Commit 68c94e55 authored by Nikolay Borisov's avatar Nikolay Borisov Committed by David Sterba

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: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 8e75fd89
...@@ -4040,8 +4040,8 @@ void close_ctree(struct btrfs_fs_info *fs_info) ...@@ -4040,8 +4040,8 @@ void close_ctree(struct btrfs_fs_info *fs_info)
btrfsic_unmount(fs_info->fs_devices); btrfsic_unmount(fs_info->fs_devices);
#endif #endif
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree); 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->dirty_metadata_bytes);
percpu_counter_destroy(&fs_info->delalloc_bytes); percpu_counter_destroy(&fs_info->delalloc_bytes);
......
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