=====================================
[ BUG: bad unlock balance detected! ]
4.4.113-g962d1f3 #2 Not tainted
-------------------------------------
syz-executor1/6733 is trying to release lock (mrt_lock) at:
[<ffffffff833c5684>] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553
but there are no more locks to release!

other info that might help us debug this:
2 locks held by syz-executor1/6733:
 #0:  (sb_writers#7){.+.+.+}, at: [<ffffffff815200c4>] file_start_write include/linux/fs.h:2523 [inline]
 #0:  (sb_writers#7){.+.+.+}, at: [<ffffffff815200c4>] do_sendfile+0x8e4/0xd30 fs/read_write.c:1226
 #1:  (&p->lock){+.+.+.}, at: [<ffffffff8158c2bd>] seq_read+0xdd/0x1270 fs/seq_file.c:178

stack backtrace:
CPU: 0 PID: 6733 Comm: syz-executor1 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 9b0941dbee056918 ffff8801d7bef190 ffffffff81d028ed
 ffffffff84771c18 ffff8801d6015f00 ffffffff833c5684 ffffffff84771c18
 ffff8801d6016748 ffff8801d7bef1c0 ffffffff81232484 dffffc0000000000
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81232484>] print_unlock_imbalance_bug+0x174/0x1a0 kernel/locking/lockdep.c:3266
 [<ffffffff8123d31a>] __lock_release kernel/locking/lockdep.c:3408 [inline]
 [<ffffffff8123d31a>] lock_release+0x72a/0xc10 kernel/locking/lockdep.c:3611
 [<ffffffff837715ba>] __raw_read_unlock include/linux/rwlock_api_smp.h:225 [inline]
 [<ffffffff837715ba>] _raw_read_unlock+0x1a/0x50 kernel/locking/spinlock.c:255
 [<ffffffff833c5684>] ipmr_mfc_seq_stop+0xe4/0x140 net/ipv6/ip6mr.c:553
 [<ffffffff8158cc60>] seq_read+0xa80/0x1270 fs/seq_file.c:283
 [<ffffffff8166490f>] proc_reg_read+0xef/0x170 fs/proc/inode.c:202
 [<ffffffff8151c6d1>] do_loop_readv_writev+0x141/0x1e0 fs/read_write.c:680
 [<ffffffff8151ea2d>] do_readv_writev+0x5dd/0x6e0 fs/read_write.c:810
 [<ffffffff8151eba8>] vfs_readv+0x78/0xb0 fs/read_write.c:834
 [<ffffffff815b8eaa>] kernel_readv fs/splice.c:586 [inline]
 [<ffffffff815b8eaa>] default_file_splice_read+0x4fa/0x8e0 fs/splice.c:662
 [<ffffffff815b4bd5>] do_splice_to+0xf5/0x140 fs/splice.c:1154
 [<ffffffff815b4e70>] splice_direct_to_actor+0x250/0x830 fs/splice.c:1226
 [<ffffffff815b55f7>] do_splice_direct+0x1a7/0x270 fs/splice.c:1337
 [<ffffffff8151fd2c>] do_sendfile+0x54c/0xd30 fs/read_write.c:1227
 [<ffffffff81521d83>] SYSC_sendfile64 fs/read_write.c:1282 [inline]
 [<ffffffff81521d83>] SyS_sendfile64+0xc3/0x150 fs/read_write.c:1274
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'.
netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'.
binder: BINDER_SET_CONTEXT_MGR already set
binder: 6866:6869 ioctl 40046207 0 returned -16
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/6935
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 6935 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 0d4b30ec47fed158 ffff8800b7527468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8801d40c97c0
 0000000000000003 ffff8800b75274a8 ffffffff81d62834 ffff8800b75274c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/6956
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 6956 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 5ab2698b73083ea9 ffff8800b78b7468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0[   52.277624] audit: type=1326 audit(1517294677.297:17): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6949 comm="syz-executor3" exe="/root/syz-executor3" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0
 ffff8801d43a5f00
 0000000000000003 ffff8800b78b74a8 ffffffff81d62834 ffff8800b78b74c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
audit: type=1326 audit(1517294677.297:18): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6949 comm="syz-executor3" exe="/root/syz-executor3" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/6993
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 6993 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 29f40b6ae328e09a ffff8800b78b7468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8801d6d52f80
 0000000000000003 ffff8800b78b74a8 ffffffff81d62834 ffff8800b78b74c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7037
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7037 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000[   53.194147] device gre0 entered promiscuous mode
 e605a9d5cf93f4ab ffff8801c4a27468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b6824740
 0000000000000003 ffff8801c4a274a8 ffffffff81d62834 ffff8801c4a274c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
capability: warning: `syz-executor6' uses deprecated v2 capabilities in a way that may be insecure
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7082
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7082 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 361aabdd31d2af17 ffff8800b687f468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b8d75f00
 0000000000000003 ffff8800b687f4a8 ffffffff81d62834 ffff8800b687f4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
device gre0 entered promiscuous mode
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
IPVS: Creating netns size=2552 id=10
check_preemption_disabled: 6 callbacks suppressed
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7343
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7343 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 1f75a9715eebaf11 ffff8801d2077468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b5d34740
