diff options
| author | Phillip Potter <phil@philpotter.co.uk> | 2021-04-02 01:36:07 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-02 02:09:37 +0300 |
| commit | bd78980be1a68d14524c51c4b4170782fada622b (patch) | |
| tree | 0c28539f44dd0a6c5a2d39e53256430bfb87b5f2 /drivers/net/usb/ax88179_178a.c | |
| parent | 5a32fcdb1e686e90a2c5f2d095fb79aa2fb3f176 (diff) | |
| download | linux-bd78980be1a68d14524c51c4b4170782fada622b.tar.xz | |
net: usb: ax88179_178a: initialize local variables before use
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>
Diffstat (limited to 'drivers/net/usb/ax88179_178a.c')
| -rw-r--r-- | drivers/net/usb/ax88179_178a.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c index d650b39b6e5d..c1316718304d 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, |