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usb: misc: sisusbvga: fix information leak to userland

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Structure sisusb_info is copied to userland with "sisusb_reserved" field
uninitialized.  It leads to leaking of contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Vasiliy Kulikov 2010-11-06 17:41:35 +03:00 committed by Greg Kroah-Hartman
parent 28609d4083
commit 5dc92cf1d0
1 changed files with 1 additions and 0 deletions
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drivers/usb/misc/sisusbvga/sisusb.c
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@ -3008,6 +3008,7 @@ sisusb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
#else
x.sisusb_conactive = 0;
#endif
memset(x.sisusb_reserved, 0, sizeof(x.sisusb_reserved));
if (copy_to_user((void __user *)arg, &x, sizeof(x)))
retval = -EFAULT;