3.11.10.3 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Josh Durgin <josh.durgin@xxxxxxxxxxx>
commit c35455791c1131e7ccbf56ea6fbdd562401c2ce2 upstream.
The order parameter is sometimes NULL in _rbd_dev_v2_snap_size(), but
the dout() always derefences it. Move this to another dout() protected
by a check that order is non-NULL.
Signed-off-by: Josh Durgin <josh.durgin@xxxxxxxxxxx>
Reviewed-by: Sage Weil <sage@xxxxxxxxxxx>
Reviewed-by: Alex Elder <alex.elder@xxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/block/rbd.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 0ab2829..853e622 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3702,12 +3702,14 @@ static int _rbd_dev_v2_snap_size(struct rbd_device *rbd_dev, u64 snap_id,
if (ret < sizeof (size_buf))
return -ERANGE;
- if (order)
+ if (order) {
*order = size_buf.order;
+ dout(" order %u", (unsigned int)*order);
+ }
*snap_size = le64_to_cpu(size_buf.size);
- dout(" snap_id 0x%016llx order = %u, snap_size = %llu\n",
- (unsigned long long)snap_id, (unsigned int)*order,
+ dout(" snap_id 0x%016llx snap_size = %llu\n",
+ (unsigned long long)snap_id,
(unsigned long long)*snap_size);
return 0;
--
1.8.3.2
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