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| author | Naohiro Aota <naohiro.aota@wdc.com> | 2017-08-25 05:15:14 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 07:44:03 (GMT) |
| commit | b86b6c226beafc28d5935ebb99590348cb48b633 (patch) | |
| tree | 55d7c2d0b4a843ddeae500186e33554c17f324d1 /fs/btrfs/relocation.c | |
| parent | bb1e06d281a82c75487fb7ddf25e540b82db4306 (diff) | |
| download | linux-b86b6c226beafc28d5935ebb99590348cb48b633.tar.xz | |
btrfs: fix NULL pointer dereference from free_reloc_roots()
commit bb166d7207432d3c7d10c45dc052f12ba3a2121d upstream.
__del_reloc_root should be called before freeing up reloc_root->node.
If not, calling __del_reloc_root() dereference reloc_root->node, causing
the system BUG.
Fixes: 6bdf131fac23 ("Btrfs: don't leak reloc root nodes on error")
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/btrfs/relocation.c')
| -rw-r--r-- | fs/btrfs/relocation.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 2cf5e14..04c61bc 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2367,11 +2367,11 @@ void free_reloc_roots(struct list_head *list) while (!list_empty(list)) { reloc_root = list_entry(list->next, struct btrfs_root, root_list); + __del_reloc_root(reloc_root); free_extent_buffer(reloc_root->node); free_extent_buffer(reloc_root->commit_root); reloc_root->node = NULL; reloc_root->commit_root = NULL; - __del_reloc_root(reloc_root); } } |