tree 51a8e7832f2f0c851b7a592ef5e1215c86d163a3
parent 09a7636a5b151670072de60767ddf096dc7bd12e
author Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> 1467895169 -0300
committer David S. Miller <davem@davemloft.net> 1468037301 -0400

sctp: fix panic when sending auth chunks

When we introduced GSO support, if using auth the auth chunk was being
left queued on the packet even after the final segment was generated.
Later on sctp_transmit_packet it calls sctp_packet_reset, which zeroed
the packet len while not accounting for this left-over. This caused more
space to be used the next packet due to the chunk still being queued,
but space which wasn't allocated as its size wasn't accounted.

The fix is to only queue it back when we know that we are going to
generate another segment.

Fixes: 90017accff61 ("sctp: Add GSO support")
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>