INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 1, t=10502 jiffies, g=2994, c=2993, q=444)
All QSes seen, last rcu_preempt kthread activity 10500 (4294965937-4294955437), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.1  R  running task    28864  9284   7380 0x00000008
Call Trace:
 <IRQ>
 sched_show_task kernel/sched/core.c:5168 [inline]
 sched_show_task.cold+0x2e3/0x347 kernel/sched/core.c:5143
 print_other_cpu_stall kernel/rcu/tree.c:1501 [inline]
 check_cpu_stall kernel/rcu/tree.c:1616 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0xd3f/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:__in6_dev_get include/net/addrconf.h:302 [inline]
RIP: 0010:ndisc_send_skb+0x6f1/0x11e0 net/ipv6/ndisc.c:480
RSP: 0018:ffff8880aeb07b78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff888092d48c40 RBX: ffff88805b51a540 RCX: 1ffffffff0f417ad
RDX: 1ffff110125a9188 RSI: ffffffff86e45700 RDI: ffff8880aeb2394c
RBP: ffff8880aeb07c90 R08: 0000000000000000 R09: 0000000000022012
R10: ffff88805c6def78 R11: ffff88805c6de680 R12: ffff88808dff3e80
R13: ffff88805f258180 R14: ffffffff87422ae0 R15: ffff8880aeb07d20
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__mutex_trylock_or_owner kernel/locking/mutex.c:99 [inline]
RIP: 0010:__mutex_trylock kernel/locking/mutex.c:125 [inline]
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:758 [inline]
RIP: 0010:__mutex_lock+0x32a/0x1470 kernel/locking/mutex.c:893
RSP: 0018:ffff88804dfc7ba0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffff88805c6def28 RDI: ffffffff82e6ab89
RBP: ffff88804dfc7d00 R08: dffffc0000000000 R09: ffffffff8a09a648
R10: ffff88805c6def28 R11: ffff88805c6de680 R12: fffffbfff14b0f60
R13: ffffffff8a587b00 R14: ffff88805c6de680 R15: ffff888080632500
 drbg_instantiate crypto/drbg.c:1465 [inline]
 drbg_kcapi_seed+0x169/0x105a crypto/drbg.c:1900
 crypto_rng_reset+0x75/0x110 crypto/rng.c:52
 alg_setkey crypto/af_alg.c:227 [inline]
 alg_setsockopt+0x293/0x340 crypto/af_alg.c:260
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c849
RSP: 002b:00007f7d6ccf7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f7d6ccf86d4 RCX: 000000000045c849
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000003007 R09: 0000000000000000
R10: 0000000020005480 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a23 R14: 00000000004cccda R15: 000000000076bf0c
rcu_preempt kthread starved for 10500 jiffies! g2994 c2993 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_preempt     R  running task    29984     8      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...: (1 GPs behind) idle=0e2/140000000000002/0 softirq=15930/15931 fqs=1 
	 (t=10520 jiffies g=2197 c=2196 q=3)
	1-...: (1 GPs behind) idle=0e2/140000000000002/0 softirq=15930/15931 fqs=1 
rcu_sched kthread starved for 10518 jiffies! g2197 c2196 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched       R  running task    29984     9      2 0x80000000
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_timeout+0x43c/0xe40 kernel/time/timer.c:1746
 rcu_gp_kthread+0xb8e/0x1ce0 kernel/rcu/tree.c:2255
 kthread+0x30d/0x420 kernel/kthread.c:232
	
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
(detected by 0, t=10520 jiffies, g=2197, c=2196, q=3)
NMI backtrace for cpu 1
CPU: 1 PID: 9284 Comm: syz-executor.1 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x139/0x17e lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x16d/0x1b8 kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x490/0xdaa kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x3e/0x120 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x25c/0xbb0 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline]
RIP: 0010:__in6_dev_get include/net/addrconf.h:302 [inline]
RIP: 0010:ndisc_send_skb+0x6f1/0x11e0 net/ipv6/ndisc.c:480
RSP: 0018:ffff8880aeb07b78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffff888092d48c40 RBX: ffff88805b51a540 RCX: 1ffffffff0f417ad
RDX: 1ffff110125a9188 RSI: ffffffff86e45700 RDI: ffff8880aeb2394c
RBP: ffff8880aeb07c90 R08: 0000000000000000 R09: 0000000000022012
R10: ffff88805c6def78 R11: ffff88805c6de680 R12: ffff88808dff3e80
R13: ffff88805f258180 R14: ffffffff87422ae0 R15: ffff8880aeb07d20
 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677
 addrconf_rs_timer+0x289/0x5a0 net/ipv6/addrconf.c:3757
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__mutex_trylock_or_owner kernel/locking/mutex.c:99 [inline]
RIP: 0010:__mutex_trylock kernel/locking/mutex.c:125 [inline]
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:758 [inline]
RIP: 0010:__mutex_lock+0x32a/0x1470 kernel/locking/mutex.c:893
