diff options
| author | Liu Bo <bo.li.liu@oracle.com> | 2016-06-06 12:01:23 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-06-17 18:32:40 +0200 |
| commit | c871b0f2fd27e7f9097d507f47de5270f88003b9 (patch) | |
| tree | 76635b17aa4948c8a8af7f9da1a3a8225ac2d518 /fs/btrfs/extent-tree.c | |
| parent | 16ff4b454f1b56e8d89a9075feed0dd6ac510c3d (diff) | |
| download | linux-0-day-c871b0f2fd27e7f9097d507f47de5270f88003b9.tar.gz linux-0-day-c871b0f2fd27e7f9097d507f47de5270f88003b9.tar.xz | |
Btrfs: check if extent buffer is aligned to sectorsize
Thanks to fuzz testing, we can pass an invalid bytenr to extent buffer
via alloc_extent_buffer(). An unaligned eb can have more pages than it
should have, which ends up extent buffer's leak or some corrupted content
in extent buffer.
This adds a warning to let us quickly know what was happening.
Now that alloc_extent_buffer() no more returns NULL, this changes its
caller and callers of its caller to match with the new error
handling.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 689d25ac6a681..5439e85c4813f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -8016,8 +8016,9 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct extent_buffer *buf; buf = btrfs_find_create_tree_block(root, bytenr); - if (!buf) - return ERR_PTR(-ENOMEM); + if (IS_ERR(buf)) + return buf; + btrfs_set_header_generation(buf, trans->transid); btrfs_set_buffer_lockdep_class(root->root_key.objectid, buf, level); btrfs_tree_lock(buf); @@ -8659,8 +8660,9 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans, next = btrfs_find_tree_block(root->fs_info, bytenr); if (!next) { next = btrfs_find_create_tree_block(root, bytenr); - if (!next) - return -ENOMEM; + if (IS_ERR(next)) + return PTR_ERR(next); + btrfs_set_buffer_lockdep_class(root->root_key.objectid, next, level - 1); reada = 1; |