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| author | Willem de Bruijn <[email protected]> | 2018-09-24 20:49:57 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2018-09-25 15:31:19 +0000 |
| commit | d0e13a1488ad30dc3c2c9347b931cb10f892e3a4 (patch) | |
| tree | 1a15d2fdf34411e490eb568710becbf156b97dac /tools/lib/bpf/libbpf.c | |
| parent | bpftool: add support for BPF_MAP_TYPE_REUSEPORT_SOCKARRAY maps (diff) | |
| download | kernel-d0e13a1488ad30dc3c2c9347b931cb10f892e3a4.tar.gz kernel-d0e13a1488ad30dc3c2c9347b931cb10f892e3a4.zip | |
flow_dissector: lookup netns by skb->sk if skb->dev is NULL
BPF flow dissectors are configured per network namespace.
__skb_flow_dissect looks up the netns through dev_net(skb->dev).
In some dissector paths skb->dev is NULL, such as for Unix sockets.
In these cases fall back to looking up the netns by socket.
Analyzing the codepaths leading to __skb_flow_dissect I did not find
a case where both skb->dev and skb->sk are NULL. Warn and fall back to
standard flow dissector if one is found.
Fixes: d58e468b1112 ("flow_dissector: implements flow dissector BPF hook")
Reported-by: Eric Dumazet <[email protected]>
Signed-off-by: Willem de Bruijn <[email protected]>
Acked-by: Song Liu <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Diffstat (limited to 'tools/lib/bpf/libbpf.c')
0 files changed, 0 insertions, 0 deletions