240925155523.1017097-1-eajames@linux.ibm.com Signed-off-by: Paolo Abeni <pabeni@redhat.com> Conflicts: net/ncsi/ncsi-manage.c [commit 86898fa6b8cd ("workqueue: Implement disable/enable for (delayed) work items") not merged] Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com> --- net/ncsi/ncsi-manage.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c index ffff8da..4f51dc0 100644 --- a/net/ncsi/ncsi-manage.c +++ b/net/ncsi/ncsi-manage.c @@ -1895,6 +1895,8 @@ void ncsi_unregister_dev(struct ncsi_dev *nd) list_del_rcu(&ndp->node); spin_unlock_irqrestore(&ncsi_dev_lock, flags); + cancel_work_sync(&ndp->work); + kfree(ndp); } EXPORT_SYMBOL_GPL(ncsi_unregister_dev); -- 2.9.5