Hello:
This patch was applied to netdev/net.git (master) by David S. Miller davem@davemloft.net:
On Tue, 23 Nov 2021 12:27:19 +0200 you wrote:
From: Nikolay Aleksandrov nikolay@nvidia.com
When we try to add an IPv6 nexthop and IPv6 is not enabled (!CONFIG_IPV6) we'll hit a NULL pointer dereference[1] in the error path of nh_create_ipv6() due to calling ipv6_stub->fib6_nh_release. The bug has been present since the beginning of IPv6 nexthop gateway support. Commit 1aefd3de7bc6 ("ipv6: Add fib6_nh_init and release to stubs") tells us that only fib6_nh_init has a dummy stub because fib6_nh_release should not be called if fib6_nh_init returns an error, but the commit below added a call to ipv6_stub->fib6_nh_release in its error path. To fix it return the dummy stub's -EAFNOSUPPORT error directly without calling ipv6_stub->fib6_nh_release in nh_create_ipv6()'s error path.
[...]
Here is the summary with links: - [net] net: nexthop: fix null pointer dereference when IPv6 is not enabled https://git.kernel.org/netdev/net/c/1c743127cc54
You are awesome, thank you!