udf: Restore i_lenAlloc when inode expansion fails

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: 9788aff34d25 ("udf: Convert UDF to new truncate calling sequence")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index d6aa506b6b584020ebe2e722fb851c064cd85cfb..ea8f6cd01f501696cd276e58b8229af677283796 100644 (file)
--- 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);