From ea8569194b43f0f01f0a84c689388542c7254a1f Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 18 Jan 2022 09:57:25 +0100
Subject: [PATCH] udf: Restore i_lenAlloc when inode expansion fails
Git-commit: ea8569194b43f0f01f0a84c689388542c7254a1f
Patch-mainline: v5.17-rc2
References: bsc#1195477

When we fail to expand inode from inline format to a normal format, we
restore inode to contain the original inline formatting but we forgot to
set i_lenAlloc back. The mismatch between i_lenAlloc and i_size was then
causing further problems such as warnings and lost data down the line.

Reported-by: butt3rflyh4ck <butterflyhuangxx@gmail.com>
Cc: stable@vger.kernel.org
Fixes: 7e49b6f2480c ("udf: Convert UDF to new truncate calling sequence")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Jan Kara <jack@suse.cz>

---
 fs/udf/inode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index d6aa506b6b58..ea8f6cd01f50 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -315,6 +315,7 @@ int udf_expand_file_adinicb(struct inode *inode)
 		unlock_page(page);
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
 		inode->i_data.a_ops = &udf_adinicb_aops;
+		iinfo->i_lenAlloc = inode->i_size;
 		up_write(&iinfo->i_data_sem);
 	}
 	put_page(page);
-- 
2.31.1