From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Zheng Yan , Alex Elder Subject: [ 085/171] rbd: Clear ceph_msg->bio_iter for retransmitted message Date: Wed, 21 Nov 2012 16:40:31 -0800 Message-Id: <20121122004041.901216074@linuxfoundation.org> In-Reply-To: <20121122004033.298367941@linuxfoundation.org> References: <20121122004033.298367941@linuxfoundation.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: "Yan, Zheng" (cherry picked from commit 43643528cce60ca184fe8197efa8e8da7c89a037) (cherry picked from commit b132cf4c733f91bb4dd2277ea049243cf16e8b66) The bug can cause NULL pointer dereference in write_partial_msg_pages Signed-off-by: Zheng Yan Reviewed-by: Alex Elder Signed-off-by: Greg Kroah-Hartman --- net/ceph/messenger.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -563,6 +563,10 @@ static void prepare_write_message(struct m->hdr.seq = cpu_to_le64(++con->out_seq); m->needs_out_seq = false; } +#ifdef CONFIG_BLOCK + else + m->bio_iter = NULL; +#endif dout("prepare_write_message %p seq %lld type %d len %d+%d+%d %d pgs\n", m, con->out_seq, le16_to_cpu(m->hdr.type),