From 8085d6d03fe3702e9cf37fff3677c08b40b1007f Mon Sep 17 00:00:00 2001 From: Xin Long Date: Sun, 3 Mar 2019 16:50:26 +0800 Subject: sctp: call iov_iter_revert() after sending ABORT [ Upstream commit 901efe12318b1ea8d3e2c88a7b75ed6e6d5d7245 ] The user msg is also copied to the abort packet when doing SCTP_ABORT in sctp_sendmsg_check_sflags(). When SCTP_SENDALL is set, iov_iter_revert() should have been called for sending abort on the next asoc with copying this msg. Otherwise, memcpy_from_msg() in sctp_make_abort_user() will fail and return error. Fixes: 4910280503f3 ("sctp: add support for snd flag SCTP_SENDALL process in sendmsg") Reported-by: Ying Xu Signed-off-by: Xin Long Acked-by: Neil Horman Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/sctp/socket.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/sctp') diff --git a/net/sctp/socket.c b/net/sctp/socket.c index e5e70cff5bb3..1b16250c5718 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1884,6 +1884,7 @@ static int sctp_sendmsg_check_sflags(struct sctp_association *asoc, pr_debug("%s: aborting association:%p\n", __func__, asoc); sctp_primitive_ABORT(net, asoc, chunk); + iov_iter_revert(&msg->msg_iter, msg_len); return 0; } -- cgit v1.2.3