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| author | Bart Van Assche <bvanassche@acm.org> | 2018-10-08 14:28:46 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-10-17 08:58:29 +0200 |
| commit | 0d2bdf9f4134582bc7c4b82cb516cb27952127d0 (patch) | |
| tree | 4eeccf6e4311a005ff3123712d4c2d499b3720b5 /drivers/nvme | |
| parent | d3d0bc78be300098104d9fde9ca1330694a70f45 (diff) | |
| download | lwn-0d2bdf9f4134582bc7c4b82cb516cb27952127d0.tar.gz lwn-0d2bdf9f4134582bc7c4b82cb516cb27952127d0.zip | |
nvme-fc: rework the request initialization code
Instead of setting and then clearing the first_sgl pointer for AEN requests,
leave that pointer zero. This patch does not change how requests are
initialized but avoids that Coverity reports the following complaint for
nvme_fc_init_aen_ops():
CID 1418400 (#1 of 1): Out-of-bounds access (OVERRUN)
4. overrun-buffer-val: Overrunning buffer pointed to by aen_op of 312 bytes by passing it to a function which accesses it at byte offset 312.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/fc.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index fdadc9464f6f..e52b9d3c0bd6 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -1704,7 +1704,6 @@ __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl, op->fcp_req.rspaddr = &op->rsp_iu; op->fcp_req.rsplen = sizeof(op->rsp_iu); op->fcp_req.done = nvme_fc_fcpio_done; - op->fcp_req.first_sgl = &op_w_sgl->sgl[0]; op->fcp_req.private = &op->fcp_req.first_sgl[SG_CHUNK_SIZE]; op->ctrl = ctrl; op->queue = queue; @@ -1746,9 +1745,14 @@ nvme_fc_init_request(struct blk_mq_tag_set *set, struct request *rq, struct nvme_fcp_op_w_sgl *op = blk_mq_rq_to_pdu(rq); int queue_idx = (set == &ctrl->tag_set) ? hctx_idx + 1 : 0; struct nvme_fc_queue *queue = &ctrl->queues[queue_idx]; + int res; nvme_req(rq)->ctrl = &ctrl->ctrl; - return __nvme_fc_init_request(ctrl, queue, &op->op, rq, queue->rqcnt++); + res = __nvme_fc_init_request(ctrl, queue, &op->op, rq, queue->rqcnt++); + if (res) + return res; + op->op.fcp_req.first_sgl = &op->sgl[0]; + return res; } static int @@ -1778,7 +1782,6 @@ nvme_fc_init_aen_ops(struct nvme_fc_ctrl *ctrl) } aen_op->flags = FCOP_FLAGS_AEN; - aen_op->fcp_req.first_sgl = NULL; /* no sg list */ aen_op->fcp_req.private = private; memset(sqe, 0, sizeof(*sqe)); |