This is a note to let you know that I've just added the patch titled
udf: Fix extension of the last extent in the file
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
udf-fix-extension-of-the-last-extent-in-the-file.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6c5a87ab8ba62c5768392044c4c0101d1390ee5f
Author: Jan Kara <jack@xxxxxxx>
Date: Wed Dec 21 17:45:51 2022 +0100
udf: Fix extension of the last extent in the file
[ Upstream commit 83c7423d1eb6806d13c521d1002cc1a012111719 ]
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: 1f3868f06855 ("udf: Fix extending file within last block")
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index f6bbf395ce07..37a6bbd5a19c 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -602,7 +602,7 @@ 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;
