From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Phillip Potter <phil@philpotter.co.uk>,
syzbot+4993e4a0e237f1b53747@syzkaller.appspotmail.com,
"David S . Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>,
linux-usb@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 31/85] net: usb: ax88179_178a: initialize local variables before use
Date: Wed, 5 May 2021 12:35:54 -0400 [thread overview]
Message-ID: <20210505163648.3462507-31-sashal@kernel.org> (raw)
In-Reply-To: <20210505163648.3462507-1-sashal@kernel.org>
From: Phillip Potter <phil@philpotter.co.uk>
[ Upstream commit bd78980be1a68d14524c51c4b4170782fada622b ]
Use memset to initialize local array in drivers/net/usb/ax88179_178a.c, and
also set a local u16 and u32 variable to 0. Fixes a KMSAN found uninit-value bug
reported by syzbot at:
https://syzkaller.appspot.com/bug?id=00371c73c72f72487c1d0bfe0cc9d00de339d5aa
Reported-by: syzbot+4993e4a0e237f1b53747@syzkaller.appspotmail.com
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/usb/ax88179_178a.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
index 5541f3faedbc..b77b0a33d697 100644
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -296,12 +296,12 @@ static int ax88179_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
int ret;
if (2 == size) {
- u16 buf;
+ u16 buf = 0;
ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0);
le16_to_cpus(&buf);
*((u16 *)data) = buf;
} else if (4 == size) {
- u32 buf;
+ u32 buf = 0;
ret = __ax88179_read_cmd(dev, cmd, value, index, size, &buf, 0);
le32_to_cpus(&buf);
*((u32 *)data) = buf;
@@ -1296,6 +1296,8 @@ static void ax88179_get_mac_addr(struct usbnet *dev)
{
u8 mac[ETH_ALEN];
+ memset(mac, 0, sizeof(mac));
+
/* Maybe the boot loader passed the MAC address via device tree */
if (!eth_platform_get_mac_address(&dev->udev->dev, mac)) {
netif_dbg(dev, ifup, dev->net,
--
2.30.2
parent reply other threads:[~2021-05-05 16:55 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20210505163648.3462507-1-sashal@kernel.org>]
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