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USB: usbtmc: prevent kernel-usb-infoleak

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The syzbot reported a kernel-usb-infoleak in usbtmc_write,
we need to clear the structure before filling fields.

Fixes: 4ddc645f40e9 ("usb: usbtmc: Add ioctl for vendor specific write")
Reported-and-tested-by: syzbot+9d34f80f841e948c3fdb@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=9d34f80f841e948c3fdb
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/tencent_9649AA6EC56EDECCA8A7D106C792D1C66B06@qq.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Edward Adam Davis 2024-09-08 17:17:41 +08:00 committed by Greg Kroah-Hartman
parent 0088d7581b
commit 625fa77151
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/class/usbtmc.c
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@ -754,7 +754,7 @@ static struct urb *usbtmc_create_urb(void)
if (!urb)
return NULL;
dmabuf = kmalloc(bufsize, GFP_KERNEL);
dmabuf = kzalloc(bufsize, GFP_KERNEL);
if (!dmabuf) {
usb_free_urb(urb);
return NULL;