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authorPaolo Abeni <pabeni@redhat.com>2018-11-07 12:38:33 +0100
committerDavid S. Miller <davem@davemloft.net>2018-11-07 16:23:05 -0800
commitcf329aa42b6659204fee865bbce0ea20462552eb (patch)
treea77ca02d32c95a4bcb22ba09917bc6e1edade2c5 /tools
parentipv6: factor out protocol delivery helper (diff)
downloadlinux-dev-cf329aa42b6659204fee865bbce0ea20462552eb.tar.xz
linux-dev-cf329aa42b6659204fee865bbce0ea20462552eb.zip
udp: cope with UDP GRO packet misdirection
In some scenarios, the GRO engine can assemble an UDP GRO packet that ultimately lands on a non GRO-enabled socket. This patch tries to address the issue explicitly checking for the UDP socket features before enqueuing the packet, and eventually segmenting the unexpected GRO packet, as needed. We must also cope with re-insertion requests: after segmentation the UDP code calls the helper introduced by the previous patches, as needed. Segmentation is performed by a common helper, which takes care of updating socket and protocol stats is case of failure. rfc v3 -> v1 - fix compile issues with rxrpc - when gso_segment returns NULL, treat is as an error - added 'ipv4' argument to udp_rcv_segment() rfc v2 -> rfc v3 - moved udp_rcv_segment() into net/udp.h, account errors to socket and ns, always return NULL or segs list Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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