rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=6ca/1/0x4000000000000000 softirq=193504/193504 fqs=35 
	(t=10500 jiffies g=267873 q=412)
rcu: rcu_preempt kthread starved for 10416 jiffies! g267873 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:26256 pid:   14 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0xc07/0x11f0 kernel/sched/core.c:5940
 schedule+0x14b/0x210 kernel/sched/core.c:6019
 schedule_timeout+0x1aa/0x2f0 kernel/time/timer.c:1892
 rcu_gp_fqs_loop kernel/rcu/tree.c:2004 [inline]
 rcu_gp_kthread+0x112d/0x2190 kernel/rcu/tree.c:2177
 kthread+0x453/0x480 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
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: 31328 Comm: syz-executor.2 Tainted: G        W         5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x60 kernel/kcov.c:196
Code: 00 00 00 0f 1f 00 be 0d 00 00 00 48 c7 c7 c0 40 f5 8c e8 ff a4 48 00 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 04 24 <65> 48 8b 0c 25 80 ef 01 00 65 8b 15 84 2c 82 7e f7 c2 00 01 ff 00
RSP: 0018:ffffc900000077c0 EFLAGS: 00000046
RAX: ffffffff816fbfb9 RBX: 0000000000000003 RCX: 0000000000000018
RDX: ffff88814ef93880 RSI: 0000000000000003 RDI: 0000000000000003
RBP: 1ffff11017344c41 R08: ffffffff816fbfaf R09: fffffbfff1c72efe
R10: fffffbfff1c72efe R11: 0000000000000000 R12: ffff8880b9a26328
R13: 000003b3a7855dce R14: 0000019b232deb70 R15: 0000000000000003
FS:  00007f60fefd0700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f60fefaf718 CR3: 000000016ad09000 CR4: 00000000001506f0
Call Trace:
 <IRQ>
 ktime_get_update_offsets_now+0x259/0x460 kernel/time/timekeeping.c:2301
 hrtimer_update_base kernel/time/hrtimer.c:631 [inline]
 hrtimer_interrupt+0x143/0x1040 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline]
RIP: 0010:do_raw_spin_lock+0x8c/0x8e0 kernel/locking/spinlock_debug.c:112
Code: f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 49 89 df 49 c1 ef 03 41 8a 04 17 84 c0 0f 85 53 04 00 00 49 89 dc 8b 03 <3d> ad 4e ad de 0f 85 5d 01 00 00 49 8d 58 10 48 89 d8 48 c1 e8 03
RSP: 0018:ffffc90000007a60 EFLAGS: 00000246
RAX: 00000000dead4ead RBX: ffff88814e241cb4 RCX: 1ffff92000000f54
RDX: dffffc0000000000 RSI: 1ffff92000000f54 RDI: ffff88814e241cb0
RBP: ffffc90000007b28 R08: ffff88814e241cb0 R09: fffffbfff1c72efe
R10: fffffbfff1c72efe R11: 0000000000000000 R12: ffff88814e241cb4
R13: ffffc90000007be0 R14: 0000000000000100 R15: 1ffff11029c48396
 spin_lock include/linux/spinlock.h:354 [inline]
 mrp_join_timer+0x2b/0x7b0 net/802/mrp.c:590
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers+0x6ff/0x910 kernel/time/timer.c:1745
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1758
 __do_softirq+0x372/0x783 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x21b/0x260 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:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:tomoyo_check_acl+0xbd/0x430 security/tomoyo/domain.c:173
Code: 49 39 dc 0f 84 14 02 00 00 0f 1f 40 00 49 8d 6c 24 18 48 89 e8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 1d 01 00 00 0f b6 6d 00 <31> ff 89 ee e8 3a e5 b6 fd 85 ed 74 16 e8 61 e2 b6 fd e9 c6 00 00
RSP: 0018:ffffc900023c7518 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880366c1390 RCX: 0000000000040000
RDX: ffffc9000e731000 RSI: 0000000000003123 RDI: 0000000000003124
RBP: 0000000000000000 R08: ffffffff83c8e0e6 R09: ffffffff83ca7902
R10: 0000000000000002 R11: ffff88814ef93880 R12: ffff88801e8cd580
R13: dffffc0000000000 R14: ffff8880366c1380 R15: 0000000000000000
 tomoyo_path_permission+0x1af/0x370 security/tomoyo/file.c:586
 tomoyo_check_open_permission+0x323/0x460 security/tomoyo/file.c:780
 security_file_open+0x50/0xc0 security/security.c:1633
 do_dentry_open+0x36b/0x1010 fs/open.c:813
 do_open fs/namei.c:3361 [inline]
 path_openat+0x28e6/0x39b0 fs/namei.c:3494
 do_filp_open+0x221/0x460 fs/namei.c:3521
 do_sys_openat2+0x124/0x460 fs/open.c:1195
 do_sys_open fs/open.c:1211 [inline]
