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Commit 9901c5d7 authored by John Fastabend's avatar John Fastabend Committed by Daniel Borkmann
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bpf: sockmap, fix crash when ipv6 sock is added



This fixes a crash where we assign tcp_prot to IPv6 sockets instead
of tcpv6_prot.

Previously we overwrote the sk->prot field with tcp_prot even in the
AF_INET6 case. This patch ensures the correct tcp_prot and tcpv6_prot
are used.

Tested with 'netserver -6' and 'netperf -H [IPv6]' as well as
'netperf -H [IPv4]'. The ESTABLISHED check resolves the previously
crashing case here.

Fixes: 174a79ff ("bpf: sockmap with sk redirect support")
Reported-by: default avatar <syzbot+5c063698bdbfac19f363@syzkaller.appspotmail.com>
Acked-by: default avatarMartin KaFai Lau <kafai@fb.com>
Signed-off-by: default avatarJohn Fastabend <john.fastabend@gmail.com>
Signed-off-by: default avatarWei Wang <weiwan@google.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent ca09cb04
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