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nvmet-rdma: Fix use after free 

Avoid dereferencing the queue pointer in nvmet_rdma_release_queue_work()
after it has been freed by nvmet_rdma_free_queue().

Fixes: d8f7750a08 ("nvmet-rdma: Correctly handle RDMA device hot removal")
Signed-off-by: Vincent Stehlé <vincent.stehle@intel.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
Vincent Stehlé 2016-08-16 15:11:25 +02:00 committed by Sagi Grimberg
parent 39bbee4e54
commit 3256aaef5e
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/target/rdma.c
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@ -978,10 +978,11 @@ static void nvmet_rdma_release_queue_work(struct work_struct *w)
container_of(w, struct nvmet_rdma_queue, release_work);
struct rdma_cm_id *cm_id = queue->cm_id;
struct nvmet_rdma_device *dev = queue->dev;
enum nvmet_rdma_queue_state state = queue->state;
nvmet_rdma_free_queue(queue);
if (queue->state != NVMET_RDMA_IN_DEVICE_REMOVAL)
if (state != NVMET_RDMA_IN_DEVICE_REMOVAL)
rdma_destroy_id(cm_id);
kref_put(&dev->ref, nvmet_rdma_free_dev);