linux-ext4 - [PATCH] unicode: add missing check for an error return from utf8lookup()

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Message-Id: <20190512085752.1791-1-tytso@mit.edu>
Date:   Sun, 12 May 2019 04:57:52 -0400
From:   "Theodore Ts'o" <tytso@....edu>
To:     Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:     "Theodore Ts'o" <tytso@....edu>,
        Gabriel Krisman Bertazi <krisman@...labora.com>
Subject: [PATCH] unicode: add missing check for an error return from utf8lookup()

Signed-off-by: Theodore Ts'o <tytso@....edu>
Cc: Gabriel Krisman Bertazi <krisman@...labora.com>
---
 fs/unicode/utf8-norm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/unicode/utf8-norm.c b/fs/unicode/utf8-norm.c
index 20d440c3f2db..801ed6d2ea37 100644
--- a/fs/unicode/utf8-norm.c
+++ b/fs/unicode/utf8-norm.c
@@ -714,6 +714,8 @@ int utf8byte(struct utf8cursor *u8c)
 			}
 
 			leaf = utf8lookup(u8c->data, u8c->hangul, u8c->s);
+			if (!leaf)
+				return -1;
 			ccc = LEAF_CCC(leaf);
 		}
 
-- 
2.19.1