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block/nvme: nvme_process_completion() fix bound for cid 

NVMeQueuePair::reqs has length NVME_NUM_REQS, which less than
NVME_QUEUE_SIZE by 1.

Fixes: 1086e95da1 ("block/nvme: switch to a NVMeRequest freelist")
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Maksim Davydov <davydov-max@yandex-team.ru>
Message-id: 20231017125941.810461-5-vsementsov@yandex-team.ru
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
(cherry picked from commit cc8fb0c3ae)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Vladimir Sementsov-Ogievskiy 2023-11-06 15:00:28 +00:00 committed by Michael Tokarev
parent 26bb3ab8ff
commit 0d7c40a1e2
1 changed files with 4 additions and 3 deletions
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7
block/nvme.c
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@ -419,9 +419,10 @@ static bool nvme_process_completion(NVMeQueuePair *q)
q->cq_phase = !q->cq_phase;
}
cid = le16_to_cpu(c->cid);
if (cid == 0 || cid > NVME_QUEUE_SIZE) {
warn_report("NVMe: Unexpected CID in completion queue: %"PRIu32", "
"queue size: %u", cid, NVME_QUEUE_SIZE);
if (cid == 0 || cid > NVME_NUM_REQS) {
warn_report("NVMe: Unexpected CID in completion queue: %" PRIu32
", should be within: 1..%u inclusively", cid,
NVME_NUM_REQS);
continue;
}
trace_nvme_complete_command(s, q->index, cid);