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| author | Liu Bo <bo.li.liu@oracle.com> | 2016-06-06 22:01:23 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-06-17 19:32:40 +0300 |
| commit | c871b0f2fd27e7f9097d507f47de5270f88003b9 (patch) | |
| tree | 76635b17aa4948c8a8af7f9da1a3a8225ac2d518 /fs/btrfs/volumes.c | |
| parent | 16ff4b454f1b56e8d89a9075feed0dd6ac510c3d (diff) | |
| download | linux-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/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index fcbda4341f7d..c3a2900c6030 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6607,8 +6607,8 @@ int btrfs_read_sys_array(struct btrfs_root *root) * overallocate but we can keep it as-is, only the first page is used. */ sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET); - if (!sb) - return -ENOMEM; + if (IS_ERR(sb)) + return PTR_ERR(sb); set_extent_buffer_uptodate(sb); btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0); /* |