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Date: Fri, 4 Oct 2013 08:47:05 +0200
From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Alexei Starovoitov <ast@plumgrid.com>
Subject: Re: [PATCH v3 net-next] fix unsafe set_memory_rw from softirq
Message-ID: <20131004064705.GA4143@osiris>
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Cc: Eric Dumazet <edumazet@google.com>, Paul Mackerras <paulus@samba.org>,
 "H. Peter Anvin" <hpa@zytor.com>, sparclinux@vger.kernel.org,
 Nicolas Dichtel <nicolas.dichtel@6wind.com>, linux-s390@vger.kernel.org,
 Russell King <linux@arm.linux.org.uk>, x86@kernel.org,
 James Morris <jmorris@namei.org>, Ingo Molnar <mingo@redhat.com>,
 Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
 "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Xi Wang <xi.wang@gmail.com>,
 Matt Evans <matt@ozlabs.org>, Thomas Gleixner <tglx@linutronix.de>,
 linux-arm-kernel@lists.infradead.org, Stelian Nirlu <steliannirlu@gmail.com>,
 Nicolas Schichan <nschichan@freebox.fr>,
 Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>, netdev@vger.kernel.org,
 linux-kernel@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
 Mircea Gherzan <mgherzan@gmail.com>, Daniel Borkmann <dborkman@redhat.com>,
 Martin Schwidefsky <schwidefsky@de.ibm.com>, linux390@de.ibm.com,
 linuxppc-dev@lists.ozlabs.org, Patrick McHardy <kaber@trash.net>
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On Thu, Oct 03, 2013 at 07:24:06PM -0700, Alexei Starovoitov wrote:
> diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c
> index 7092392..a5df511 100644
> --- a/arch/s390/net/bpf_jit_comp.c
> +++ b/arch/s390/net/bpf_jit_comp.c
> @@ -881,7 +881,9 @@ void bpf_jit_free(struct sk_filter *fp)
>  	struct bpf_binary_header *header = (void *)addr;
> 
>  	if (fp->bpf_func == sk_run_filter)
> -		return;
> +		goto free_filter;
>  	set_memory_rw(addr, header->pages);
>  	module_free(NULL, header);
> +free_filter:
> +	kfree(fp);
>  }

For the s390 part:

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>