This is a note to let you know that I've just added the patch titled
kcm: return immediately after copy_from_user() failure
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kcm-return-immediately-after-copy_from_user-failure.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Sat Apr 29 08:22:13 CEST 2017
From: WANG Cong <xiyou.wangcong@xxxxxxxxx>
Date: Thu, 23 Mar 2017 11:03:31 -0700
Subject: kcm: return immediately after copy_from_user() failure
From: WANG Cong <xiyou.wangcong@xxxxxxxxx>
[ Upstream commit a80db69e47d764bbcaf2fec54b1f308925e7c490 ]
There is no reason to continue after a copy_from_user()
failure.
Fixes: ab7ac4eb9832 ("kcm: Kernel Connection Multiplexor module")
Cc: Tom Herbert <tom@xxxxxxxxxxxxxxx>
Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/kcm/kcmsock.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1685,7 +1685,7 @@ static int kcm_ioctl(struct socket *sock
struct kcm_attach info;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
- err = -EFAULT;
+ return -EFAULT;
err = kcm_attach_ioctl(sock, &info);
@@ -1695,7 +1695,7 @@ static int kcm_ioctl(struct socket *sock
struct kcm_unattach info;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
- err = -EFAULT;
+ return -EFAULT;
err = kcm_unattach_ioctl(sock, &info);
@@ -1706,7 +1706,7 @@ static int kcm_ioctl(struct socket *sock
struct socket *newsock = NULL;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
- err = -EFAULT;
+ return -EFAULT;
err = kcm_clone(sock, &info, &newsock);
Patches currently in stable-queue which might be from xiyou.wangcong@xxxxxxxxx are
queue-4.9/ipv6-check-skb-protocol-before-lookup-for-nexthop.patch
queue-4.9/kcm-return-immediately-after-copy_from_user-failure.patch