 0000000000000003 ffff8801d20774a8 ffffffff81d62834 ffff8801d20774c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor4/7349
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7349 Comm: syz-executor4 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 1961f7e08c14feba ffff8801d3297468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8801d2445f00
 0000000000000003 ffff8801d32974a8 ffffffff81d62834 ffff8801d32974c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor4/7382
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 7382 Comm: syz-executor4 Not tainted 4.4.113-g962d1f3 #2
device gre0 entered promiscuous mode
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 ae9e21c2af15280c ffff8801d1947468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b5af97c0
 0000000000000003 ffff8801d19474a8 ffffffff81d62834 ffff8801d19474c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7385
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 7385 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 37207d7dc5312164 ffff8801d4dbf468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b5e2c740
 0000000000000003 ffff8801d4dbf4a8 ffffffff81d62834 ffff8801d4dbf4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7415
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7415 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000[   57.179194] device gre0 entered promiscuous mode
 bb35d3c098bfadcf ffff8801d604f468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8801d22f0000
 0000000000000003 ffff8801d604f4a8 ffffffff81d62834 ffff8801d604f4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
device gre0 entered promiscuous mode
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7465
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 7465 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 2af39b0e02e26590 ffff8800b5b7f468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b5a2af80
 0000000000000003 ffff8800b5b7f4a8 ffffffff81d62834 ffff8800b5b7f4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
device gre0 entered promiscuous mode
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
device gre0 entered promiscuous mode
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7502
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 1 PID: 7502 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 8284f2f917cd72ea ffff8800b4e1f468 ffffffff81d028ed
 0000000000000001 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b5d28000
 0000000000000003 ffff8800b4e1f4a8 ffffffff81d62834 ffff8800b4e1f4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
device gre0 entered promiscuous mode
device gre0 entered promiscuous mode
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7543
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7543 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 d9a678a8e1ec1c51 ffff8801d121f468 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b633c740
 0000000000000003 ffff8801d121f4a8 ffffffff81d62834 ffff8801d121f4c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98
device gre0 entered promiscuous mode
IPVS: Creating netns size=2552 id=11
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-executor2/7713
caller is __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
CPU: 0 PID: 7713 Comm: syz-executor2 Not tainted 4.4.113-g962d1f3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 0000000000000000 71785e16172bf0a7 ffff8800b2d27468[   60.302923] device gre0 entered promiscuous mode
 ffffffff81d028ed
 0000000000000000 ffffffff839fe3a0 ffffffff83d0b8a0 ffff8800b54497c0
 0000000000000003 ffff8800b2d274a8 ffffffff81d62834 ffff8800b2d274c0
Call Trace:
 [<ffffffff81d028ed>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d028ed>] dump_stack+0xc1/0x124 lib/dump_stack.c:51
 [<ffffffff81d62834>] check_preemption_disabled+0x1d4/0x200 lib/smp_processor_id.c:46
 [<ffffffff81d6289c>] __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:62
 [<ffffffff832e03e8>] ipcomp_alloc_tfms net/xfrm/xfrm_ipcomp.c:286 [inline]
 [<ffffffff832e03e8>] ipcomp_init_state+0x188/0x980 net/xfrm/xfrm_ipcomp.c:363
 [<ffffffff833e8e55>] ipcomp6_init_state+0xb5/0x820 net/ipv6/ipcomp6.c:165
 [<ffffffff832bed57>] __xfrm_init_state+0x3e7/0xb30 net/xfrm/xfrm_state.c:2058
 [<ffffffff832ddbd6>] xfrm_state_construct net/xfrm/xfrm_user.c:590 [inline]
 [<ffffffff832ddbd6>] xfrm_add_sa+0x1916/0x2e40 net/xfrm/xfrm_user.c:636
 [<ffffffff832ce13c>] xfrm_user_rcv_msg+0x41c/0x6b0 net/xfrm/xfrm_user.c:2525
 [<ffffffff82f88b1e>] netlink_rcv_skb+0x13e/0x370 net/netlink/af_netlink.c:2349
 [<ffffffff832ca66f>] xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2533
 [<ffffffff82f876a2>] netlink_unicast_kernel net/netlink/af_netlink.c:1267 [inline]
 [<ffffffff82f876a2>] netlink_unicast+0x522/0x760 net/netlink/af_netlink.c:1293
 [<ffffffff82f881c8>] netlink_sendmsg+0x8e8/0xc50 net/netlink/af_netlink.c:1847
 [<ffffffff82dea20a>] sock_sendmsg_nosec net/socket.c:625 [inline]
 [<ffffffff82dea20a>] sock_sendmsg+0xca/0x110 net/socket.c:635
 [<ffffffff82debde1>] ___sys_sendmsg+0x6c1/0x7c0 net/socket.c:1962
 [<ffffffff82dede33>] __sys_sendmsg+0xd3/0x190 net/socket.c:1996
 [<ffffffff82dedf1d>] SYSC_sendmsg net/socket.c:2007 [inline]
 [<ffffffff82dedf1d>] SyS_sendmsg+0x2d/0x50 net/socket.c:2003
 [<ffffffff83771c9f>] entry_SYSCALL_64_fastpath+0x1c/0x98