Xin Long 096a8dca8c sctp: trim optlen when it's a huge value in sctp_setsockopt ... [ Upstream commit 2f3fdd8d4805015fa964807e1c7f3d88f31bd389 ] After commit ca84bd058d ("sctp: copy the optval from user space in sctp_setsockopt"), it does memory allocation in sctp_setsockopt with the optlen, and it would fail the allocation and return error if the optlen from user space is a huge value. This breaks some sockopts, like SCTP_HMAC_IDENT, SCTP_RESET_STREAMS and SCTP_AUTH_KEY, as when processing these sockopts before, optlen would be trimmed to a biggest value it needs when optlen is a huge value, instead of failing the allocation and returning error. This patch is to fix the allocation failure when it's a huge optlen from user space by trimming it to the biggest size sctp sockopt may need when necessary, and this biggest size is from sctp_setsockopt_reset_streams() for SCTP_RESET_STREAMS, which is bigger than those for SCTP_HMAC_IDENT and SCTP_AUTH_KEY. Fixes: ca84bd058d ("sctp: copy the optval from user space in sctp_setsockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-07-28 14:35:38 +02:00
..
associola.c
auth.c
bind_addr.c	sctp: validate from_addr_param return	2021-07-19 09:44:55 +02:00
chunk.c
debug.c
diag.c
endpointola.c
input.c	sctp: add size validation when walking chunks	2021-07-19 09:44:55 +02:00
inqueue.c
ipv6.c	sctp: validate from_addr_param return	2021-07-19 09:44:55 +02:00
Kconfig
Makefile
objcnt.c
offload.c
output.c
outqueue.c
primitive.c
proc.c
protocol.c	sctp: validate from_addr_param return	2021-07-19 09:44:55 +02:00
sm_make_chunk.c	sctp: validate from_addr_param return	2021-07-19 09:44:55 +02:00
sm_sideeffect.c
sm_statefuns.c	sctp: fix a SCTP_MIB_CURRESTAB leak in sctp_sf_do_dupcook_b	2021-05-19 10:13:06 +02:00
sm_statetable.c
socket.c	sctp: trim optlen when it's a huge value in sctp_setsockopt	2021-07-28 14:35:38 +02:00
stream_interleave.c
stream_sched_prio.c
stream_sched_rr.c
stream_sched.c
stream.c
sysctl.c
transport.c
tsnmap.c
ulpevent.c
ulpqueue.c