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ext4: treat end of range as exclusive in ext4_zero_range()

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[ Upstream commit 9257336914 ]

The call to filemap_write_and_wait_range() assumes the range passed to be
inclusive, so fix the call to make sure we follow that.

Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/e503107a7c73a2b68dec645c5ad798c437717c45.1698856309.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ojaswin Mujoo 2023-11-01 22:08:10 +05:30 committed by Greg Kroah-Hartman
parent 69c7eeb4f6
commit d91ecb894a
1 changed files with 4 additions and 2 deletions
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6
fs/ext4/extents.c
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@ -4522,7 +4522,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
* Round up offset. This is not fallocate, we need to zero out
* blocks, so convert interior block aligned part of the range to
* unwritten and possibly manually zero out unaligned parts of the
* range.
* range. Here, start and partial_begin are inclusive, end and
* partial_end are exclusive.
*/
start = round_up(offset, 1 << blkbits);
end = round_down((offset + len), 1 << blkbits);
@ -4608,7 +4609,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
* disk in case of crash before zeroing trans is committed.
*/
if (ext4_should_journal_data(inode)) {
ret = filemap_write_and_wait_range(mapping, start, end);
ret = filemap_write_and_wait_range(mapping, start,
end - 1);
if (ret) {
filemap_invalidate_unlock(mapping);
goto out_mutex;