diff options
| author | Josef Bacik <jbacik@fusionio.com> | 2013-05-31 21:04:36 +0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-06-08 23:07:53 +0400 |
| commit | a9995eece39a0630ebbfc1ab38570bce6c8a8f5b (patch) | |
| tree | 1dab3bca657f98015fed634bf08e2cc9742741f6 /fs | |
| parent | 6379ef9fb2482a92b5fe09f927d6ce1f989c0c6d (diff) | |
| download | linux-a9995eece39a0630ebbfc1ab38570bce6c8a8f5b.tar.xz | |
Btrfs: init relocate extent_io_tree with a mapping
Dave reported a NULL pointer deref. This is caused because he thought he'd be
smart and add sanity checks to the extent_io bit operations, but he didn't
expect a tree to have a NULL mapping. To fix this we just need to init the
relocation's processed_blocks with the btree_inode->i_mapping. Thanks,
Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/relocation.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 395b82031a42..4febca4fc2de 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -4082,7 +4082,7 @@ out: return inode; } -static struct reloc_control *alloc_reloc_control(void) +static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info) { struct reloc_control *rc; @@ -4093,7 +4093,8 @@ static struct reloc_control *alloc_reloc_control(void) INIT_LIST_HEAD(&rc->reloc_roots); backref_cache_init(&rc->backref_cache); mapping_tree_init(&rc->reloc_root_tree); - extent_io_tree_init(&rc->processed_blocks, NULL); + extent_io_tree_init(&rc->processed_blocks, + fs_info->btree_inode->i_mapping); return rc; } @@ -4110,7 +4111,7 @@ int btrfs_relocate_block_group(struct btrfs_root *extent_root, u64 group_start) int rw = 0; int err = 0; - rc = alloc_reloc_control(); + rc = alloc_reloc_control(fs_info); if (!rc) return -ENOMEM; @@ -4311,7 +4312,7 @@ int btrfs_recover_relocation(struct btrfs_root *root) if (list_empty(&reloc_roots)) goto out; - rc = alloc_reloc_control(); + rc = alloc_reloc_control(root->fs_info); if (!rc) { err = -ENOMEM; goto out; |