watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.3:13462] Modules linked in: irq event stamp: 2631177 hardirqs last enabled at (2631176): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2631177): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2281908): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2281911): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2281911): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 13462 Comm: syz-executor.3 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+0x74d/0x1400 arch/x86/kernel/unwind_orc.c:437 Code: 89 ff 4c 89 44 24 30 48 89 4c 24 28 e8 2c de 6e 00 4c 8b 44 24 30 48 8b 4c 24 28 e9 06 ff ff ff 48 b8 00 00 00 00 00 fc ff df <48> 8b 14 24 48 c1 ea 03 80 3c 02 00 0f 85 c4 09 00 00 4c 89 f8 49 RSP: 0018:ffff8880ba0068c0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017400d21 RCX: ffffffff8bfeeb3f RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000002 R08: ffffffff8bfeeb3e R09: ffffffff8bfeeb3a R10: ffff8880ba006a4f R11: 0000000000074071 R12: ffff8880ba006a38 R13: ffff8880ba006a25 R14: ffff8880ba0069f0 R15: ffffffff8bfeeb3a FS: 00007ff0851bf700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc73cd40018 CR3: 00000000ae9dc000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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 __do_kmalloc mm/slab.c:3727 [inline] __kmalloc+0x15a/0x3c0 mm/slab.c:3736 kmalloc include/linux/slab.h:520 [inline] kzalloc include/linux/slab.h:709 [inline] neigh_alloc net/core/neighbour.c:326 [inline] __neigh_create+0x218/0x1c40 net/core/neighbour.c:501 ip6_finish_output2+0x8cc/0x2290 net/ipv6/ip6_output.c:117 ip6_finish_output+0x89b/0x10f0 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip6_output+0x205/0x770 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:455 [inline] NF_HOOK include/linux/netfilter.h:289 [inline] ip6_xmit+0xdbf/0x20a0 net/ipv6/ip6_output.c:313 sctp_v6_xmit+0x377/0x710 net/sctp/ipv6.c:229 sctp_packet_transmit+0x1e21/0x3660 net/sctp/output.c:641 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1489 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0xc9d/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_endpoint_bh_rcv+0x405/0x880 net/sctp/endpointola.c:457 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_rcv+0x1642/0x3300 net/sctp/input.c:268 sctp6_rcv+0x12/0x30 net/sctp/ipv6.c:1072 ip6_input_finish+0x46a/0x17a0 net/ipv6/ip6_input.c:385 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xcf/0x3c0 net/ipv6/ip6_input.c:428 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x1d9/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 __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:__sanitizer_cov_trace_pc+0x27/0x50 kernel/kcov.c:104 Code: 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 83 fa 02 75 20 <48> 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 48 39 RSP: 0018:ffff888056876be0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88804ae62180 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff83772075 RDI: 0000000000000001 RBP: ffff888056876cb8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff888056876ed7 R11: 0000000000074071 R12: dffffc0000000000 R13: 000000000002b0c0 R14: dffffc0000000000 R15: 000000000002b0c0 debug_smp_processor_id+0x5/0x20 lib/smp_processor_id.c:56 __schedule+0x7b/0x2040 kernel/sched/core.c:3435 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3641 ___preempt_schedule+0x16/0x18 unwind_next_frame+0xf07/0x1400 arch/x86/kernel/unwind_orc.c:579 __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_timer_init kernel/time/timer.c:713 [inline] debug_init kernel/time/timer.c:766 [inline] init_timer_key+0x33/0x350 kernel/time/timer.c:815 sctp_transport_init net/sctp/transport.c:90 [inline] sctp_transport_new+0x50a/0x710 net/sctp/transport.c:115 sctp_assoc_add_peer+0x2a6/0x1050 net/sctp/associola.c:636 sctp_process_param net/sctp/sm_make_chunk.c:2553 [inline] sctp_process_init+0x250a/0x2b60 net/sctp/sm_make_chunk.c:2373 sctp_cmd_process_init net/sctp/sm_sideeffect.c:682 [inline] sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1391 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x173e/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x345/0x650 net/sctp/associola.c:1073 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x1e9/0x11e0 net/sctp/input.c:356 sk_backlog_rcv include/net/sock.h:952 [inline] __release_sock+0x134/0x3a0 net/core/sock.c:2362 release_sock+0x54/0x1b0 net/core/sock.c:2901 sctp_wait_for_connect+0x301/0x530 net/sctp/socket.c:8635 __sctp_connect+0xb6e/0xd00 net/sctp/socket.c:1273 __sctp_setsockopt_connectx+0x132/0x1c0 net/sctp/socket.c:1381 sctp_setsockopt_connectx_old net/sctp/socket.c:1397 [inline] sctp_setsockopt+0x29d9/0x4b40 net/sctp/socket.c:4354 __sys_setsockopt+0x14d/0x240 net/socket.c:2013 __do_sys_setsockopt net/socket.c:2024 [inline] __se_sys_setsockopt net/socket.c:2021 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:2021 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff087c49ae9 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:00007ff0851bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ff087d5cf60 RCX: 00007ff087c49ae9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007ff087ca3f6d R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6752a1bf R14: 00007ff0851bf300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 13475 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:rcu_read_unlock_sched_notrace include/linux/rcupdate.h:771 [inline] RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x2fb/0x3c0 kernel/locking/lockdep.c:3907 Code: fe ff ff 65 ff 05 d5 89 b6 7e 48 8b 05 06 86 c3 09 e8 69 48 05 00 85 c0 74 09 80 3d a1 35 c3 09 00 74 3f 65 ff 0d b5 89 b6 7e <0f> 85 3e fe ff ff e8 8c e7 b4 ff e9 34 fe ff ff 0f 0b 0f 0b 0f 0b RSP: 0018:ffff8880ba106bd8 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff888056216340 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffff888056216bc4 RBP: ffffffff89f95488 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000001 FS: 00007f9e3a389700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559b37b930e8 CR3: 00000000a0e7c000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] ktime_get+0xd0/0x2f0 kernel/time/timekeeping.c:756 hrtimer_forward_now include/linux/hrtimer.h:479 [inline] perf_swevent_hrtimer+0x318/0x3e0 kernel/events/core.c:9266 __run_hrtimer kernel/time/hrtimer.c:1465 [inline] __hrtimer_run_queues+0x3f6/0xe60 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:debug_lockdep_rcu_enabled+0x0/0xe0 kernel/rcu/update.c:253 Code: ff ff 48 89 ef e8 90 c4 47 00 e9 fa fd ff ff 48 89 ef e8 83 c4 47 00 e9 62 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> c7 c0 44 e0 26 8b 53 48 ba 00 00 00 00 00 fc ff df 48 89 c1 83 RSP: 0018:ffff8880ba1071e0 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffffffff8afda0e0 RCX: baa16d92739d1398 RDX: dffffc0000000000 RSI: 00000000cfa653ce RDI: 0000000000000286 RBP: ffff8880563ea700 R08: 00000000ac4c9fb3 R09: 0000000000000003 R10: ffff888056216c40 R11: 0000000000000000 R12: ffff8880aa902000 R13: ffff888056edac00 R14: ffff8880b5b8a930 R15: 0000000000000000 rcu_read_lock include/linux/rcupdate.h:628 [inline] __ip_queue_xmit+0x76/0x1c10 net/ipv4/ip_output.c:442 sctp_packet_transmit+0x1e21/0x3660 net/sctp/output.c:641 sctp_outq_flush_transports+0x19d/0x340 net/sctp/outqueue.c:1166 sctp_outq_flush net/sctp/outqueue.c:1214 [inline] sctp_outq_uncork+0x185/0x200 net/sctp/outqueue.c:777 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1815 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x72a/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_assoc_bh_rcv+0x345/0x650 net/sctp/associola.c:1073 sctp_inq_push+0x1da/0x270 net/sctp/inqueue.c:95 sctp_rcv+0x1642/0x3300 net/sctp/input.c:268 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:page_zonenum include/linux/mm.h:850 [inline] RIP: 0010:is_zone_device_page include/linux/mm.h:856 [inline] RIP: 0010:release_pages+0x118/0x15a0 mm/swap.c:743 Code: 8b 05 14 5b a5 09 49 39 c5 0f 84 10 09 00 00 e8 9e f5 e0 ff 4c 89 e8 48 c1 e8 03 42 80 3c 38 00 0f 85 f0 11 00 00 4d 8b 65 00 <4d> 8d 75 08 bf 04 00 00 00 49 c1 ec 37 41 83 e4 07 44 89 e6 e8 df RSP: 0018:ffff88804ddf7688 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffd4000492908 RBX: 0000000000000117 RCX: ffffffff818198f4 RDX: 0000000000000000 RSI: ffffffff81818fd2 RDI: 0000000000000004 RBP: 0000000000000000 R08: 0000000000000001 R09: 00000000000001fe R10: 0000000000000004 R11: 0000000000000000 R12: 00fff00000000000 R13: ffffea0002494840 R14: 00000000000001fe R15: dffffc0000000000 tlb_flush_mmu_free mm/memory.c:261 [inline] zap_pte_range mm/memory.c:1417 [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+0x221f/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: 0033:0x7f9e3ce13ae9 Code: Bad RIP value. RSP: 002b:00007f9e3a389188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: fffffffffffffe00 RBX: 00007f9e3cf26f60 RCX: 00007f9e3ce13ae9 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000006 RBP: 00007f9e3ce6df6d R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcbc1c0a6f R14: 00007f9e3a389300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 89 ff mov %edi,%edi 2: 4c 89 44 24 30 mov %r8,0x30(%rsp) 7: 48 89 4c 24 28 mov %rcx,0x28(%rsp) c: e8 2c de 6e 00 callq 0x6ede3d 11: 4c 8b 44 24 30 mov 0x30(%rsp),%r8 16: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx 1b: e9 06 ff ff ff jmpq 0xffffff26 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 8b 14 24 mov (%rsp),%rdx <-- trapping instruction 2e: 48 c1 ea 03 shr $0x3,%rdx 32: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 36: 0f 85 c4 09 00 00 jne 0xa00 3c: 4c 89 f8 mov %r15,%rax 3f: 49 rex.WB