GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
net_ratelimit: 8 callbacks suppressed
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 0, t=10502 jiffies, g=23461, c=23460, q=1327)
All QSes seen, last rcu_preempt kthread activity 10502 (4295021380-4295010878), jiffies_till_next_fqs=1, root ->qsmask 0x0
syz-executor.0 R running task 27824 32732 6349 0x00000008
Call Trace:
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
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
__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:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:preempt_count_add+0x7e/0x170 kernel/sched/core.c:3107
RSP: 0018:ffff8880aea07310 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814d4b3a RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880aea07d20
R10: ffff8880aea0740d R11: 0000000000058071 R12: 0000000000000000
R13: ffff8880aea07410 R14: ffff8880a011c300 R15: 0000000000000002
unwind_next_frame+0xc6/0x17a0 arch/x86/kernel/unwind_orc.c:336
__save_stack_trace+0x6b/0xd0 arch/x86/kernel/stacktrace.c:44
save_stack+0x32/0xa0 mm/kasan/kasan.c:447
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
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
kmem_cache_alloc_node+0x148/0x7a0 mm/slab.c:3642
__alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193
alloc_skb include/linux/skbuff.h:980 [inline]
sctp_packet_transmit+0x30c/0x2d70 net/sctp/output.c:580
sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150
sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391
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
RIP: 0010:depot_save_stack+0x111/0x401 lib/stackdepot.c:282
RSP: 0018:ffff8881fc0ff6e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: 00000000ca5f88d0 RCX: 0000000000000007
RDX: 00000000000000ff RSI: ffff888050f55630 RDI: ffff8881fc0ff750
RBP: ffff8881fc0ff738 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880a011cbb0 R11: ffff8880a011c300 R12: 0000000000000068
R13: 000000000000000d R14: ffff8881fc0ff750 R15: ffff888050f555b0
save_stack+0x89/0xa0 mm/kasan/kasan.c:453
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 mm/slab.c:3390 [inline]
kmem_cache_alloc+0x114/0x770 mm/slab.c:3550
kmem_cache_zalloc include/linux/slab.h:651 [inline]
alloc_vfsmnt+0x23/0x7c0 fs/namespace.c:205
clone_mnt+0x6c/0xf20 fs/namespace.c:1086
copy_tree+0x33a/0x860 fs/namespace.c:1837
copy_mnt_ns+0x112/0x8a0 fs/namespace.c:2977
create_new_namespaces+0xc9/0x730 kernel/nsproxy.c:75
copy_namespaces+0x27b/0x310 kernel/nsproxy.c:165
copy_process.part.0+0x2603/0x6a50 kernel/fork.c:1774
copy_process kernel/fork.c:1586 [inline]
_do_fork+0x180/0xc80 kernel/fork.c:2070
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007f362a06cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00000000004da840 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000030020100
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000076 R14: 00000000004c311e R15: 00007f362a06d6d4
rcu_preempt kthread starved for 10502 jiffies! g23461 c23460 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_preempt R running task 29920 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
0-...: (1 GPs behind) idle=1aa/140000000000002/0 softirq=79086/79105 fqs=11
(t=10516 jiffies g=11530 c=11529 q=2)
rcu_sched kthread starved for 10490 jiffies! g11530 c11529 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=1
rcu_sched R running task 29920 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
NMI backtrace for cpu 0
CPU: 0 PID: 32732 Comm: syz-executor.0 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__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:preempt_count arch/x86/include/asm/preempt.h:23 [inline]
RIP: 0010:preempt_count_add+0x7e/0x170 kernel/sched/core.c:3107
RSP: 0018:ffff8880aea07310 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000004 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814d4b3a RDI: 0000000000000001
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff8880aea07d20
R10: ffff8880aea0740d R11: 0000000000058071 R12: 0000000000000000
R13: ffff8880aea07410 R14: ffff8880a011c300 R15: 0000000000000002
unwind_next_frame+0xc6/0x17a0 arch/x86/kernel/unwind_orc.c:336
__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
kmem_cache_alloc_node+0x148/0x7a0 mm/slab.c:3642
__alloc_skb+0x9a/0x4c0 net/core/skbuff.c:193
alloc_skb include/linux/skbuff.h:980 [inline]
sctp_packet_transmit+0x30c/0x2d70 net/sctp/output.c:580
sctp_outq_flush+0xc54/0x2dd0 net/sctp/outqueue.c:1187
sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1787 [inline]
sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline]
sctp_do_sm+0x419/0x4a90 net/sctp/sm_sideeffect.c:1150
sctp_generate_heartbeat_event+0x1da/0x3f0 net/sctp/sm_sideeffect.c:391
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
RIP: 0010:depot_save_stack+0x111/0x401 lib/stackdepot.c:282
RSP: 0018:ffff8881fc0ff6e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000000000 RBX: 00000000ca5f88d0 RCX: 0000000000000007
RDX: 00000000000000ff RSI: ffff888050f55630 RDI: ffff8881fc0ff750
RBP: ffff8881fc0ff738 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880a011cbb0 R11: ffff8880a011c300 R12: 0000000000000068
R13: 000000000000000d R14: ffff8881fc0ff750 R15: ffff888050f555b0
save_stack+0x89/0xa0 mm/kasan/kasan.c:453
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 mm/slab.c:3390 [inline]
kmem_cache_alloc+0x114/0x770 mm/slab.c:3550
kmem_cache_zalloc include/linux/slab.h:651 [inline]
alloc_vfsmnt+0x23/0x7c0 fs/namespace.c:205
clone_mnt+0x6c/0xf20 fs/namespace.c:1086
copy_tree+0x33a/0x860 fs/namespace.c:1837
copy_mnt_ns+0x112/0x8a0 fs/namespace.c:2977
create_new_namespaces+0xc9/0x730 kernel/nsproxy.c:75
copy_namespaces+0x27b/0x310 kernel/nsproxy.c:165
copy_process.part.0+0x2603/0x6a50 kernel/fork.c:1774
copy_process kernel/fork.c:1586 [inline]
_do_fork+0x180/0xc80 kernel/fork.c:2070
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007f362a06cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00000000004da840 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000030020100
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000076 R14: 00000000004c311e R15: 00007f362a06d6d4
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog