btrfs: properly clear end of the unreserved range in cow_file_range

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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: a315e68f6e ("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>

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Christoph Hellwig 2023-07-24 06:26:55 -07:00 • committed by David Sterba

parent 5c25699871

commit 12b2d64e59

1 changed files with 5 additions and 5 deletions

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fs/btrfs/inode.c

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