3.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: "Yan, Zheng" <zheng.z....@intel.com>
(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 <zheng.z....@intel.com>
Reviewed-by: Alex Elder <el...@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
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),
--
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