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udf: Fix extension of the last extent in the file 

[ Upstream commit 83c7423d1e ]

When extending the last extent in the file within the last block, we
wrongly computed the length of the last extent. This is mostly a
cosmetical problem since the extent does not contain any data and the
length will be fixed up by following operations but still.

Fixes: 1f3868f068 ("udf: Fix extending file within last block")
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jan Kara 2022-12-21 17:45:51 +01:00 committed by Greg Kroah-Hartman
parent 3ad47c8aa5
commit 2d1dbb030c
1 changed files with 1 additions and 1 deletions
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2
fs/udf/inode.c
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@ -600,7 +600,7 @@ static void udf_do_extend_final_block(struct inode *inode,
*/
if (new_elen <= (last_ext->extLength & UDF_EXTENT_LENGTH_MASK))
return;
added_bytes = (last_ext->extLength & UDF_EXTENT_LENGTH_MASK) - new_elen;
added_bytes = new_elen - (last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
last_ext->extLength += added_bytes;
UDF_I(inode)->i_lenExtents += added_bytes;