Messages in this thread Patch in this message | | | From | Igor Artemiev <> | Subject | [lvc-project] [PATCH] netfilter: nfnetlink: NULL-check skb->dev in __build_packet_message() | Date | Mon, 27 Mar 2023 12:41:16 +0300 |
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After having been compared to NULL value at nfnetlink_log.c:560, pointer 'skb->dev' is dereferenced at nfnetlink_log.c:576.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Signed-off-by: Igor Artemiev <Igor.A.Artemiev@mcst.ru> --- net/netfilter/nfnetlink_log.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c index d97eb280cb2e..2711509eb9a5 100644 --- a/net/netfilter/nfnetlink_log.c +++ b/net/netfilter/nfnetlink_log.c @@ -572,7 +572,7 @@ __build_packet_message(struct nfnl_log_net *log, } } - if (indev && skb_mac_header_was_set(skb)) { + if (indev && skb->dev && skb_mac_header_was_set(skb)) { if (nla_put_be16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)) || nla_put_be16(inst->skb, NFULA_HWLEN, htons(skb->dev->hard_header_len))) -- 2.30.2
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