From: Pavel Skripkin <paskripkin@gmail.com> stable inclusion from stable-5.10.53 commit f33605908a9b6063525e9f68e62d739948c5fccf bugzilla: 175574 https://gitee.com/openeuler/kernel/issues/I4DTUX Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit deb7178eb940e2c5caca1b1db084a69b2e59b4c9 upstream. fp is netdev private data and it cannot be used after free_netdev() call. Using fp after free_netdev() can cause UAF bug. Fix it by moving free_netdev() after error message. Fixes: 61414f5ec983 ("FDDI: defza: Add support for DEC FDDIcontroller 700 TURBOchannel adapter") Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> --- drivers/net/fddi/defza.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/fddi/defza.c b/drivers/net/fddi/defza.c index eaf85db53a5e..2e7d6cc16b2d 100644 --- a/drivers/net/fddi/defza.c +++ b/drivers/net/fddi/defza.c @@ -1504,9 +1504,8 @@ static int fza_probe(struct device *bdev) release_mem_region(start, len); err_out_kfree: - free_netdev(dev); - pr_err("%s: initialization failure, aborting!\n", fp->name); + free_netdev(dev); return ret; } -- 2.20.1