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nvmet: always initialize cqe.result 

[ Upstream commit cd0c1b8e045a8d2785342b385cb2684d9b48e426 ]

The spec doesn't mandate that the first two double words (aka results)
for the command queue entry need to be set to 0 when they are not
used (not specified). Though, the target implemention returns 0 for TCP
and FC but not for RDMA.

Let's make RDMA behave the same and thus explicitly initializing the
result field. This prevents leaking any data from the stack.

Signed-off-by: Daniel Wagner <dwagner@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Wagner 2024-06-12 16:11:59 +02:00 committed by Greg Kroah-Hartman
parent ae84383c96
commit 10967873b8
3 changed files with 1 additions and 9 deletions
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1
drivers/nvme/target/core.c
View File

@ -945,6 +945,7 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq,
req->metadata_sg_cnt = 0;
req->transfer_len = 0;
req->metadata_len = 0;
req->cqe->result.u64 = 0;
req->cqe->status = 0;
req->cqe->sq_head = 0;
req->ns = NULL;

3
drivers/nvme/target/fabrics-cmd-auth.c
View File

@ -332,7 +332,6 @@ done:
pr_debug("%s: ctrl %d qid %d nvme status %x error loc %d\n",
__func__, ctrl->cntlid, req->sq->qid,
status, req->error_loc);
req->cqe->result.u64 = 0;
if (req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2 &&
req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_FAILURE2) {
unsigned long auth_expire_secs = ctrl->kato ? ctrl->kato : 120;
@ -515,8 +514,6 @@ void nvmet_execute_auth_receive(struct nvmet_req *req)
status = nvmet_copy_to_sgl(req, 0, d, al);
kfree(d);
done:
req->cqe->result.u64 = 0;
if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2)
nvmet_auth_sq_free(req->sq);
else if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_FAILURE1) {

6
drivers/nvme/target/fabrics-cmd.c
View File

@ -225,9 +225,6 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req)
if (status)
goto out;
/* zero out initial completion result, assign values as needed */
req->cqe->result.u32 = 0;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));
@ -305,9 +302,6 @@ static void nvmet_execute_io_connect(struct nvmet_req *req)
if (status)
goto out;
/* zero out initial completion result, assign values as needed */
req->cqe->result.u32 = 0;
if (c->recfmt != 0) {
pr_warn("invalid connect version (%d).\n",
le16_to_cpu(c->recfmt));