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: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <tencent_0A6AED06CEFC7A8E6C402E156C009578E80A@qq.com>
Date: Thu,  5 Sep 2024 19:27:37 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+9d34f80f841e948c3fdb@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [usb?] KMSAN: kernel-usb-infoleak in usbtmc_write

clear save user data buf before copying data from user.

#syz test

diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index e9ddaa9b580d..19bfe25e675c 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -1586,6 +1586,7 @@ static ssize_t usbtmc_write(struct file *filp, const char __user *buf,
 		aligned = (transfersize + (USBTMC_HEADER_SIZE + 3)) & ~3;
 	}
 
+	memset(&buffer[USBTMC_HEADER_SIZE], 0, aligned - count);
 	if (copy_from_user(&buffer[USBTMC_HEADER_SIZE], buf, transfersize)) {
 		retval = -EFAULT;
 		up(&file_data->limit_write_sem);


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