nvme-pci: fix out of bounds access in nvme_cqe_pending

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There is an out of bounds array access in nvme_cqe_peding().

When enable irq_thread for nvme interrupt, there is racing between the
nvmeq->cq_head updating and reading.

nvmeq->cq_head is updated in nvme_update_cq_head(), if nvmeq->cq_head
equals nvmeq->q_depth and before its value set to zero, nvme_cqe_pending()
uses its value as an array index, the index will be out of bounds.

Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
[hch: slight coding style update]
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Hongbo Yao 2019-01-07 10:22:07 +08:00 • committed by Christoph Hellwig

parent 8fae268b40

commit dcca166272

1 changed files with 3 additions and 1 deletions

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drivers/nvme/host/pci.c

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