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| author | Nikolay Borisov <nborisov@suse.com> | 2019-02-12 15:13:14 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-04-29 19:02:37 +0200 |
| commit | 68c94e55e1502868813a3cac2febc021d01edb75 (patch) | |
| tree | 07b0803b3cb0c9c614a541d4d8e42378bc22f479 | |
| parent | btrfs: Stop using call_rcu for device freeing (diff) | |
| download | linux-68c94e55e1502868813a3cac2febc021d01edb75.tar.xz linux-68c94e55e1502868813a3cac2febc021d01edb75.zip | |
btrfs: Transpose btrfs_close_devices/btrfs_mapping_tree_free in close_ctree
Following the introduction of the alloc_state tree, some of the callees
of btrfs_mapping_tree_free will have to interact with the btrfs_device
of the constituent devices. Enable this by moving the code responsible
for freeing devices after the last user (btrfs_mapping_tree_free).
Otherwise the kernel could crash due to use-after-free.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/disk-io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index de1dcccc7c9d..8c10702a3f83 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -4040,8 +4040,8 @@ void close_ctree(struct btrfs_fs_info *fs_info) btrfsic_unmount(fs_info->fs_devices); #endif - btrfs_close_devices(fs_info->fs_devices); btrfs_mapping_tree_free(&fs_info->mapping_tree); + btrfs_close_devices(fs_info->fs_devices); percpu_counter_destroy(&fs_info->dirty_metadata_bytes); percpu_counter_destroy(&fs_info->delalloc_bytes); |