From: Jan Kara <jack@suse.cz>
Date: Thu, 15 Dec 2022 14:24:03 +0100
Subject: [PATCH] udf: Truncate added extents on failed expansion
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 70bfb3a8d661d4fdc742afc061b88a7f3fc9f500

commit 70bfb3a8d661d4fdc742afc061b88a7f3fc9f500 upstream.

When a file expansion failed because we didn't have enough space for
indirect extents make sure we truncate extents created so far so that we
don't leave extents beyond EOF.

CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/udf/inode.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 34e41632..8f5f9314 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -521,8 +521,10 @@ static int udf_do_extend_file(struct inode *inode,
 	}
 
 	if (fake) {
-		udf_add_aext(inode, last_pos, &last_ext->extLocation,
-			     last_ext->extLength, 1);
+		err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
+				   last_ext->extLength, 1);
+		if (err < 0)
+			goto out_err;
 		count++;
 	} else {
 		struct kernel_lb_addr tmploc;
@@ -556,7 +558,7 @@ static int udf_do_extend_file(struct inode *inode,
 		err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
 				   last_ext->extLength, 1);
 		if (err)
-			return err;
+			goto out_err;
 		count++;
 	}
 	if (new_block_bytes) {
@@ -565,7 +567,7 @@ static int udf_do_extend_file(struct inode *inode,
 		err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
 				   last_ext->extLength, 1);
 		if (err)
-			return err;
+			goto out_err;
 		count++;
 	}
 
@@ -579,6 +581,11 @@ static int udf_do_extend_file(struct inode *inode,
 		return -EIO;
 
 	return count;
+out_err:
+	/* Remove extents we've created so far */
+	udf_clear_extent_cache(inode);
+	udf_truncate_extents(inode);
+	return err;
 }
 
 /* Extend the final block of the file to final_block_len bytes */
-- 
2.35.3