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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2012-06-06 19:35:55 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-11-26 11:38:09 -0800 |
| commit | 576e428b246271f0f078079c68a9f11679c7db8a (patch) | |
| tree | 147e2fb1c6899ddda780f84196581c6f6c0cba2a | |
| parent | acecca48781a79040dca822cf96d505904c282c3 (diff) | |
| download | lwn-576e428b246271f0f078079c68a9f11679c7db8a.tar.gz lwn-576e428b246271f0f078079c68a9f11679c7db8a.zip | |
rbd: Clear ceph_msg->bio_iter for retransmitted message
(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.yan@intel.com>
Reviewed-by: Alex Elder <elder@inktank.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ceph/messenger.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 1a80907282cc..375ae3953e25 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -563,6 +563,10 @@ static void prepare_write_message(struct ceph_connection *con) 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), |