linux-kernel - [PATCH] nvmem: fix possible integer overflow in nintendo_otp_reg

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20220708065346.30727-1-hbh25y@gmail.com>
Date:   Fri,  8 Jul 2022 14:53:46 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     srinivas.kandagatla@...aro.org
Cc:     linux-kernel@...r.kernel.org, Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH] nvmem: fix possible integer overflow in nintendo_otp_reg_read()

bytes of type size_t is passed to words of type int in
nintendo_otp_reg_read. This can lead to integer overflow.

Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 drivers/nvmem/nintendo-otp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/nintendo-otp.c b/drivers/nvmem/nintendo-otp.c
index 33961b17f9f1..eb614c31a6b4 100644
--- a/drivers/nvmem/nintendo-otp.c
+++ b/drivers/nvmem/nintendo-otp.c
@@ -50,7 +50,7 @@ static int nintendo_otp_reg_read(void *context,
 {
 	struct nintendo_otp_priv *priv = context;
 	u32 *val = _val;
-	int words = bytes / WORD_SIZE;
+	size_t words = bytes / WORD_SIZE;
 	u32 bank, addr;
 
 	while (words--) {
-- 
2.25.1