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usb: misc: sisusbvga: fix information leak to userland
author
Vasiliy Kulikov
<segooon@gmail.com>
Sat, 6 Nov 2010 14:41:35 +0000
(17:41 +0300)
committer
Greg Kroah-Hartman
<gregkh@suse.de>
Thu, 11 Nov 2010 15:14:06 +0000
(07:14 -0800)
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>
drivers/usb/misc/sisusbvga/sisusb.c
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diff --git
a/drivers/usb/misc/sisusbvga/sisusb.c
b/drivers/usb/misc/sisusbvga/sisusb.c
index
70d00e9
..
dd573ab
100644
(file)
--- a/
drivers/usb/misc/sisusbvga/sisusb.c
+++ b/
drivers/usb/misc/sisusbvga/sisusb.c
@@
-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;