4.19-stable review patch. If anyone has any objections, please let me know.
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From: Xin Long lucien.xin@gmail.com
[ 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 yinxu@redhat.com Signed-off-by: Xin Long lucien.xin@gmail.com Acked-by: Neil Horman nhorman@tuxdriver.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/sctp/socket.c | 1 + 1 file changed, 1 insertion(+)
--- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1884,6 +1884,7 @@ static int sctp_sendmsg_check_sflags(str
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; }