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(parent: e931963) | patch
netfilter: nfnetlink_osf: Fix a missing skb_header_pointer() NULL check
authorPablo Neira Ayuso <pablo@netfilter.org>
Wed, 5 May 2021 20:25:24 +0000 (22:25 +0200)
committerPablo Neira Ayuso <pablo@netfilter.org>
Wed, 5 May 2021 20:26:09 +0000 (22:26 +0200)
commitdb5040bf5f8901f7382c93786635e63ba4ce1440
treef0c342e641912b5e6e41e0965971f1410bc2a44ctree | snapshot
parente931963e929187f49027d56ae019f8ed68658bd2commit | diff
netfilter: nfnetlink_osf: Fix a missing skb_header_pointer() NULL check

Do not assume that the tcph->doff field is correct when parsing for TCP
options, skb_header_pointer() might fail to fetch these bits.

Fixes: 82f337bd3ffb ("netfilter: passive OS fingerprint xtables match")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
net/netfilter/nfnetlink_osf.c diff | blob | history
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