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| author | Josh Durgin <josh.durgin@inktank.com> | 2013-08-28 17:08:10 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:24:26 -0800 |
| commit | dd932ee7a2453d86c920d3bbd2938602c5c9aaca (patch) | |
| tree | 0577bef9a91c9d8bcef21589eff94826e7484538 /drivers/block | |
| parent | b33b7132f0feeb0716390330bd5d53fabe057f25 (diff) | |
| download | linux-3.10-dd932ee7a2453d86c920d3bbd2938602c5c9aaca.tar.gz linux-3.10-dd932ee7a2453d86c920d3bbd2938602c5c9aaca.tar.bz2 linux-3.10-dd932ee7a2453d86c920d3bbd2938602c5c9aaca.zip | |
rbd: fix null dereference in dout
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@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <alex.elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bb994872597..1d29dab42c0 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3712,12 +3712,14 @@ 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; |