diff options
| author | Christoph Hellwig <hch@lst.de> | 2023-07-24 06:26:55 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2023-08-10 17:07:10 +0200 |
| commit | 12b2d64e591652a2d97dd3afa2b062ca7a4ba352 (patch) | |
| tree | 386b24a2e723f1e7411ca4b0a7bcb631125a60f1 | |
| parent | 5c25699871112853f231e52d51c576d5c759a020 (diff) | |
| download | linux-12b2d64e591652a2d97dd3afa2b062ca7a4ba352.tar.gz | |
btrfs: properly clear end of the unreserved range in cow_file_range
When the call to btrfs_reloc_clone_csums in cow_file_range returns an
error, we jump to the out_unlock label with the extent_reserved variable
set to false. The cleanup at the label will then call
extent_clear_unlock_delalloc on the range from start to end. But we've
already added cur_alloc_size to start before the jump, so there might no
range be left from the newly incremented start to end. Move the check for
'start < end' so that it is reached by also for the !extent_reserved case.
CC: stable@vger.kernel.org # 6.1+
Fixes: a315e68f6e8b ("Btrfs: fix invalid attempt to free reserved space on failure to cow range")
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/inode.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 49cef61f6a39f..9055e19b01ef1 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1654,8 +1654,6 @@ out_unlock: clear_bits, page_ops); start += cur_alloc_size; - if (start >= end) - return ret; } /* @@ -1664,9 +1662,11 @@ out_unlock: * space_info's bytes_may_use counter, reserved in * btrfs_check_data_free_space(). */ - extent_clear_unlock_delalloc(inode, start, end, locked_page, - clear_bits | EXTENT_CLEAR_DATA_RESV, - page_ops); + if (start < end) { + clear_bits |= EXTENT_CLEAR_DATA_RESV; + extent_clear_unlock_delalloc(inode, start, end, locked_page, + clear_bits, page_ops); + } return ret; } |