RSP: 0018:ffff88804dfc7ba0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffff88805c6def28 RDI: ffffffff82e6ab89
RBP: ffff88804dfc7d00 R08: dffffc0000000000 R09: ffffffff8a09a648
R10: ffff88805c6def28 R11: ffff88805c6de680 R12: fffffbfff14b0f60
R13: ffffffff8a587b00 R14: ffff88805c6de680 R15: ffff888080632500
 drbg_instantiate crypto/drbg.c:1465 [inline]
 drbg_kcapi_seed+0x169/0x105a crypto/drbg.c:1900
 crypto_rng_reset+0x75/0x110 crypto/rng.c:52
 alg_setkey crypto/af_alg.c:227 [inline]
 alg_setsockopt+0x293/0x340 crypto/af_alg.c:260
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c849
RSP: 002b:00007f7d6ccf7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f7d6ccf86d4 RCX: 000000000045c849
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000003007 R09: 0000000000000000
R10: 0000000020005480 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a23 R14: 00000000004cccda R15: 000000000076bf0c
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9284 Comm: syz-executor.1 Not tainted 4.14.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88805c6de680 task.stack: ffff88804dfc0000
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:111 [inline]
RIP: 0010:unwind_next_frame+0x530/0x17a0 arch/x86/kernel/unwind_orc.c:348
RSP: 0018:ffff8880aeb077c0 EFLAGS: 00000a03
RAX: 000000000000838b RBX: ffff8880aeb07870 RCX: 000000000000838b
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff895817ec
RBP: 1ffff11015d60eff R08: 0000000000000001 R09: ffff8880aeb078f8
R10: ffff8880aeb078a5 R11: 0000000000058071 R12: ffffffff81838bfe
R13: ffff8880aeb078a8 R14: ffff8880aeb078b8 R15: 0000000000000002
FS:  00007f7d6ccf8700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000000917ec000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 slab_post_alloc_hook mm/slab.h:442 [inline]
 slab_alloc_node mm/slab.c:3333 [inline]
 kmem_cache_alloc_node+0x135/0x7a0 mm/slab.c:3640
 __alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193
 alloc_skb include/linux/skbuff.h:980 [inline]
 new_skb+0x24/0x1c0 drivers/block/aoe/aoecmd.c:67
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:427 [inline]
 aoecmd_cfg+0x155/0x570 drivers/block/aoe/aoecmd.c:1392
 discover_timer drivers/block/aoe/aoemain.c:44 [inline]
 discover_timer+0xc5/0x160 drivers/block/aoe/aoemain.c:21
 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x52a/0x1390 kernel/time/timer.c:1649
 __do_softirq+0x254/0x9bf kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x15b/0x1a0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x8f/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:__mutex_trylock_or_owner kernel/locking/mutex.c:99 [inline]
RIP: 0010:__mutex_trylock kernel/locking/mutex.c:125 [inline]
RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:758 [inline]
RIP: 0010:__mutex_lock+0x32a/0x1470 kernel/locking/mutex.c:893
RSP: 0018:ffff88804dfc7ba0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000003 RBX: 0000000000000000 RCX: 0000000000000004
RDX: 0000000000000000 RSI: ffff88805c6def28 RDI: ffffffff82e6ab89
RBP: ffff88804dfc7d00 R08: dffffc0000000000 R09: ffffffff8a09a648
R10: ffff88805c6def28 R11: ffff88805c6de680 R12: fffffbfff14b0f60
R13: ffffffff8a587b00 R14: ffff88805c6de680 R15: ffff888080632500
 drbg_instantiate crypto/drbg.c:1465 [inline]
 drbg_kcapi_seed+0x169/0x105a crypto/drbg.c:1900
 crypto_rng_reset+0x75/0x110 crypto/rng.c:52
 alg_setkey crypto/af_alg.c:227 [inline]
 alg_setsockopt+0x293/0x340 crypto/af_alg.c:260
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c849
RSP: 002b:00007f7d6ccf7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f7d6ccf86d4 RCX: 000000000045c849
RDX: 0000000000000001 RSI: 0000000000000117 RDI: 0000000000000004
RBP: 000000000076bf00 R08: 0000000000003007 R09: 0000000000000000
R10: 0000000020005480 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000a23 R14: 00000000004cccda R15: 000000000076bf0c
Code: 41 8d 53 ff 39 d0 0f 83 95 04 00 00 48 ba 00 00 00 00 00 fc ff df 89 c1 48 8d 3c 8d c0 09 56 89 48 89 fe 48 c1 ee 03 0f b6 34 16 <48> 89 fa 83 e2 07 83 c2 03 40 38 f2 7c 09 40 84 f6 0f 85 f0 0d 
rcu_sched kthread starved for 10574 jiffies! g2197 c2196 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched       R  running task    29984     9      2 0x80000000
Call Trace:
 preempt_schedule_common+0x4a/0xc0 kernel/sched/core.c:3508
 ___preempt_schedule+0x16/0x18
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
 _raw_spin_unlock_irqrestore+0xb7/0xe0 kernel/locking/spinlock.c:192
 force_qs_rnp+0xbf/0x4f0 kernel/rcu/tree.c:2854
 rcu_gp_fqs kernel/rcu/tree.c:2117 [inline]
 rcu_gp_kthread+0xe02/0x1ce0 kernel/rcu/tree.c:2269
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404