watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:10862] Modules linked in: irq event stamp: 2492799 hardirqs last enabled at (2492798): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2492799): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2469288): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2469291): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2469291): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 10862 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x53/0x1400 arch/x86/kernel/unwind_orc.c:397 Code: 5c 24 48 48 c7 44 24 50 a0 af b6 89 48 c1 eb 03 48 c7 44 24 58 f0 80 29 81 48 8d 04 13 c7 00 f1 f1 f1 f1 c7 40 04 00 f2 f2 f2 40 08 00 f2 f2 f2 c7 40 0c 00 f3 f3 f3 65 48 8b 04 25 28 00 00 RSP: 0018:ffff8880ba007338 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: ffffed1017400e70 RBX: 1ffff11017400e70 RCX: 000000000000000d RDX: dffffc0000000000 RSI: ffff8880ba0072c8 RDI: ffff8880ba007468 RBP: ffff8880ba0074e8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba0074c7 R11: 0000000000074071 R12: ffff8880ba007500 R13: 0000000000000000 R14: ffff8880ba007468 R15: 0000000000000028 FS: 00007f9d7902e700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2aa348fab4 CR3: 00000000b30d0000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x110/0x370 mm/slab.c:3557 kmem_cache_zalloc include/linux/slab.h:699 [inline] fill_pool lib/debugobjects.c:134 [inline] __debug_object_init+0x6d9/0x9b0 lib/debugobjects.c:379 debug_object_init lib/debugobjects.c:431 [inline] debug_object_activate+0x382/0x450 lib/debugobjects.c:512 debug_rcu_head_queue kernel/rcu/rcu.h:193 [inline] __call_rcu.constprop.0+0x31/0x7f0 kernel/rcu/tree.c:2977 dst_release net/core/dst.c:191 [inline] dst_release+0x79/0xb0 net/core/dst.c:181 refdst_drop include/net/dst.h:270 [inline] skb_dst_drop include/net/dst.h:282 [inline] skb_release_head_state+0x264/0x2c0 net/core/skbuff.c:621 skb_release_all net/core/skbuff.c:638 [inline] __kfree_skb net/core/skbuff.c:654 [inline] consume_skb+0xda/0x3d0 net/core/skbuff.c:714 igmp_rcv+0xdf9/0x2a20 net/ipv4/igmp.c:1129 ip_local_deliver_finish+0x495/0xc00 net/ipv4/ip_input.c:215 NF_HOOK include/linux/netfilter.h:289 [inline] ip_local_deliver+0x188/0x500 net/ipv4/ip_input.c:256 dst_input include/net/dst.h:461 [inline] ip_rcv_finish+0x1ca/0x2e0 net/ipv4/ip_input.c:414 NF_HOOK include/linux/netfilter.h:289 [inline] ip_rcv+0xca/0x3c0 net/ipv4/ip_input.c:524 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:unlock_page_memcg+0xa/0x30 mm/memcontrol.c:1963 Code: ff ff ff e8 68 9c f9 ff e9 3e ff ff ff e8 5e 9c f9 ff eb c1 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 b8 00 00 00 00 00 fc ff df <53> 48 89 fb 48 83 c7 38 48 89 fa 48 c1 ea 03 80 3c 02 00 75 0a 48 RSP: 0018:ffff8880aa8b7738 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff818fb155 RDX: 0000000000000000 RSI: ffffffff818fb11a RDI: ffffea0002763a00 RBP: ffffea0002763a00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dead000000000100 R15: 00007f9d79b09000 page_remove_rmap+0xe5/0x120 mm/rmap.c:1297 zap_pte_range mm/memory.c:1350 [inline] zap_pmd_range mm/memory.c:1463 [inline] zap_pud_range mm/memory.c:1492 [inline] zap_p4d_range mm/memory.c:1513 [inline] unmap_page_range+0x147d/0x2c50 mm/memory.c:1534 unmap_single_vma+0x198/0x300 mm/memory.c:1579 unmap_vmas+0xa9/0x180 mm/memory.c:1609 exit_mmap+0x2b9/0x530 mm/mmap.c:3093 __mmput kernel/fork.c:1016 [inline] mmput+0x14e/0x4a0 kernel/fork.c:1037 exit_mm kernel/exit.c:549 [inline] do_exit+0xaec/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9d7a6b8e99 Code: Bad RIP value. RSP: 002b:00007f9d7902e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f9d7a7cbf68 RCX: 00007f9d7a6b8e99 