netdev - Re: [PATCH net] sctp: call iov_iter

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Message-Id: <20190304.105930.1367812295017801292.davem@davemloft.net>
Date:   Mon, 04 Mar 2019 10:59:30 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, linux-sctp@...r.kernel.org,
        marcelo.leitner@...il.com, nhorman@...driver.com
Subject: Re: [PATCH net] sctp: call iov_iter_revert() after sending ABORT

From: Xin Long <lucien.xin@...il.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@...hat.com>
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied and queued up for -stable.