watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.1:15819] Modules linked in: irq event stamp: 17599305 hardirqs last enabled at (17599304): [] asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:655 hardirqs last disabled at (17599305): [] sysvec_apic_timer_interrupt+0xc/0x100 arch/x86/kernel/apic/apic.c:1096 softirqs last enabled at (10941242): [] asm_call_irq_on_stack+0xf/0x20 softirqs last disabled at (10941245): [] asm_call_irq_on_stack+0xf/0x20 CPU: 1 PID: 15819 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:slab_want_init_on_alloc mm/slab.h:601 [inline] RIP: 0010:slab_alloc_node mm/slub.c:2889 [inline] RIP: 0010:kmem_cache_alloc_node+0x2b2/0x470 mm/slub.c:2928 Code: 45 89 e1 41 55 4c 89 f2 e8 fb d7 eb ff 58 65 ff 0d 43 96 4c 7e 0f 85 6c ff ff ff e8 e7 eb 4a ff e9 62 ff ff ff 48 83 7d 48 00 <0f> 85 10 ff ff ff f7 45 08 00 08 08 00 74 0d 41 f7 c4 00 01 00 00 RSP: 0018:ffffc90000db0b88 EFLAGS: 00000246 RAX: ffff8880475a6000 RBX: 0000000000000a20 RCX: ffffffff81585217 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffff8880118c5c80 R08: ffff8880475a6000 R09: ffffffff8f86685f R10: fffffbfff1f0cd0b R11: 0000000000000100 R12: 0000000000000a20 R13: 00000000ffffffff R14: 0000000000000000 R15: ffffffff86f191a1 FS: 00007f5b2df82700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001040 CR3: 0000000015832000 CR4: 0000000000350ee0 Call Trace: __alloc_skb+0x71/0x5a0 net/core/skbuff.c:198 alloc_skb include/linux/skbuff.h:1099 [inline] ndisc_alloc_skb+0x134/0x320 net/ipv6/ndisc.c:420 ndisc_send_rs+0x388/0x700 net/ipv6/ndisc.c:686 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3875 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1417 expire_timers kernel/time/timer.c:1462 [inline] __run_timers.part.0+0x67c/0xa50 kernel/time/timer.c:1731 __run_timers kernel/time/timer.c:1712 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1744 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191 Code: f8 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 4a e8 5b f8 48 89 ef e8 f2 9c 5c f8 f6 c7 02 75 1a 53 9d 01 00 00 00 e8 31 a4 50 f8 65 8b 05 2a 0a 05 77 85 c0 74 0a 5b RSP: 0018:ffffc9000271fa40 EFLAGS: 00000202 RAX: 0000000000000155 RBX: 0000000000000202 RCX: 1ffffffff1b46a09 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8880610008a8 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8178a418 R11: 0000000000000001 R12: ffff8880b9c34c40 R13: 0000000000000202 R14: ffff8880610008a8 R15: ffff8880b9c34c58 try_to_wake_up+0x62d/0x14a0 kernel/sched/core.c:3470 wake_up_process kernel/sched/core.c:3538 [inline] wake_up_q+0x96/0x100 kernel/sched/core.c:589 futex_wake+0x3e9/0x490 kernel/futex.c:1630 do_futex+0x326/0x1700 kernel/futex.c:3741 __do_sys_futex+0x2a2/0x470 kernel/futex.c:3799 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 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:00007f5b2df82218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 000000000056bf68 RCX: 0000000000465b09 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 000000000056bf6c RBP: 000000000056bf60 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf6c R13: 00007ffda0417dff R14: 00007f5b2df82300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15818 Comm: syz-executor.0 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110 Code: c7 a0 9a 13 8f e8 c8 a2 84 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 f6 75 2c 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc900000079d0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff8ae6f8a0 RCX: 1ffff11017383fe8 RDX: 1ffffffff15cdf14 RSI: 0000000000000000 RDI: 00000000000000b0 RBP: ffffc90000007a08 R08: ffffffff8f145018 R09: ffffffff8f14500f R10: ffffffff8f145017 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f5467d0b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c000f18000 CR3: 00000000152e8000 CR4: 0000000000350ef0 Call Trace: apic_eoi arch/x86/include/asm/apic.h:408 [inline] ack_APIC_irq arch/x86/include/asm/apic.h:454 [inline] __sysvec_irq_work+0x4b/0x3d0 arch/x86/kernel/irq_work.c:19 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_irq_work+0x48/0x100 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:655 RIP: 0010:__slab_alloc.constprop.0+0x55/0xe0 mm/slub.c:2784 Code: b1 4b 45 07 83 f8 07 89 c2 77 6e 48 03 1c d5 c0 f6 e6 8a 4c 89 f9 44 89 f2 44 89 ee 48 89 ef 49 89 d8 e8 ce f3 ff ff 41 54 9d <48> 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 97 5b c3 ff 48 8b RSP: 0018:ffffc90000007ab8 EFLAGS: 00000296 RAX: ffff888054199000 RBX: ffff8880b9c3c3a0 RCX: ffffffff81585217 RDX: 0000000000000000 RSI: 0000000000000102 RDI: 0000000000000000 RBP: ffff8880118c5c80 R08: 0000000000000001 R09: ffffffff8f866807 R10: fffffbfff1f0cd00 R11: 0000000000000100 R12: 0000000000000296 R13: 0000000000000a20 R14: 00000000ffffffff R15: ffffffff86f191a1 slab_alloc_node mm/slub.c:2857 [inline] kmem_cache_alloc_node+0x389/0x470 mm/slub.c:2928 __alloc_skb+0x71/0x5a0 net/core/skbuff.c:198 skb_copy+0x137/0x2f0 net/core/skbuff.c:1523 mac80211_hwsim_tx_frame_no_nl.isra.0+0xb17/0x1330 drivers/net/wireless/mac80211_hwsim.c:1493 mac80211_hwsim_tx_frame+0x14f/0x1e0 drivers/net/wireless/mac80211_hwsim.c:1705 mac80211_hwsim_beacon_tx+0x4ba/0x910 drivers/net/wireless/mac80211_hwsim.c:1759 __iterate_interfaces+0x1e5/0x520 net/mac80211/util.c:793 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:829 mac80211_hwsim_beacon+0xd5/0x1a0 drivers/net/wireless/mac80211_hwsim.c:1782 __run_hrtimer kernel/time/hrtimer.c:1519 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1583 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1600 __do_softirq+0x29b/0x9f6 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu kernel/softirq.c:420 [inline] irq_exit_rcu+0x134/0x200 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:preempt_schedule_irq+0x49/0x90 kernel/sched/core.c:5340 Code: 55 53 65 48 8b 1c 25 00 f0 01 00 48 89 dd 48 c1 ed 03 48 01 c5 bf 01 00 00 00 e8 62 94 51 f8 e8 ad 9c 7c f8 fb bf 01 00 00 00 02 d1 ff ff 9c 58 fa f6 c4 02 75 27 bf 01 00 00 00 e8 70 82 51 RSP: 0018:ffffc9000270fc28 EFLAGS: 00000206 RAX: 0000000000940fa3 RBX: ffff888031173780 RCX: 1ffffffff1b46a09 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffffed100622e6f0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8178a418 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline] irqentry_exit_cond_resched kernel/entry/common.c:385 [inline] irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:197 Code: 00 00 00 4d 8b 0b 48 0f bd c8 49 8b 14 24 48 63 c9 e9 66 ff ff ff 4c 01 ca 49 89 13 e9 00 fd ff ff 66 0f 1f 84 00 00 00 00 00 <65> 8b 05 59 1e 8f 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9000270fcf0 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000040000 RDX: 0000000000000000 RSI: ffff888031173780 RDI: 0000000000000003 RBP: 0000000000040000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff86ef7465 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000020000180 R14: 0000000000000400 R15: 00000000000003ff __sys_sendmmsg+0x176/0x470 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2515 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 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:00007f5467d0b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 03f052c333fb6a28 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffea93b0c5f R14: 00007f5467d0b300 R15: 0000000000022000