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| author | Artem Savkov | 2016-07-21 13:32:04 +0200 |
|---|---|---|
| committer | Trond Myklebust | 2016-07-22 15:14:21 -0400 |
| commit | 297fae4d0bee5d683533f3324baf1b363e7b48bf (patch) | |
| tree | dcb38bff8298ea9cb0dd8bfcccb42d05c83372ba /mm/mmu_notifier.c | |
| parent | c77efc1e7884c818ba67ec36b08e220202d9428c (diff) | |
Fix NULL pointer dereference in bl_free_device().
When bl_parse_deviceid() fails in bl_alloc_deviceid_node() on
blkdev_get_by_*() step we get an pnfs_block_dev struct that is
uninitialized except for bdev field which is set to whatever error
blkdev_get_by_*() returns. bl_free_device() then tries to call
blkdev_put() if bdev is not 0 resulting in a wrong pointer dereference.
Fixing this by setting bdev in struct pnfs_block_dev only if we didn't
get an error from blkdev_get_by_*().
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'mm/mmu_notifier.c')
0 files changed, 0 insertions, 0 deletions