Commit 2b084d82 authored by Haisu Wang's avatar Haisu Wang Committed by David Sterba
Browse files

btrfs: fix the length of reserved qgroup to free 



The dealloc flag may be cleared and the extent won't reach the disk in
cow_file_range when errors path. The reserved qgroup space is freed in
commit 30479f31 ("btrfs: fix qgroup reserve leaks in
cow_file_range"). However, the length of untouched region to free needs
to be adjusted with the correct remaining region size.

Fixes: 30479f31 ("btrfs: fix qgroup reserve leaks in cow_file_range")
CC: stable@vger.kernel.org # 6.11+
Reviewed-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarBoris Burkov <boris@bur.io>
Signed-off-by: default avatarHaisu Wang <haisuwang@tencent.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent c9a75ec4

fs/btrfs/inode.c

+1 −1
Original line number Diff line number Diff line
@@ -1618,7 +1618,7 @@ static noinline int cow_file_range(struct btrfs_inode *inode, 
		clear_bits |= EXTENT_CLEAR_DATA_RESV;

		extent_clear_unlock_delalloc(inode, start, end, locked_folio,

					     &cached, clear_bits, page_ops);

		btrfs_qgroup_free_data(inode, NULL, start, cur_alloc_size, NULL);

		btrfs_qgroup_free_data(inode, NULL, start, end - start + 1, NULL);

	}

	return ret;

}