[PATCH] net: usb: Fix uninit-was-stored issue in asix_read_cmd()
From: Himadri Pandya <hidden>
Date: 2020-08-23 08:21:29
Also in:
linux-kernel-mentees, linux-usb, lkml
Subsystem:
networking drivers, the rest, usb networking drivers · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Initialize the buffer before passing it to usb_read_cmd() function(s) to fix the uninit-was-stored issue in asix_read_cmd(). Fixes: KMSAN: kernel-infoleak in raw_ioctl Reported by: syzbot+a7e220df5a81d1ab400e@syzkaller.appspotmail.com Signed-off-by: Himadri Pandya <redacted> --- drivers/net/usb/asix_common.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index e39f41efda3e..a67ea1971b78 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c@@ -17,6 +17,8 @@ int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index, BUG_ON(!dev); + memset(data, 0, size); + if (!in_pm) fn = usbnet_read_cmd; else
--
2.17.1