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| author | Minwoo Im <minwoo.im.dev@gmail.com> | 2017-11-24 21:03:00 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-11-28 19:49:26 +0300 |
| commit | 7e5dd57ef3081ff6c03908d786ed5087f6fbb7ae (patch) | |
| tree | 96909503a6a4b6a07c95daf553f27737532c8046 | |
| parent | eb1bd249ba016284ed762d87c1989dd822500773 (diff) | |
| download | linux-7e5dd57ef3081ff6c03908d786ed5087f6fbb7ae.tar.xz | |
nvme-pci: fix NULL pointer dereference in nvme_free_host_mem()
Following condition which will cause NULL pointer dereference will
occur in nvme_free_host_mem() when it tries to remove pci device via
nvme_remove() especially after a failure of host memory allocation for HMB.
"(host_mem_descs == NULL) && (nr_host_mem_descs != 0)"
It's because __nr_host_mem_descs__ is not cleared to 0 unlike
__host_mem_descs__ is so.
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/host/pci.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 617374762b7c..f5800c3c9082 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1759,6 +1759,7 @@ static void nvme_free_host_mem(struct nvme_dev *dev) dev->nr_host_mem_descs * sizeof(*dev->host_mem_descs), dev->host_mem_descs, dev->host_mem_descs_dma); dev->host_mem_descs = NULL; + dev->nr_host_mem_descs = 0; } static int __nvme_alloc_host_mem(struct nvme_dev *dev, u64 preferred, |