 __do_sys_creat fs/open.c:1285 [inline]
 __se_sys_creat fs/open.c:1279 [inline]
 __x64_sys_creat+0x11f/0x160 fs/open.c:1279
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f60fefd0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8
R13: 00007ffd07dbacbf R14: 00007f60fefd0300 R15: 0000000000022000
NMI backtrace for cpu 1
CPU: 1 PID: 31288 Comm: syz-executor.2 Tainted: G        W         5.13.0-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:79 [inline]
 dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:96
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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:341
 print_cpu_stall kernel/rcu/tree_stall.h:624 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:699 [inline]
 rcu_pending kernel/rcu/tree.c:3911 [inline]
 rcu_sched_clock_irq+0x1d0d/0x2a30 kernel/rcu/tree.c:2649
 update_process_times+0x197/0x200 kernel/time/timer.c:1796
 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:1537 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1601
 hrtimer_interrupt+0x3b3/0x1040 kernel/time/hrtimer.c:1663
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x270 arch/x86/kernel/apic/apic.c:1106
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1100
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:166 [inline]
RIP: 0010:unwind_next_frame+0x23e/0x1fa0 arch/x86/kernel/unwind_orc.c:443
Code: ff c0 4b 8d 04 7f 48 8d 94 00 a0 4f a9 8e 48 c7 c0 e2 3a 42 8f 48 39 c2 0f 83 c8 16 00 00 4b 8d 0c 40 48 8d 8c 09 a0 4f a9 8e <48> 39 c1 0f 87 b3 16 00 00 45 29 f8 0f 84 96 01 00 00 4e 8d 34 bd
RSP: 0018:ffffc90000dc03c0 EFLAGS: 00000287
RAX: ffffffff8f423ae2 RBX: ffffffff8f43f4c8 RCX: ffffffff8eb259e4
RDX: ffffffff8eb259b4 RSI: ffffffff816e78e3 RDI: 0000000000000001
RBP: 0000000000006e78 R08: 00000000000181b6 R09: ffffc90000dc0550
R10: fffff520001b809c R11: 0000000000000000 R12: ffffffff816e78e2
R13: ffffc90000dc0401 R14: dffffc0000000000 R15: 00000000000181ae
 arch_stack_walk+0xb2/0xe0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x3d/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0x109/0x150 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:229 [inline]
 slab_free_hook mm/slub.c:1639 [inline]
 slab_free_freelist_hook+0x1d8/0x290 mm/slub.c:1664
 slab_free mm/slub.c:3224 [inline]
 kfree+0xcf/0x2d0 mm/slub.c:4268
 skb_release_all net/core/skbuff.c:730 [inline]
 __kfree_skb+0x56/0x1d0 net/core/skbuff.c:744
 kfree_skb_list+0x41/0x70 net/core/skbuff.c:771
 __dev_xmit_skb net/core/dev.c:3938 [inline]
 __dev_queue_xmit+0x243b/0x3500 net/core/dev.c:4241
 mrp_queue_xmit net/802/mrp.c:351 [inline]
 mrp_join_timer+0x578/0x7b0 net/802/mrp.c:595
 call_timer_fn+0xf6/0x210 kernel/time/timer.c:1431
 expire_timers kernel/time/timer.c:1476 [inline]
 __run_timers+0x6ff/0x910 kernel/time/timer.c:1745
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1758
 __do_softirq+0x372/0x783 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x21b/0x260 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:1100
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:perf_install_in_context+0x7a0/0xaa0 kernel/events/core.c:2918
Code: e7 e8 04 07 27 00 e9 52 ff ff ff 48 8b 4c 24 28 80 e1 07 80 c1 03 38 c1 7c 99 48 8b 7c 24 28 e8 e6 06 27 00 eb 8d 0f 1f 40 00 <31> ff 44 89 fe e8 56 5a de ff 45 85 ff 0f 84 f8 00 00 00 48 8b 7c
RSP: 0018:ffffc9000215fba0 EFLAGS: 00000213
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc9000e12e000 RSI: 000000000000022a RDI: 000000000000022b
RBP: ffffc9000215fcf0 R08: ffffffff81a16bf7 R09: ffffed1017366c8a
R10: ffffed1017366c8a R11: 0000000000000000 R12: ffff888156119c88
R13: 1ffff9200042bf87 R14: ffffc9000215fc20 R15: 0000000000000000
 __do_sys_perf_event_open kernel/events/core.c:12323 [inline]
 __se_sys_perf_event_open+0x2d21/0x4020 kernel/events/core.c:11929
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f60ff033188 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00000000200003c0
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd07dbacbf R14: 00007f60ff033300 R15: 0000000000022000