Xin Long a659254755 sctp: fix the issue that pathmtu may be set lower than MINSEGMENT ... After commit b6c5734db0 ("sctp: fix the handling of ICMP Frag Needed for too small MTUs"), sctp_transport_update_pmtu would refetch pathmtu from the dst and set it to transport's pathmtu without any check. The new pathmtu may be lower than MINSEGMENT if the dst is obsolete and updated by .get_dst() in sctp_transport_update_pmtu. In this case, it could have a smaller MTU as well, and thus we should validate it against MINSEGMENT instead. Syzbot reported a warning in sctp_mtu_payload caused by this. This patch refetches the pathmtu by calling sctp_dst_mtu where it does the check against MINSEGMENT. v1->v2: - refetch the pathmtu by calling sctp_dst_mtu instead as Marcelo's suggestion. Fixes: b6c5734db0 ("sctp: fix the handling of ICMP Frag Needed for too small MTUs") Reported-by: syzbot+f0d9d7cba052f9344b03@syzkaller.appspotmail.com Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-07-04 21:36:34 +09:00
..
associola.c
auth.c	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
bind_addr.c
chunk.c	sctp: fix erroneous inc of snmp SctpFragUsrMsgs	2018-06-21 12:49:33 +09:00
debug.c
diag.c
endpointola.c	treewide: Use struct_size() for kmalloc()-family	2018-06-06 11:15:43 -07:00
input.c
inqueue.c
ipv6.c	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
Kconfig
Makefile
objcnt.c
offload.c
output.c	sctp: define sctp_packet_gso_append to build GSO frames	2018-06-14 10:25:53 -07:00
outqueue.c
primitive.c
proc.c
protocol.c	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
sm_make_chunk.c
sm_sideeffect.c
sm_statefuns.c
sm_statetable.c
socket.c	Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL	2018-06-28 10:40:47 -07:00
stream_interleave.c
stream_sched_prio.c
stream_sched_rr.c
stream_sched.c
stream.c
sysctl.c
transport.c	sctp: fix the issue that pathmtu may be set lower than MINSEGMENT	2018-07-04 21:36:34 +09:00
tsnmap.c
ulpevent.c
ulpqueue.c