Messages in this thread Patch in this message | | | Date | Tue, 17 Jan 2023 00:57:19 +0100 | From | Piergiorgio Beruto <> | Subject | [PATCH net-next 1/1] ethtool/plca: fix potential NULL pointer access |
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Fix problem found by syzbot dereferencing a device pointer.
Signed-off-by: Piergiorgio Beruto <piergiorgio.beruto@gmail.com> Reported-by: syzbot+8cf35743af243e5f417e@syzkaller.appspotmail.com Fixes: 8580e16c28f3 ("net/ethtool: add netlink interface for the PLCA RS") --- net/ethtool/plca.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/ethtool/plca.c b/net/ethtool/plca.c index be7404dc9ef2..bc3d31f99998 100644 --- a/net/ethtool/plca.c +++ b/net/ethtool/plca.c @@ -155,6 +155,8 @@ int ethnl_set_plca_cfg(struct sk_buff *skb, struct genl_info *info) return ret; dev = req_info.dev; + if(!dev) + return -ENODEV; rtnl_lock(); -- 2.37.4
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