rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-...!: (10500 ticks this GP) idle=6ed/1/0x4000000000000000 softirq=86525/86525 fqs=96
(t=10500 jiffies g=143537 q=989)
rcu: rcu_preempt kthread starved for 10289 jiffies! g143537 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:26576 pid: 14 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1881
rcu_gp_fqs_loop+0x1fd/0x770 kernel/rcu/tree.c:1955
rcu_gp_kthread+0xa5/0x350 kernel/rcu/tree.c:2128
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 23864 Comm: syz-executor.5 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1097
Code: 17 48 c7 c7 a0 bd 6a 8a e8 9a 1b 00 00 65 8a 05 43 6e f0 75 84 c0 74 20 e8 ca f4 3d f7 48 89 df e8 12 1d 26 f7 e8 7d f6 3d f7 <40> 0f b6 f5 48 89 df 5b 5d e9 7f 15 00 00 48 c7 c7 e0 bd 6a 8a e8
RSP: 0018:ffffc90000007a00 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc90000007a18 RCX: 0000000000010102
RDX: 1ffffffff1ee5a00 RSI: 0000000000000102 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8f72d000 R09: ffffffff8f72d008
R10: ffffffff8f72d01c R11: ffffffff8f72d010 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007ff79aa84700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff79aa84718 CR3: 00000000a585f000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 a2 a6 bb f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 47 70 45 f7 65 8b 05 58 ba ed 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90000007ac0 EFLAGS: 00000206
RAX: 0abf50ed905cee00 RBX: 1ffff92000000f5c RCX: ffffffff81667041
RDX: dffffc0000000000 RSI: 0000000000000102 RDI: 0000000000000001
RBP: ffffc90000007b48 R08: dffffc0000000000 R09: fffffbfff1ff35f8
R10: fffffbfff1ff35f8 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff92000000f58 R14: ffffc90000007ae0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
skb_dequeue+0x10e/0x140 net/core/skbuff.c:3216
garp_queue_xmit net/802/garp.c:271 [inline]
garp_join_timer+0x95/0x130 net/802/garp.c:423
call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x71a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:finish_lock_switch+0x1c5/0x350 kernel/sched/core.c:4733
Code: be ff ff ff ff e8 bb ab b5 08 85 c0 74 37 4d 85 e4 75 58 0f 1f 44 00 00 4c 89 ff e8 b5 54 b8 08 e8 00 c5 2e 00 fb 48 83 c4 10 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 4d 85 e4 0f 85 4a ff ff ff
RSP: 0018:ffffc9000b88f7c8 EFLAGS: 00000282
RAX: 0abf50ed905cee00 RBX: 1ffff11017347410 RCX: ffffffff81667041
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880b9a3a080 R08: dffffc0000000000 R09: fffffbfff1ff35fb
R10: fffffbfff1ff35fb R11: 0000000000000000 R12: 0000000000000000
R13: ffff8880b9a3a318 R14: dffffc0000000000 R15: ffff8880b9a395c0
finish_task_switch+0x140/0x630 kernel/sched/core.c:4850
context_switch kernel/sched/core.c:4975 [inline]
__schedule+0xb7a/0x1460 kernel/sched/core.c:6253
preempt_schedule_notrace+0x14d/0x190 kernel/sched/core.c:6498
preempt_schedule_notrace_thunk+0x16/0x18
rcu_read_unlock_sched_notrace include/linux/rcupdate.h:810 [inline]
trace_lock_release+0xa1/0x150 include/trace/events/lock.h:58
lock_release+0x82/0x810 kernel/locking/lockdep.c:5648
__mutex_unlock_slowpath+0x104/0x7d0 kernel/locking/mutex.c:900
__do_sys_perf_event_open kernel/events/core.c:12417 [inline]
__se_sys_perf_event_open+0x3b1c/0x4280 kernel/events/core.c:12020
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff79d571ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff79aa84188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007ff79d6851a0 RCX: 00007ff79d571ae9
RDX: fffffdffffffffff RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00007ff79d5cbf6d R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8af3d30f R14: 00007ff79aa84300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 23805 Comm: syz-executor.5 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x22d/0x390 kernel/rcu/tree_stall.h:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq+0x1e33/0x2bc0 kernel/rcu/tree.c:2597
