INFO: rcu detected stall in inet_twsk

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: rcu detected stall in inet_twsk_put (2) net				4	1169d	1235d	0/26	auto-closed as invalid on 2021/05/17 08:41
upstream	INFO: rcu detected stall in inet_twsk_put net				4	1443d	1488d	0/26	auto-closed as invalid on 2020/08/11 12:16

FAT-fs (loop2): bogus number of reserved sectors FAT-fs (loop2): Can't find a valid FAT filesystem rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=a76/1/0x4000000000000004 softirq=211104/211119 fqs=5211 rcu: (t=10502 jiffies g=192085 q=388066) NMI backtrace for cpu 1 CPU: 1 PID: 2144 Comm: syz-executor.0 Not tainted 4.19.120-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:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:kmem_cache_free+0xa4/0x260 mm/slab.c:3766 Code: e8 31 2f 00 00 84 c0 74 76 41 f7 c4 00 02 00 00 74 4e e8 6f 63 cf ff 48 83 3d 9f dd 34 07 00 0f 84 a8 01 00 00 4c 89 e7 57 9d <0f> 1f 44 00 00 4c 8b 64 24 20 0f 1f 44 00 00 65 8b 05 e6 07 64 7e RSP: 0018:ffff8880ae707cd0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88809f46a418 RCX: 1ffff1100a7261e5 RDX: 0000000000000000 RSI: ffff888053930f08 RDI: 0000000000000282 RBP: ffff8880a685d980 R08: ffff888053930680 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000282 R13: ffffffff85fe45c3 R14: 0000000000000000 R15: ffff88809f46a5f8 inet_twsk_free+0x123/0x180 net/ipv4/inet_timewait_sock.c:72 inet_twsk_put+0x3b/0x50 net/ipv4/inet_timewait_sock.c:79 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x5d0/0x1540 kernel/time/timer.c:1697 __do_softirq+0x26c/0x93c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17b/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 </IRQ> RIP: 0010:schedule_debug kernel/sched/core.c:3327 [inline] RIP: 0010:__schedule+0x10e/0x1d80 kernel/sched/core.c:3437 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e9 17 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5e 18 48 89 da 48 c1 ea 03 80 3c 02 00 <0f> 85 bd 17 00 00 48 81 3b 9d 6e ac 57 0f 85 4b 1c 00 00 65 8b 05 RSP: 0018:ffff8880a0df78a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880a0df0000 RCX: ffffc90005cc1000 RDX: 1ffff110141be000 RSI: ffffffff8357adc1 RDI: ffff888053930698 RBP: ffff8880a0df7970 R08: ffff888053930680 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 000000000002c280 R14: ffff888053930680 R15: ffff8880ae72c280 preempt_schedule_common+0x4a/0xc0 kernel/sched/core.c:3639 ___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:184 try_to_wake_up+0xb0/0xe90 kernel/sched/core.c:2056 wake_up_process kernel/sched/core.c:2124 [inline] wake_up_q+0x94/0xf0 kernel/sched/core.c:442 futex_wake+0x3f9/0x490 kernel/futex.c:1636 do_futex+0x31f/0x1b80 kernel/futex.c:3714 __do_sys_futex kernel/futex.c:3770 [inline] __se_sys_futex kernel/futex.c:3738 [inline] __x64_sys_futex+0x37c/0x4f0 kernel/futex.c:3738 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa532d3ccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000078bfa8 RCX: 000000000045c829 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000078bfac RBP: 000000000078bfa0 R08: 0000000000000009 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000078bfac R13: 00007ffd277dc0cf R14: 00007fa532d3d9c0 R15: 000000000078bfac