watchdog: BUG: soft lockup - CPU#1 stuck for 124s! [syz-executor.2:15869] Modules linked in: irq event stamp: 9358896 hardirqs last enabled at (9358895): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 hardirqs last disabled at (9358896): [] idtentry_enter_cond_rcu+0x2e/0x50 arch/x86/entry/common.c:649 softirqs last enabled at (332): [] do_ip_setsockopt+0x1ac4/0x3500 net/ipv4/ip_sockglue.c:1246 softirqs last disabled at (330): [] spin_lock_bh include/linux/spinlock.h:358 [inline] softirqs last disabled at (330): [] release_sock+0x2c/0x1c0 net/core/sock.c:3064 CPU: 1 PID: 15869 Comm: syz-executor.2 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x302/0x450 kernel/smp.c:382 Code: 2f 44 89 ee 83 e6 01 31 ff e8 7a 04 0b 00 41 83 e5 01 75 14 e8 5f 00 0b 00 eb 45 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 0d 41 f6 07 01 74 22 e8 3a 00 0b 00 eb e8 RSP: 0018:ffffc90008867da0 EFLAGS: 00000246 RAX: ffffffff81698be6 RBX: 1ffff9200110cfb9 RCX: 0000000000040000 RDX: ffffc9000d681000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90008867e28 R08: ffffffff81698bb6 R09: ffffed1015d06d11 R10: ffffed1015d06d11 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffffc90008867dc8 FS: 00007f43fb828700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056041bd83128 CR3: 00000000a8e39000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many kernel/smp.c:577 [inline] smp_call_function kernel/smp.c:599 [inline] on_each_cpu+0x4d/0x1f0 kernel/smp.c:699 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872 do_settimeofday64+0x41e/0x520 kernel/time/timekeeping.c:1257 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline] __x64_sys_clock_settime+0x196/0x1c0 kernel/time/posix-timers.c:1067 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cba9 Code: Bad RIP value. RSP: 002b:00007f43fb827c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00000000004dbbc0 RCX: 000000000045cba9 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000007b R14: 00000000004c352c R15: 00007f43fb8286d4 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6795 Comm: syz-fuzzer Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline] RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:316 [inline] RIP: 0010:rcu_is_watching+0x51/0x90 kernel/rcu/tree.c:1097 Code: 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 34 d5 51 00 48 c7 c3 98 67 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 8a 04 38 <84> c0 75 1d 8b 03 65 ff 0d 9e 42 a0 7e 74 0b 83 e0 02 d1 e8 5b 41 RSP: 0000:ffffc90001577ca8 EFLAGS: 00000806 RAX: 1ffff11015d06c00 RBX: ffff8880ae836798 RCX: ffff888095f60500 RDX: ffff888095f60500 RSI: 0000000000010002 RDI: 0000000000000000 RBP: ffff888095f60db8 R08: ffffffff816549bb R09: fffffbfff12da576 R10: fffffbfff12da576 R11: 0000000000000000 R12: ffff88805a687340 R13: 1ffff11015d04ed2 R14: ffffffff890d18e0 R15: dffffc0000000000 FS: 000000c00015c790(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffcd5aa8f1c CR3: 00000000a94b6000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:118 [inline] rcu_read_lock_sched_held+0x11/0xa0 kernel/rcu/update.c:133 trace_hrtimer_expire_exit+0x21b/0x2b0 include/trace/events/timer.h:279 __run_hrtimer kernel/time/hrtimer.c:1523 [inline] __hrtimer_run_queues+0x4a7/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline] sysvec_apic_timer_interrupt+0x112/0x130 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587 RIP: 0033:0x780c0c Code: Bad RIP value. RSP: 002b:000000c008cf9538 EFLAGS: 00000216 RAX: 000000000000001b RBX: 0000000000000072 RCX: 000000000000002b RDX: 000000c008cf9720 RSI: 000000c0089c2050 RDI: 000000c008a8dfa8 RBP: 000000c008cf96c0 R08: 0000000000000002 R09: 000000c0089c2040 R10: 0000000000000004 R11: 00000000000000df R12: 0000000000000003 R13: 01ffffffffffffff R14: 0000000000ac4744 R15: 0000000000000039