David Lebrun fa79581ea6 ipv6: sr: fix several BUGs when preemption is enabled ... When CONFIG_PREEMPT=y, CONFIG_IPV6=m and CONFIG_SEG6_HMAC=y, seg6_hmac_init() is called during the initialization of the ipv6 module. This causes a subsequent call to smp_processor_id() with preemption enabled, resulting in the following trace. [ 20.451460] BUG: using smp_processor_id() in preemptible [00000000] code: systemd/1 [ 20.452556] caller is debug_smp_processor_id+0x17/0x19 [ 20.453304] CPU: 0 PID: 1 Comm: systemd Not tainted 4.9.0-rc5-00973-g46738b1 #1 [ 20.454406] ffffc9000062fc18 ffffffff813607b2 0000000000000000 ffffffff81a7f782 [ 20.455528] ffffc9000062fc48 ffffffff813778dc 0000000000000000 00000000001dcf98 [ 20.456539] ffffffffa003bd08 ffffffff81af93e0 ffffc9000062fc58 ffffffff81377905 [ 20.456539] Call Trace: [ 20.456539] [<ffffffff813607b2>] dump_stack+0x63/0x7f [ 20.456539] [<ffffffff813778dc>] check_preemption_disabled+0xd1/0xe3 [ 20.456539] [<ffffffff81377905>] debug_smp_processor_id+0x17/0x19 [ 20.460260] [<ffffffffa0061f3b>] seg6_hmac_init+0xfa/0x192 [ipv6] [ 20.460260] [<ffffffffa0061ccc>] seg6_init+0x39/0x6f [ipv6] [ 20.460260] [<ffffffffa006121a>] inet6_init+0x21a/0x321 [ipv6] [ 20.460260] [<ffffffffa0061000>] ? 0xffffffffa0061000 [ 20.460260] [<ffffffff81000457>] do_one_initcall+0x8b/0x115 [ 20.460260] [<ffffffff811328a3>] do_init_module+0x53/0x1c4 [ 20.460260] [<ffffffff8110650a>] load_module+0x1153/0x14ec [ 20.460260] [<ffffffff81106a7b>] SYSC_finit_module+0x8c/0xb9 [ 20.460260] [<ffffffff81106a7b>] ? SYSC_finit_module+0x8c/0xb9 [ 20.460260] [<ffffffff81106abc>] SyS_finit_module+0x9/0xb [ 20.460260] [<ffffffff810014d1>] do_syscall_64+0x62/0x75 [ 20.460260] [<ffffffff816834f0>] entry_SYSCALL64_slow_path+0x25/0x25 Moreover, dst_cache_* functions also call smp_processor_id(), generating a similar trace. This patch uses raw_cpu_ptr() in seg6_hmac_init() rather than this_cpu_ptr() and disable preemption when using dst_cache_* functions. Signed-off-by: David Lebrun <david.lebrun@uclouvain.be> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-01-13 12:29:55 -05:00
..
ila
netfilter	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
addrconf_core.c
addrconf.c	ipv6 addrconf: Implemented enhanced DAD (RFC7527)	2016-12-03 23:21:37 -05:00
addrlabel.c
af_inet6.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
ah6.c
anycast.c
calipso.c
datagram.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
esp6.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-12-03 12:29:53 -05:00
exthdrs_core.c
exthdrs_offload.c
exthdrs.c	ktime: Get rid of the union	2016-12-25 17:21:22 +01:00
fib6_rules.c
fou6.c
icmp.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
inet6_connection_sock.c	inet: Fix get port to handle zero port number with soreuseport set	2016-12-17 11:13:19 -05:00
inet6_hashtables.c
ip6_checksum.c
ip6_fib.c
ip6_flowlabel.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
ip6_gre.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
ip6_icmp.c
ip6_input.c
ip6_offload.c	gro: Disable frag0 optimization on IPv6 ext headers	2017-01-10 21:30:33 -05:00
ip6_offload.h
ip6_output.c	ipv6: Should use consistent conditional judgement for ip6 fragment between __ip6_append_data and ip6_finish_output	2016-12-29 11:55:17 -05:00
ip6_tunnel.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
ip6_udp_tunnel.c
ip6_vti.c	vti6: fix device register to report IFLA_INFO_KIND	2017-01-06 16:09:09 -05:00
ip6mr.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
ipcomp6.c
ipv6_sockglue.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
Kconfig	ipv6: sr: add option to control lwtunnel support	2016-11-16 11:29:46 -05:00
Makefile	ipv6: sr: add option to control lwtunnel support	2016-11-16 11:29:46 -05:00
mcast_snoop.c
mcast.c
mip6.c	ktime: Get rid of ktime_equal()	2016-12-25 17:21:23 +01:00
ndisc.c	ipv6 addrconf: Implemented enhanced DAD (RFC7527)	2016-12-03 23:21:37 -05:00
netfilter.c
output_core.c	ipv6: Set skb->protocol properly for local output	2016-12-02 12:34:22 -05:00
ping.c
proc.c
protocol.c
raw.c	ipv6: handle -EFAULT from skb_copy_bits	2016-12-23 12:20:39 -05:00
reassembly.c
route.c	net: lwtunnel: Handle lwtunnel_fill_encap failure	2017-01-12 15:11:43 -05:00
seg6_hmac.c	ipv6: sr: fix several BUGs when preemption is enabled	2017-01-13 12:29:55 -05:00
seg6_iptunnel.c	ipv6: sr: fix several BUGs when preemption is enabled	2017-01-13 12:29:55 -05:00
seg6.c	ipv6: sr: add option to control lwtunnel support	2016-11-16 11:29:46 -05:00
sit.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
syncookies.c	tcp: randomize tcp timestamp offsets for each connection	2016-12-02 12:49:59 -05:00
sysctl_net_ipv6.c
tcp_ipv6.c	tcp: tsq: move tsq_flags close to sk_wmem_alloc	2016-12-05 13:32:24 -05:00
tcpv6_offload.c
tunnel6.c
udp_impl.h	udplite: call proper backlog handlers	2016-11-24 15:32:14 -05:00
udp_offload.c
udp.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
udplite.c	udplite: call proper backlog handlers	2016-11-24 15:32:14 -05:00
xfrm6_input.c
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c
xfrm6_policy.c
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00