watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor.0:11507] Modules linked in: irq event stamp: 5698021 hardirqs last enabled at (5698020): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (5698021): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (5694296): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (5694299): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (5694299): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 1 PID: 11507 Comm: syz-executor.0 Not tainted 4.14.277-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888098286580 task.stack: ffff888097c88000 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:41 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:276 [inline] RIP: 0010:deref_stack_reg+0x8d/0x1a0 arch/x86/kernel/unwind_orc.c:286 RSP: 0018:ffff8880ba506bb8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: 1ffff110174a0d78 RCX: ffffffff8a69e408 RDX: 1ffff110174a0db2 RSI: ffff8880ba506df8 RDI: ffff8880ba506d90 RBP: ffff8880ba506df8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba506e08 R11: 0000000000000001 R12: ffff8880ba506d88 R13: ffff8880ba506dc8 R14: ffff8880ba506dd8 R15: ffff8880ba506d88 FS: 00007f188bac5700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556589848 CR3: 00000000a5ba5000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xfcc/0x17d0 arch/x86/kernel/unwind_orc.c:474 __unwind_start+0x594/0x930 arch/x86/kernel/unwind_orc.c:583 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x63/0x160 arch/x86/kernel/stacktrace.c:43 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_node_trace+0x153/0x400 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] pskb_expand_head+0x128/0xd30 net/core/skbuff.c:1471 __skb_cow include/linux/skbuff.h:2973 [inline] skb_cow_head include/linux/skbuff.h:3007 [inline] ip_tunnel_xmit+0xe3e/0x33e0 net/ipv4/ip_tunnel.c:792 sit_tunnel_xmit__ net/ipv6/sit.c:1006 [inline] sit_tunnel_xmit+0x1ab/0x2130 net/ipv6/sit.c:1019 __netdev_start_xmit include/linux/netdevice.h:4054 [inline] netdev_start_xmit include/linux/netdevice.h:4063 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 neigh_output include/net/neighbour.h:500 [inline] ip_finish_output2+0xba6/0x1340 net/ipv4/ip_output.c:237 ip_finish_output+0x37c/0xc50 net/ipv4/ip_output.c:325 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip_output+0x1cd/0x510 net/ipv4/ip_output.c:413 dst_output include/net/dst.h:470 [inline] ip_local_out+0x93/0x170 net/ipv4/ip_output.c:125 nf_dup_ipv4 net/ipv4/netfilter/nf_dup_ipv4.c:91 [inline] nf_dup_ipv4+0x4bb/0x680 net/ipv4/netfilter/nf_dup_ipv4.c:53 tee_tg4+0x109/0x160 net/netfilter/xt_TEE.c:36 ipt_do_table+0xa9d/0x16f0 net/ipv4/netfilter/ip_tables.c:353 iptable_filter_hook+0x172/0x1e0 net/ipv4/netfilter/iptable_filter.c:47 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline] nf_hook_slow+0xb0/0x1a0 net/netfilter/core.c:468 nf_hook include/linux/netfilter.h:205 [inline] NF_HOOK include/linux/netfilter.h:248 [inline] ip_local_deliver+0x28c/0x460 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:476 [inline] ip_rcv_finish+0x6e3/0x19f0 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:250 [inline] ip_rcv+0x8a7/0xf10 net/ipv4/ip_input.c:493 __netif_receive_skb_core+0x15ee/0x2a30 net/core/dev.c:4474 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512 process_backlog+0x218/0x6f0 net/core/dev.c:5195 napi_poll net/core/dev.c:5604 [inline] net_rx_action+0x466/0xfd0 net/core/dev.c:5670 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:pte_val arch/x86/include/asm/paravirt.h:384 [inline] RIP: 0010:pte_pfn arch/x86/include/asm/pgtable.h:194 [inline] RIP: 0010:_vm_normal_page+0x78/0x3b0 mm/memory.c:855 RSP: 0018:ffff888097c8f778 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffff11012f91ef5 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00007f188c536000 RDI: ffff88809cee3b98 RBP: 1ffff11012f91ef1 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff888098286580 R12: 8000000095231007 R13: ffff88809cee3b98 R14: 00007f188c536000 R15: ffff888097c8f7a8 zap_pte_range mm/memory.c:1348 [inline] zap_pmd_range mm/memory.c:1479 [inline] zap_pud_range mm/memory.c:1508 [inline] zap_p4d_range mm/memory.c:1529 [inline] unmap_page_range+0xcdf/0x1d90 mm/memory.c:1550 unmap_single_vma+0x147/0x2b0 mm/memory.c:1595 unmap_vmas+0x9d/0x160 mm/memory.c:1625 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode+0x1af/0x210 arch/x86/entry/common.c:199 retint_user+0x8/0x18 RIP: 0033:0x7f188d0f6fcd RSP: 002b:00007f188bac5190 EFLAGS: 00010206 RAX: 00000000000034d0 RBX: 00007f188d262f60 RCX: 00007f188d1aa08d RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000005 RBP: 00007f188d1aa08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8b88bf1f R14: 00007f188bac5300 R15: 0000000000022000 Code: 08 3c 03 0f 8e fa 00 00 00 41 8b 04 24 85 c0 74 62 49 8d 7c 24 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 e6 00 00 00 49 8d 7c 24 10 4d 8b 74 24 08 48 b8 00 00 00 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11525 