linux-kernel - [PATCH net] can: kvaser_usb: kvaser_usb_leaf: Fix some info-leaks to USB devices

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>] [thread-next>] [day] [month] [year] [list]

Message-ID: <tencent_B88CC7093F21BB59E7B4298209F208E02708@qq.com>
Date: Fri,  9 Jan 2026 01:36:48 +0000
From: Jerry Wu <w.7erry@...mail.com>
To: mkl@...gutronix.de
Cc: mailhol@...nel.org,
	extja@...ser.com,
	eeodqql09@...il.com,
	linux-can@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	w.7erry@...mail.com
Subject: [PATCH net] can: kvaser_usb: kvaser_usb_leaf: Fix some info-leaks to USB devices

Uninitialized Kernel memory can leak to USB devices.

Fix this by using kzalloc() instead of kmalloc().

Fixes: 7259124eac7d ("can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c")
Signed-off-by: Jerry Wu <w.7erry@...mail.com>
---
Commit da2311a6385c (can: kvaser_usb: kvaser_usb_leaf: Fix some info-leaks to USB devices) 
fixed a similar issue, CVE-2019-19947, in the same file. The other functions 
contain similar logic. Would it make sense to fix them in the same way?

Thank you for time reading this. My apologies if I missed anything.

 drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
index 1167d38344f1..b031e6e42a41 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -723,7 +723,7 @@ static int kvaser_usb_leaf_send_simple_cmd(const struct kvaser_usb *dev,
 	struct kvaser_cmd *cmd;
 	int rc;
 
-	cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 	if (!cmd)
 		return -ENOMEM;
 
@@ -1881,7 +1881,7 @@ static int kvaser_usb_leaf_set_bittiming(const struct net_device *netdev,
 	struct kvaser_cmd *cmd;
 	int rc;
 
-	cmd = kmalloc(sizeof(*cmd), GFP_KERNEL);
+	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 	if (!cmd)
 		return -ENOMEM;
 
-- 
2.52.0