nvme-pci: fix out of bounds access in nvme_cqe_pending
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>
parent
8fae268b
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