From 83c7423d1eb6806d13c521d1002cc1a012111719 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 21 Dec 2022 17:45:51 +0100
Subject: [PATCH] udf: Fix extension of the last extent in the file
Git-commit: 83c7423d1eb6806d13c521d1002cc1a012111719
Patch-mainline: v6.2-rc3
References: bsc#1214964
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@suse.cz>
Acked-by: Jan Kara <jack@suse.cz>
---
fs/udf/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 1d7c2a812fc1..f3e988928d1d 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -595,7 +595,7 @@ 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;
--
2.35.3