From: Zheng Wang zyytlz.wz@163.com
stable inclusion from stable-v4.19.279 commit 526660c25d3b93b1232a525b75469048388f0928 category: bugfix bugzilla: 188641, https://gitee.com/src-openeuler/kernel/issues/I6R4MM CVE: CVE-2023-1670
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit e8d20c3ded59a092532513c9bd030d1ea66f5f44 ]
In xirc2ps_probe, the local->tx_timeout_task was bounded with xirc2ps_tx_timeout_task. When timeout occurs, it will call xirc_tx_timeout->schedule_work to start the work.
When we call xirc2ps_detach to remove the driver, there may be a sequence as follows:
Stop responding to timeout tasks and complete scheduled tasks before cleanup in xirc2ps_detach, which will fix the problem.
CPU0 CPU1
|xirc2ps_tx_timeout_task xirc2ps_detach | free_netdev | kfree(dev); | | | do_reset | //use dev
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Zheng Wang zyytlz.wz@163.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Dong Chenchen dongchenchen2@huawei.com Reviewed-by: Liu Jian liujian56@huawei.com Reviewed-by: Wang Weiyang wangweiyang2@huawei.com Signed-off-by: Yongqiang Liu liuyongqiang13@huawei.com --- drivers/net/ethernet/xircom/xirc2ps_cs.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/xircom/xirc2ps_cs.c b/drivers/net/ethernet/xircom/xirc2ps_cs.c index fd5288ff53b5..e3438cef5f9c 100644 --- a/drivers/net/ethernet/xircom/xirc2ps_cs.c +++ b/drivers/net/ethernet/xircom/xirc2ps_cs.c @@ -503,6 +503,11 @@ static void xirc2ps_detach(struct pcmcia_device *link) { struct net_device *dev = link->priv; + struct local_info *local = netdev_priv(dev); + + netif_carrier_off(dev); + netif_tx_disable(dev); + cancel_work_sync(&local->tx_timeout_task);
dev_dbg(&link->dev, "detach\n");