* [PATCH net] sctp: call iov_iter_revert() after sending ABORT
@ 2019-03-03 8:50 Xin Long
2019-03-04 12:09 ` Neil Horman
2019-03-04 18:59 ` David Miller
0 siblings, 2 replies; 3+ messages in thread
From: Xin Long @ 2019-03-03 8:50 UTC (permalink / raw)
To: network dev, linux-sctp; +Cc: davem, Marcelo Ricardo Leitner, Neil Horman
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>
---
net/sctp/socket.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 65d6d04..a2771b3 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1866,6 +1866,7 @@ 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;
}
--
2.1.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH net] sctp: call iov_iter_revert() after sending ABORT
2019-03-03 8:50 [PATCH net] sctp: call iov_iter_revert() after sending ABORT Xin Long
@ 2019-03-04 12:09 ` Neil Horman
2019-03-04 18:59 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: Neil Horman @ 2019-03-04 12:09 UTC (permalink / raw)
To: Xin Long; +Cc: network dev, linux-sctp, davem, Marcelo Ricardo Leitner
On Sun, Mar 03, 2019 at 04:50:26PM +0800, Xin Long wrote:
> 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>
> ---
> net/sctp/socket.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 65d6d04..a2771b3 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -1866,6 +1866,7 @@ 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;
> }
> --
> 2.1.0
>
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH net] sctp: call iov_iter_revert() after sending ABORT
2019-03-03 8:50 [PATCH net] sctp: call iov_iter_revert() after sending ABORT Xin Long
2019-03-04 12:09 ` Neil Horman
@ 2019-03-04 18:59 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2019-03-04 18:59 UTC (permalink / raw)
To: lucien.xin; +Cc: netdev, linux-sctp, marcelo.leitner, nhorman
From: Xin Long <lucien.xin@gmail.com>
Date: Sun, 3 Mar 2019 16:50:26 +0800
> 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>
Applied and queued up for -stable.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2019-03-03 8:50 [PATCH net] sctp: call iov_iter_revert() after sending ABORT Xin Long
2019-03-04 12:09 ` Neil Horman
2019-03-04 18:59 ` David Miller
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