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netfilter: nfnetlink: fix potential dead lock in nfnetlink_rcv_msg()
authorZiyang Xuan <william.xuanziyang@huawei.com>
Thu, 3 Nov 2022 01:12:02 +0000 (09:12 +0800)
committerFlorian Westphal <fw@strlen.de>
Tue, 8 Nov 2022 22:16:13 +0000 (23:16 +0100)
commit0507cdd7b6c6cd2659703bcca5c9eaa564f6b943
treeecad606f2999f189c3f00c6bf9a2ad74ddae999etree | snapshot
parenta974b7d103b11219aa14c060563903c6eb8f0816commit | diff
netfilter: nfnetlink: fix potential dead lock in nfnetlink_rcv_msg()

When type is NFNL_CB_MUTEX and -EAGAIN error occur in nfnetlink_rcv_msg(),
it does not execute nfnl_unlock(). That would trigger potential dead lock.

Fixes: d88d1ad25045 ("netfilter: nfnetlink: consolidate callback types")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
net/netfilter/nfnetlink.c diff | blob | history
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