From: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com
stable inclusion from stable-v5.10.199 commit db9aafa19547833240f58c2998aed7baf414dc82 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7EDZ1 CVE: CVE-2023-35827
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 3971442870713de527684398416970cf025b4f89 upstream.
The ravb_stop() should call cancel_work_sync(). Otherwise, ravb_tx_timeout_work() is possible to use the freed priv after ravb_remove() was called like below:
CPU0 CPU1 ravb_tx_timeout() ravb_remove() unregister_netdev() free_netdev(ndev) // free priv ravb_tx_timeout_work() // use priv
unregister_netdev() will call .ndo_stop() so that ravb_stop() is called. And, after phy_stop() is called, netif_carrier_off() is also called. So that .ndo_tx_timeout() will not be called after phy_stop().
Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper") Reported-by: Zheng Wang zyytlz.wz@163.com Closes: https://lore.kernel.org/netdev/20230725030026.1664873-1-zyytlz.wz@163.com/ Signed-off-by: Yoshihiro Shimoda yoshihiro.shimoda.uh@renesas.com Reviewed-by: Sergey Shtylyov s.shtylyov@omp.ru Link: https://lore.kernel.org/r/20231005011201.14368-3-yoshihiro.shimoda.uh@renesa... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Ziyang Xuan william.xuanziyang@huawei.com --- drivers/net/ethernet/renesas/ravb_main.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 98337f5f2036..efa075af7241 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -1710,6 +1710,8 @@ static int ravb_close(struct net_device *ndev) of_phy_deregister_fixed_link(np); }
+ cancel_work_sync(&priv->work); + if (priv->chip_id != RCAR_GEN2) { free_irq(priv->tx_irqs[RAVB_NC], ndev); free_irq(priv->rx_irqs[RAVB_NC], ndev);