* [PATCH 4/8] char: pcmcia: synclink_cs: fix information leak to userland
@ 2010-10-17 14:41 Vasiliy Kulikov
0 siblings, 0 replies; only message in thread
From: Vasiliy Kulikov @ 2010-10-17 14:41 UTC (permalink / raw)
To: kernel-janitors
Cc: Dominik Brodowski, Gustavo F. Padovan, Marcel Holtmann,
Greg Kroah-Hartman, David S. Miller, linux-kernel
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@gmail.com>
---
Compile tested.
drivers/char/pcmcia/synclink_cs.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index db9efbe..bfc10f8 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -4091,6 +4091,8 @@ static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
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 */
--
1.7.0.4
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