Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Wed, 15 Feb 2017 22:41:40 +0000 | Subject | [PATCH 3.16 237/306] nvme/pci: Don't free queues on error |
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3.16.40-rc1 review patch. If anyone has any objections, please let me know.
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From: Keith Busch <keith.busch@intel.com>
commit d48756228ee9161ac8836b346589a43fabdc9f3c upstream.
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> Signed-off-by: Jens Axboe <axboe@fb.com> [bwh: Backported to 3.16: - Adjust filename, context - Only nvme_setup_io_queues() needs to be fixed] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -2196,7 +2196,7 @@ static int nvme_setup_io_queues(struct n result = queue_request_irq(dev, adminq, adminq->irqname); if (result) { adminq->q_suspended = 1; - goto free_queues; + return result; } /* Free previously allocated queues that are no longer usable */ @@ -2204,10 +2204,6 @@ static int nvme_setup_io_queues(struct n nvme_assign_io_queues(dev); return 0; - - free_queues: - nvme_free_queues(dev, 1); - return result; } /*
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