Comm: syz-executor.4 Not tainted 4.14.277-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888092166280 task.stack: ffff8880b4e60000 RIP: 0010:__sanitizer_cov_trace_pc+0x15/0x50 kernel/kcov.c:65 RSP: 0018:ffff8880ba4073e8 EFLAGS: 00000082 RAX: ffff888092166280 RBX: ffffffff88f091e0 RCX: 0000000000000000 RDX: 0000000000010301 RSI: 0000000000000000 RDI: ffffffff88f091e0 RBP: fffffbfff11e1310 R08: ffffffff8b9d7858 R09: 0000000000000003 R10: 0000000000000000 R11: ffff888092166280 R12: dffffc0000000000 R13: 1ffffffff11e1312 R14: 0000000000006f80 R15: 00000026dc2d2b68 FS: 00007fb830d0a700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056004c8f18c8 CR3: 00000000b078a000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_smp_processor_id+0x5/0x20 lib/smp_processor_id.c:57 kvm_clock_read+0xc/0x30 arch/x86/kernel/kvmclock.c:86 tk_clock_read kernel/time/timekeeping.c:144 [inline] timekeeping_get_delta kernel/time/timekeeping.c:238 [inline] timekeeping_get_ns kernel/time/timekeeping.c:344 [inline] ktime_get+0x15e/0x2c0 kernel/time/timekeeping.c:762 clockevents_program_event+0x108/0x2d0 kernel/time/clockevents.c:331 tick_program_event+0x78/0xd0 kernel/time/tick-oneshot.c:47 hrtimer_interrupt+0x336/0x5e0 kernel/time/hrtimer.c:1334 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline] smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1104 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:slab_alloc_node mm/slab.c:3327 [inline] RIP: 0010:kmem_cache_alloc_node_trace+0x304/0x400 mm/slab.c:3659 RSP: 0018:ffff8880ba407620 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: 0000000001090220 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888092166b58 RDI: 0000000000000286 RBP: ffff88813fe74c40 R08: ffffffff8b9dcb88 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888065e41480 R13: 0000000001090220 R14: 0000000000000480 R15: ffff88813fe74c40 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 __pskb_copy_fclone+0x100/0xc90 net/core/skbuff.c:1395 __pskb_copy include/linux/skbuff.h:1034 [inline] pskb_copy include/linux/skbuff.h:2932 [inline] nf_dup_ipv4 net/ipv4/netfilter/nf_dup_ipv4.c:65 [inline] nf_dup_ipv4+0x105/0x680 net/ipv4/netfilter/nf_dup_ipv4.c:53 tee_tg4+0x109/0x160 net/netfilter/xt_TEE.c:36 ipt_do_table+0xa9d/0x16f0 net/ipv4/netfilter/ip_tables.c:353 iptable_filter_hook+0x172/0x1e0 net/ipv4/netfilter/iptable_filter.c:47 nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline] nf_hook_slow+0xb0/0x1a0 net/netfilter/core.c:468 nf_hook include/linux/netfilter.h:205 [inline] NF_HOOK include/linux/netfilter.h:248 [inline] ip_local_deliver+0x28c/0x460 net/ipv4/ip_input.c:257 dst_input include/net/dst.h:476 [inline] ip_rcv_finish+0x6e3/0x19f0 net/ipv4/ip_input.c:396 NF_HOOK include/linux/netfilter.h:250 [inline] ip_rcv+0x8a7/0xf10 net/ipv4/ip_input.c:493 __netif_receive_skb_core+0x15ee/0x2a30 net/core/dev.c:4474 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512 process_backlog+0x218/0x6f0 net/core/dev.c:5195 napi_poll net/core/dev.c:5604 [inline] net_rx_action+0x466/0xfd0 net/core/dev.c:5670 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:150 [inline] RIP: 0010:qlist_free_all+0xfc/0x140 mm/kasan/quarantine.c:166 RSP: 0018:ffff8880b4e67778 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000007 RBX: ffff8880af2dc040 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff888092166b08 RDI: 0000000000000286 RBP: 0000000000000000 R08: 0000000000000060 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809b8e3580 R13: ffff8880b4e677b0 R14: ffff88813fe74ac0 R15: 0000000000000286 quarantine_reduce+0x185/0x200 mm/kasan/quarantine.c:259 kasan_kmalloc+0xa2/0x160 mm/kasan/kasan.c:536 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550 kmem_cache_zalloc include/linux/slab.h:651 [inline] taskstats_tgid_alloc kernel/taskstats.c:579 [inline] taskstats_exit+0x5f3/0xb50 kernel/taskstats.c:618 do_exit+0x52c/0x2850 kernel/exit.c:853 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fb8323950e9 RSP: 002b:00007fb830d0a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 00000000000034d0 RBX: 00007fb8324a7f60 RCX: 00007fb8323950e9 RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000005 RBP: 00007fb8323ef08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb2538fbf R14: 00007fb830d0a300 R15: 0000000000022000 Code: 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 48 85 c0 74 1a 65 8b 15 9b 38 ad 7e <81> e2 00 01 1f 00 75 0b 8b 90 58 13 00 00 83 fa 01 74 01 c3 48 ---------------- Code disassembly (best guess): 0: 08 3c 03 or %bh,(%rbx,%rax,1) 3: 0f 8e fa 00 00 00 jle 0x103 9: 41 8b 04 24 mov (%r12),%eax d: 85 c0 test %eax,%eax f: 74 62 je 0x73 11: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 48 89 fa mov %rdi,%rdx 23: 48 c1 ea 03 shr $0x3,%rdx 27: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2b: 0f 85 e6 00 00 00 jne 0x117 <-- trapping instruction 31: 49 8d 7c 24 10 lea 0x10(%r12),%rdi 36: 4d 8b 74 24 08 mov 0x8(%r12),%r14 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)