diff options
| author |   Andy Lutomirski <luto@kernel.org> | 2016-08-24 03:52:12 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2016-08-24 08:11:10 -0600 |
| commit | 9b47f77a680447e0132b2cf7fb82374e014bec1c (patch) | |
| tree | 378444caba4b1dd20784e870999ce67c1680997f /drivers/nvme | |
| parent | bdev: fix NULL pointer dereference (diff) | |
| download | linux-dev-9b47f77a680447e0132b2cf7fb82374e014bec1c.tar.xz linux-dev-9b47f77a680447e0132b2cf7fb82374e014bec1c.zip | |
nvme: Fix nvme_get/set_features() with a NULL result pointer
nvme_set_features() callers seem to expect that passing NULL as the
result pointer is acceptable. Teach nvme_set_features() not to try to
write to the NULL address.
For symmetry, make the same change to nvme_get_features(), despite the
fact that all current callers pass a valid result pointer.
I assume that this bug hasn't been reported in practice because
the callers that pass NULL are all in the SCSI translation layer
and no one uses the relevant operations.
Cc: stable@vger.kernel.org
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 7f75d661237f..2feacc70bf61 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -611,7 +611,7 @@ int nvme_get_features(struct nvme_ctrl *dev, unsigned fid, unsigned nsid, ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, NULL, 0, 0, NVME_QID_ANY, 0, 0); - if (ret >= 0) + if (ret >= 0 && result) *result = le32_to_cpu(cqe.result); return ret; } @@ -631,7 +631,7 @@ int nvme_set_features(struct nvme_ctrl *dev, unsigned fid, unsigned dword11, ret = __nvme_submit_sync_cmd(dev->admin_q, &c, &cqe, NULL, 0, 0, NVME_QID_ANY, 0, 0); - if (ret >= 0) + if (ret >= 0 && result) *result = le32_to_cpu(cqe.result); return ret; } |