[PATCH] hfsplus: don't use BUG_ON() in hfsplus_create_attributes_file()

[Tetsuo Handa]

syzkaller can mount crafted filesystem images.
Don't crash the kernel when we can continue.

Reported-by: syzbot <syzbot+1107451c16b9eb9d29e6@xxxxxxxxxxxxxxxxxxxxxxxxx>
Closes: https://syzkaller.appspot.com/bug?extid=1107451c16b9eb9d29e6
Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
---
 fs/hfsplus/xattr.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index 9a1a93e3888b..191767d4cf78 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -172,7 +172,11 @@ static int hfsplus_create_attributes_file(struct super_block *sb)
 		return PTR_ERR(attr_file);
 	}
 
-	BUG_ON(i_size_read(attr_file) != 0);
+	if (i_size_read(attr_file) != 0) {
+		err = -EIO;
+		pr_err("failed to load attributes file\n");
+		goto end_attr_file_creation;
+	}
 
 	hip = HFSPLUS_I(attr_file);
 
-- 
2.49.0