From ce384d91cd7a4269a1ed5d4307a70aa4c6fa14f2 Mon Sep 17 00:00:00 2001 From: Kulikov Vasiliy Date: Fri, 29 Oct 2010 23:04:33 +0000 Subject: [PATCH] isdn: mISDN: socket: fix information leak to userland Structure mISDN_devinfo is copied to userland with the field "name" that has the last elements unitialized. It leads to leaking of contents of kernel stack memory. Signed-off-by: Vasiliy Kulikov Signed-off-by: David S. Miller --- drivers/isdn/mISDN/socket.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c index 3232206406b1..7446d8b4282d 100644 --- a/drivers/isdn/mISDN/socket.c +++ b/drivers/isdn/mISDN/socket.c @@ -392,6 +392,7 @@ data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) if (dev) { struct mISDN_devinfo di; + memset(&di, 0, sizeof(di)); di.id = dev->id; di.Dprotocols = dev->Dprotocols; di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); @@ -672,6 +673,7 @@ base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) if (dev) { struct mISDN_devinfo di; + memset(&di, 0, sizeof(di)); di.id = dev->id; di.Dprotocols = dev->Dprotocols; di.Bprotocols = dev->Bprotocols | get_all_Bprotocols(); -- 2.34.1