[07/66] pcmcia: synclink_cs: fix information leak to userland

From: Greg KH
Date: Fri Nov 19 2010 - 17:19:30 EST


2.6.36-stable review patch. If anyone has any objections, please let us know.

------------------

From: Vasiliy Kulikov <segooon@xxxxxxxxx>

commit 5b917a1420d3d1a9c8da49fb0090692dc9aaee86 upstream.

Structure new_line is copied to userland with some padding fields unitialized.
It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@xxxxxxxxx>
Signed-off-by: Dominik Brodowski <linux@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
drivers/char/pcmcia/synclink_cs.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -4127,6 +4127,8 @@ static int hdlcdev_ioctl(struct net_devi
if (cmd != SIOCWANDEV)
return hdlc_ioctl(dev, ifr, cmd);

+ memset(&new_line, 0, size);
+
switch(ifr->ifr_settings.type) {
case IF_GET_IFACE: /* return current sync_serial_settings */



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/