Revision 55795ef5469290f89f04e12e662ded604909e462 authored by Rabin Vincent on 05 January 2016, 15:23:07 UTC, committed by David S. Miller on 06 January 2016, 05:43:52 UTC
The SKF_AD_ALU_XOR_X ancillary is not like the other ancillary data instructions since it XORs A with X while all the others replace A with some loaded value. All the BPF JITs fail to clear A if this is used as the first instruction in a filter. This was found using american fuzzy lop. Add a helper to determine if A needs to be cleared given the first instruction in a filter, and use this in the JITs. Except for ARM, the rest have only been compile-tested. Fixes: 3480593131e0 ("net: filter: get rid of BPF_S_* enum") Signed-off-by: Rabin Vincent <rabin@rab.in> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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topology.c
/*
* arch/sh/kernel/topology.c
*
* Copyright (C) 2007 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/init.h>
#include <linux/percpu.h>
#include <linux/topology.h>
#include <linux/node.h>
#include <linux/nodemask.h>
#include <linux/export.h>
static DEFINE_PER_CPU(struct cpu, cpu_devices);
cpumask_t cpu_core_map[NR_CPUS];
EXPORT_SYMBOL(cpu_core_map);
static cpumask_t cpu_coregroup_map(unsigned int cpu)
{
/*
* Presently all SH-X3 SMP cores are multi-cores, so just keep it
* simple until we have a method for determining topology..
*/
return *cpu_possible_mask;
}
const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
{
return &cpu_core_map[cpu];
}
int arch_update_cpu_topology(void)
{
unsigned int cpu;
for_each_possible_cpu(cpu)
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
return 0;
}
static int __init topology_init(void)
{
int i, ret;
#ifdef CONFIG_NEED_MULTIPLE_NODES
for_each_online_node(i)
register_one_node(i);
#endif
for_each_present_cpu(i) {
struct cpu *c = &per_cpu(cpu_devices, i);
c->hotpluggable = 1;
ret = register_cpu(c, i);
if (unlikely(ret))
printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
__func__, i, ret);
}
#if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
/*
* In the UP case, make sure the CPU association is still
* registered under each node. Without this, sysfs fails
* to make the connection between nodes other than node0
* and cpu0.
*/
for_each_online_node(i)
if (i != numa_node_id())
register_cpu_under_node(raw_smp_processor_id(), i);
#endif
return 0;
}
subsys_initcall(topology_init);
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