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| author | Filipe Manana <fdmanana@suse.com> | 2020-05-27 11:15:53 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-05-28 14:01:53 +0200 |
| commit | e2c8e92d1140754073ad3799eb6620c76bab2078 (patch) | |
| tree | 50e15443414ead3a23603bcae164af274c2eb317 /fs/btrfs | |
| parent | 213ff4b72a9c7509dd85979db64c66774f4f26c1 (diff) | |
| download | linux-e2c8e92d1140754073ad3799eb6620c76bab2078.tar.bz2 | |
btrfs: fix wrong file range cleanup after an error filling dealloc range
If an error happens while running dellaloc in COW mode for a range, we can
end up calling extent_clear_unlock_delalloc() for a range that goes beyond
our range's end offset by 1 byte, which affects 1 extra page. This results
in clearing bits and doing page operations (such as a page unlock) outside
our target range.
Fix that by calling extent_clear_unlock_delalloc() with an inclusive end
offset, instead of an exclusive end offset, at cow_file_range().
Fixes: a315e68f6e8b30 ("Btrfs: fix invalid attempt to free reserved space on failure to cow range")
CC: stable@vger.kernel.org # 4.14+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 4583f0763571..1b6cd937f214 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1141,7 +1141,7 @@ out_unlock: */ if (extent_reserved) { extent_clear_unlock_delalloc(inode, start, - start + cur_alloc_size, + start + cur_alloc_size - 1, locked_page, clear_bits, page_ops); |