path: root/net/dccp/ipv4.c
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authorWillem de Bruijn <willemb@google.com>2016-07-12 18:18:56 -0400
committerDavid S. Miller <davem@davemloft.net>2016-07-13 11:53:40 -0700
commitf4979fcea7fd36d8e2f556abef86f80e0d5af1ba (patch)
treee44115be36c8eef0769d4defe66168635c64137a /net/dccp/ipv4.c
parentMerge branch 'mlx5-fixes' (diff)
rose: limit sk_filter trim to payload
Sockets can have a filter program attached that drops or trims incoming packets based on the filter program return value. Rose requires data packets to have at least ROSE_MIN_LEN bytes. It verifies this on arrival in rose_route_frame and unconditionally pulls the bytes in rose_recvmsg. The filter can trim packets to below this value in-between, causing pull to fail, leaving the partial header at the time of skb_copy_datagram_msg. Place a lower bound on the size to which sk_filter may trim packets by introducing sk_filter_trim_cap and call this for rose packets. Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ipv4.c')
0 files changed, 0 insertions, 0 deletions