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nvme/pci: Don't free queues on error 

The nvme_remove function tears down all allocated resources in the correct
order, so no need to free queues on error during initialization. This
fixes possible use-after-free errors when queues are still associated
with a blk-mq hctx.

Reported-by: Scott Bauer <scott.bauer@intel.com>
Tested-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimbeg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2016-11-15 15:56:26 -05:00 committed by Jens Axboe
parent 959401aa2b
commit d48756228e
1 changed files with 4 additions and 14 deletions
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18
drivers/nvme/host/pci.c
View File

@ -1242,20 +1242,16 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
result = nvme_enable_ctrl(&dev->ctrl, cap);
if (result)
goto free_nvmeq;
return result;
nvmeq->cq_vector = 0;
result = queue_request_irq(nvmeq);
if (result) {
nvmeq->cq_vector = -1;
goto free_nvmeq;
return result;
}
return result;
free_nvmeq:
nvme_free_queues(dev, 0);
return result;
}
static bool nvme_should_reset(struct nvme_dev *dev, u32 csts)
@ -1317,10 +1313,8 @@ static int nvme_create_io_queues(struct nvme_dev *dev)
max = min(dev->max_qid, dev->queue_count - 1);
for (i = dev->online_queues; i <= max; i++) {
ret = nvme_create_queue(dev->queues[i], i);
if (ret) {
nvme_free_queues(dev, i);
if (ret)
break;
}
}
/*
@ -1460,13 +1454,9 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
result = queue_request_irq(adminq);
if (result) {
adminq->cq_vector = -1;
goto free_queues;
return result;
}
return nvme_create_io_queues(dev);
free_queues:
nvme_free_queues(dev, 1);
return result;
}
static void nvme_del_queue_end(struct request *req, int error)