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rbd: Clear ceph_msg->bio_iter for retransmitted message

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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>
(cherry picked from commit 43643528cc)
This commit is contained in:
Yan, Zheng 2012-06-06 19:35:55 -05:00 • committed by Alex Elder
parent 88ed6ea0b2
commit b132cf4c73
1 changed files with 4 additions and 0 deletions
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4
net/ceph/messenger.c
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@ -563,6 +563,10 @@ static void prepare_write_message(struct ceph_connection *con)
m->hdr.seq = cpu_to_le64(++con->out_seq); m->hdr.seq = cpu_to_le64(++con->out_seq);
m->needs_out_seq = false; 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", 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), m, con->out_seq, le16_to_cpu(m->hdr.type),