update_process_times+0x197/0x200 kernel/time/timer.c:1785
tick_sched_handle kernel/time/tick-sched.c:226 [inline]
tick_sched_timer+0x27d/0x420 kernel/time/tick-sched.c:1421
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:memset+0x3/0x40 mm/kasan/shadow.c:43
Code: cc cc cc cc cc cc cc 89 f6 48 8b 0c 24 31 d2 e9 63 ee ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 50 ee ff ff 55 41 56 <53> 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18 48 89 d6 ba 01 00 00
RSP: 0018:ffffc90000dc0240 EFLAGS: 00000246
RAX: 1ffff920001b8000 RBX: ffffc90000dc03b5 RCX: 1ffff920001b8070
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc90000dc03d0
RBP: ffffffff8e74f9d2 R08: 0000000000000009 R09: ffffc90000dc0380
R10: fffff520001b807c R11: 0000000000000000 R12: 1ffffffff1ce9f3a
R13: ffffc90000dc0380 R14: dffffc0000000000 R15: ffffffff8e74f9d6
unwind_next_frame+0xaa1/0x1fc0 arch/x86/kernel/unwind_orc.c:541
__unwind_start+0x60b/0x750 arch/x86/kernel/unwind_orc.c:712
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xdc/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4c/0x80 mm/kasan/common.c:46
kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x10d/0x150 mm/kasan/common.c:366
kasan_slab_free include/linux/kasan.h:235 [inline]
slab_free_hook mm/slub.c:1723 [inline]
slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1749
slab_free mm/slub.c:3513 [inline]
kfree+0xe1/0x330 mm/slub.c:4561
skb_free_head net/core/skbuff.c:655 [inline]
skb_release_data+0x3c3/0x4f0 net/core/skbuff.c:677
skb_release_all net/core/skbuff.c:742 [inline]
__kfree_skb+0x56/0x1d0 net/core/skbuff.c:756
kfree_skb_list+0x41/0x70 net/core/skbuff.c:783
__dev_xmit_skb net/core/dev.c:3881 [inline]
__dev_queue_xmit+0x2296/0x35c0 net/core/dev.c:4194
mrp_queue_xmit net/802/mrp.c:364 [inline]
mrp_join_timer+0x418/0x820 net/802/mrp.c:608
call_timer_fn+0xf6/0x210 kernel/time/timer.c:1421
expire_timers kernel/time/timer.c:1466 [inline]
__run_timers+0x71a/0x910 kernel/time/timer.c:1734
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1747
__do_softirq+0x392/0x7a3 kernel/softirq.c:558
__irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20
RIP: 0010:lock_acquire+0x21f/0x4d0 kernel/locking/lockdep.c:5641
Code: 08 4c 89 f7 e8 12 71 6a 00 f6 84 24 81 00 00 00 02 0f 85 13 02 00 00 41 f7 c4 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 04 2f 00 00 00 00 43 c7 44 2f 09 00 00 00 00 43 c7 44 2f 11
RSP: 0018:ffffc9000b6c7b20 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920016d8f74 RCX: ffff88806f51a758
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b6c7c68 R08: dffffc0000000000 R09: fffffbfff1ff35e3
R10: fffffbfff1ff35e3 R11: 0000000000000000 R12: 0000000000000246
R13: 1ffff920016d8f6c R14: ffffc9000b6c7ba0 R15: dffffc0000000000
__might_fault+0xb2/0x110 mm/memory.c:5253
_copy_to_user+0x28/0x130 lib/usercopy.c:28
copy_to_user include/linux/uaccess.h:200 [inline]
cp_new_stat fs/stat.c:378 [inline]
__do_sys_newfstat fs/stat.c:425 [inline]
__se_sys_newfstat+0x691/0x820 fs/stat.c:419
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff79d571ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff79aae7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 00007ff79d684f60 RCX: 00007ff79d571ae9
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000004
RBP: 00007ff79d5cbf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8af3d30f R14: 00007ff79aae7300 R15: 0000000000022000
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 c7 c7 a0 bd 6a 8a mov $0xffffffff8a6abda0,%rdi
7: e8 9a 1b 00 00 callq 0x1ba6
c: 65 8a 05 43 6e f0 75 mov %gs:0x75f06e43(%rip),%al # 0x75f06e56
13: 84 c0 test %al,%al
15: 74 20 je 0x37
17: e8 ca f4 3d f7 callq 0xf73df4e6
1c: 48 89 df mov %rbx,%rdi
1f: e8 12 1d 26 f7 callq 0xf7261d36
24: e8 7d f6 3d f7 callq 0xf73df6a6
* 29: 40 0f b6 f5 movzbl %bpl,%esi <-- trapping instruction
2d: 48 89 df mov %rbx,%rdi
30: 5b pop %rbx
31: 5d pop %rbp
32: e9 7f 15 00 00 jmpq 0x15b6
37: 48 c7 c7 e0 bd 6a 8a mov $0xffffffff8a6abde0,%rdi
3e: e8 .byte 0xe8