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btrfs: unlock extents in btrfs_zero_range in case of quota reservation errors
commit4f6a49de64
upstream. If btrfs_qgroup_reserve_data returns an error (i.e quota limit reached) the handling logic directly goes to the 'out' label without first unlocking the extent range between lockstart, lockend. This results in deadlocks as other processes try to lock the same extent. Fixes:a7f8b1c2ac
("btrfs: file: reserve qgroup space after the hole punch range is locked") CC: stable@vger.kernel.org # 5.10+ Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 4 additions and 1 deletions
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@ -3151,8 +3151,11 @@ static int btrfs_zero_range(struct inode *inode,
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goto out;
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ret = btrfs_qgroup_reserve_data(inode, &data_reserved,
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alloc_start, bytes_to_reserve);
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if (ret)
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if (ret) {
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unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart,
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lockend, &cached_state);
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goto out;
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}
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ret = btrfs_prealloc_file_range(inode, mode, alloc_start,
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alloc_end - alloc_start,
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i_blocksize(inode),
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