| Message ID | 1391606196-3167-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index b3f627a..f7f8cff 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -1049,6 +1049,8 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo } in_dev = __in_dev_get_rtnl(dev); + if (!in_dev) + return NOTIFY_DONE; switch (event) { case NETDEV_UP:
This is a note to let you know that I have just added a patch titled fib_frontend: fix possible NULL pointer dereference to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 3b98dfe07f8af95b7e9f801209895833916442f4 Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp <socketcan@hartkopp.net> Date: Thu, 23 Jan 2014 10:19:34 +0100 Subject: fib_frontend: fix possible NULL pointer dereference commit a0065f266a9b5d51575535a25c15ccbeed9a9966 upstream. The two commits 0115e8e30d (net: remove delay at device dismantle) and 748e2d9396a (net: reinstate rtnl in call_netdevice_notifiers()) silently removed a NULL pointer check for in_dev since Linux 3.7. This patch re-introduces this check as it causes crashing the kernel when setting small mtu values on non-ip capable netdevices. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- net/ipv4/fib_frontend.c | 2 ++ 1 file changed, 2 insertions(+) -- 1.8.3.2