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9d7a7cbf68 RBP: 00007f9d7a7cbf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d7a7cbf6c R13: 00007fff55b989df R14: 00007f9d7902e300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10943 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x4/0x20 kernel/kcov.c:188 Code: 84 00 00 00 00 00 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 03 00 00 00 e9 ec fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 48 8b 0c 24 <89> f2 89 fe bf 05 00 00 00 e9 ce fe ff ff 66 66 2e 0f 1f 84 00 00 RSP: 0018:ffff8880ba107df8 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8880ba124cc0 RCX: ffffffff8154300a RDX: 1ffff1101742499a RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed1017424998 R10: ffff8880ba124cc3 R11: ffffffff8c66505b R12: 0000000000000000 R13: ffff8880a7e4c298 R14: ffff8880ba124d40 R15: dffffc0000000000 FS: 00007ff44620a700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c014c1a000 CR3: 00000000b30d0000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1478 [inline] __hrtimer_run_queues+0x46a/0xe60 kernel/time/hrtimer.c:1527 hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:preempt_count_add+0x85/0x190 kernel/sched/core.c:3238 Code: c3 03 65 01 2d cc 70 c0 7e 0f b6 04 02 38 c3 7c 08 84 c0 0f 85 da 00 00 00 8b 15 c6 c8 e2 0b 85 d2 75 11 65 8b 05 ab 70 c0 7e <0f> b6 c0 3d f4 00 00 00 7f 64 65 8b 05 9a 70 c0 7e 25 ff ff ff 7f RSP: 0018:ffff88808ebff4c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000080000201 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff89e5e2b8 R13: 000000000000e501 R14: 0000000000000000 R15: 0000000000000001 __raw_spin_lock include/linux/spinlock_api_smp.h:141 [inline] _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] nf_conntrack_lock net/netfilter/nf_conntrack_core.c:91 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:1896 [inline] nf_ct_iterate_cleanup+0x1dc/0x520 net/netfilter/nf_conntrack_core.c:1930 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2015 [inline] nf_ct_iterate_cleanup_net+0x113/0x170 net/netfilter/nf_conntrack_core.c:2000 masq_device_event+0xd6/0x110 net/ipv4/netfilter/nf_nat_masquerade_ipv4.c:100 notifier_call_chain+0xc0/0x230 kernel/notifier.c:93 call_netdevice_notifiers net/core/dev.c:1762 [inline] dev_close_many+0x323/0x670 net/core/dev.c:1514 rollback_registered_many+0x2f7/0xe70 net/core/dev.c:8173 rollback_registered+0xe9/0x1b0 net/core/dev.c:8238 unregister_netdevice_queue+0x1de/0x3e0 net/core/dev.c:9305 unregister_netdevice include/linux/netdevice.h:2615 [inline] __tun_detach+0x100d/0x1320 drivers/net/tun.c:745 tun_detach drivers/net/tun.c:762 [inline] tun_chr_close+0xd9/0x180 drivers/net/tun.c:3323 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff447894e99 Code: Bad RIP value. RSP: 002b:00007ff44620a218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007ff4479a7f68 RCX: 00007ff447894e99 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff4479a7f68 RBP: 00007ff4479a7f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4479a7f6c R13: 00007ffcc421bf1f R14: 00007ff44620a300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 5c pop %rsp 1: 24 48 and $0x48,%al 3: 48 c7 44 24 50 a0 af movq $0xffffffff89b6afa0,0x50(%rsp) a: b6 89 c: 48 c1 eb 03 shr $0x3,%rbx 10: 48 c7 44 24 58 f0 80 movq $0xffffffff812980f0,0x58(%rsp) 17: 29 81 19: 48 8d 04 13 lea (%rbx,%rdx,1),%rax 1d: c7 00 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rax) 23: c7 40 04 00 f2 f2 f2 movl $0xf2f2f200,0x4(%rax) * 2a: c7 40 08 00 f2 f2 f2 movl $0xf2f2f200,0x8(%rax) <-- trapping instruction 31: c7 40 0c 00 f3 f3 f3 movl $0xf3f3f300,0xc(%rax) 38: 65 gs 39: 48 rex.W 3a: 8b .byte 0x8b 3b: 04 25 add $0x25,%al 3d: 28 00 sub %al,(%rax)