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| 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/tree-log.c | |
| parent | 16ff4b454f1b56e8d89a9075feed0dd6ac510c3d (diff) | |
| download | op-kernel-dev-c871b0f2fd27e7f9097d507f47de5270f88003b9.zip op-kernel-dev-c871b0f2fd27e7f9097d507f47de5270f88003b9.tar.gz | |
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/tree-log.c')
| -rw-r--r-- | fs/btrfs/tree-log.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index aa8fed1..8ab1dc6 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2422,8 +2422,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, root_owner = btrfs_header_owner(parent); next = btrfs_find_create_tree_block(root, bytenr); - if (!next) - return -ENOMEM; + if (IS_ERR(next)) + return PTR_ERR(next); if (*level == 1) { ret = wc->process_func(root, next, wc, ptr_gen); |
