From: Eric Dumazet <[email protected]>
Date: Mon, 14 Oct 2019 06:04:38 -0700
> We need to extend the rcu_read_lock() section in rxrpc_error_report()
> and use rcu_dereference_sk_user_data() instead of plain access
> to sk->sk_user_data to make sure all rules are respected.
>
> The compiler wont reload sk->sk_user_data at will, and RCU rules
> prevent memory beeing freed too soon.
>
> Fixes: f0308fb07080 ("rxrpc: Fix possible NULL pointer access in ICMP
> handling")
> Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by
> userspace and kernel both")
> Signed-off-by: Eric Dumazet <[email protected]>
> Cc: David Howells <[email protected]>
David, please review.
