watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.1:15056] Modules linked in: irq event stamp: 2282357 hardirqs last enabled at (2282356): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2282357): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2194498): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2194501): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2194501): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 15056 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:44 [inline] RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:321 [inline] RIP: 0010:deref_stack_reg+0x54/0x1d0 arch/x86/kernel/unwind_orc.c:331 Code: 5c 24 08 48 c7 44 24 10 35 af b6 89 48 c1 eb 03 48 c7 44 24 18 20 7f 29 81 48 8d 14 03 c7 02 f1 f1 f1 f1 c7 42 04 00 f3 f3 f3 <48> 89 fa 65 48 8b 0c 25 28 00 00 00 48 89 4c 24 60 31 c9 48 c1 ea RSP: 0018:ffff8880ba006dc8 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017400dba RCX: ffffffff8c069c53 RDX: ffffed1017400dba RSI: ffff88808eb173e8 RDI: ffff8880ba006f90 RBP: ffff88808eb173e8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba006fef R11: 0000000000074071 R12: ffff8880ba006f90 R13: ffff8880ba006fd0 R14: ffff8880ba006f90 R15: ffffffff8c069c4e FS: 00007f10f0d83700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3f33cdc718 CR3: 00000000a4908000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xf83/0x1400 arch/x86/kernel/unwind_orc.c:555 __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 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] sctp_packet_transmit+0x246/0x3660 net/sctp/output.c:584 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 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:__schedule+0x0/0x2040 kernel/sched/core.c:3428 Code: 80 f9 eb da e8 51 28 80 f9 e9 4e ff ff ff e8 d7 24 80 f9 e9 08 ff ff ff e8 1d 27 80 f9 e9 6f ff ff ff 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 57 48 8d 85 78 ff ff ff 41 56 49 be 00 00 00 00 00 RSP: 0018:ffff88808eb16ea8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff110122a31e5 RDX: 0000000000000000 RSI: ffff888091518f30 RDI: 0000000000000001 RBP: ffffed10122a30d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888091518680 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3744 retint_kernel+0x1b/0x2d RIP: 0010:should_resched arch/x86/include/asm/preempt.h:99 [inline] RIP: 0010:__local_bh_enable_ip+0x18d/0x270 kernel/softirq.c:196 Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 dd 00 00 00 48 83 3d c8 5f b8 08 00 0f 84 8d 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 6c bc c8 7e 85 c0 74 7d 5b 5d 41 5c c3 80 3d f3 87 d5 09 RSP: 0018:ffff88808eb16f80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: 0000000000000200 RCX: 1ffff110122a31e5 RDX: dffffc0000000000 RSI: ffff888091518f30 RDI: ffff888091518f04 RBP: ffffffff870217f6 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888091518680 R13: 0000000000000010 R14: 000000000000000e R15: ffff88809fbad040 local_bh_enable include/linux/bottom_half.h:32 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:721 [inline] ip6_finish_output2+0x11a9/0x2290 net/ipv6/ip6_output.c:121 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_packet_singleton net/sctp/outqueue.c:792 [inline] sctp_outq_flush_ctrl.constprop.0+0x6d3/0xc40 net/sctp/outqueue.c:923 sctp_outq_flush net/sctp/outqueue.c:1205 [inline] sctp_outq_uncork+0x10b/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_primitive_ASSOCIATE+0x98/0xc0 net/sctp/primitive.c:88 __sctp_connect+0x968/0xd00 net/sctp/socket.c:1258 __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: 0033:0x7f10f380da39 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:00007f10f0d83188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f10f3910f60 RCX: 00007f10f380da39 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00007f10f3867c5f R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff958072ef R14: 00007f10f0d83300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 15090 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:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97 Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 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 RSP: 0018:ffff8880ba107a80 EFLAGS: 00000006 RAX: ffff8880aedba2c0 RBX: ffffffff8a45f160 RCX: 0000000000000001 RDX: 0000000000010100 RSI: ffffffff88b3e0e0 RDI: ffffffff88b3e120 RBP: ffffffff88b3e120 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: ffff88808ebceba8 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f9d1b93e700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555561aa848 CR3: 000000009d82b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x3ca/0x550 arch/x86/kernel/apic/apic.c:1097 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff8880ba107be0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff1101562cab9 RDX: 0000000000000001 RSI: ffffffff8167a995 RDI: 0000000000000286 RBP: ffff8880ab1655c8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000006f1e R13: ffffed101562cab9 R14: 0000000000000001 R15: ffff8880ba12be00 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] sctp_generate_timeout_event+0x6e/0x3a0 net/sctp/sm_sideeffect.c:292 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __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:__orc_find+0xa7/0xf0 arch/x86/kernel/unwind_orc.c:56 Code: d2 75 48 48 63 03 48 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1 fe 02 4b 8d 04 76 48 8d 04 46 48 83 c4 10 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 48 83 c4 10 31 c0 5b 5d 41 5c 41 RSP: 0018:ffff88808ebcec58 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: ffffffff8b8fd640 RBX: ffffffff8b325134 RCX: ffffffff8122efe1 RDX: 0000000000000000 RSI: ffffffff8b8fd628 RDI: ffffffff8b325124 RBP: ffffffff8b325138 R08: 0000000000000000 R09: ffffffff8b8fd628 R10: ffff88808ebceed7 R11: 0000000000074071 R12: ffffffff8b325134 R13: ffffffff8b325124 R14: 0000000000000004 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:159 [inline] unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422 __unwind_start+0x5b8/0x960 arch/x86/kernel/unwind_orc.c:667 unwind_start arch/x86/include/asm/unwind.h:60 [inline] __save_stack_trace+0x72/0x190 arch/x86/kernel/stacktrace.c:43 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 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 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:92 [inline] sctp_transport_new+0x552/0x710 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: 0033:0x7f9d1e3c8a39 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:00007f9d1b93e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f9d1e4cbf60 RCX: 00007f9d1e3c8a39 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00007f9d1e422c5f R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe212ab6df R14: 00007f9d1b93e300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 5c pop %rsp 1: 24 08 and $0x8,%al 3: 48 c7 44 24 10 35 af movq $0xffffffff89b6af35,0x10(%rsp) a: b6 89 c: 48 c1 eb 03 shr $0x3,%rbx 10: 48 c7 44 24 18 20 7f movq $0xffffffff81297f20,0x18(%rsp) 17: 29 81 19: 48 8d 14 03 lea (%rbx,%rax,1),%rdx 1d: c7 02 f1 f1 f1 f1 movl $0xf1f1f1f1,(%rdx) 23: c7 42 04 00 f3 f3 f3 movl $0xf3f3f300,0x4(%rdx) * 2a: 48 89 fa mov %rdi,%rdx <-- trapping instruction 2d: 65 48 8b 0c 25 28 00 mov %gs:0x28,%rcx 34: 00 00 36: 48 89 4c 24 60 mov %rcx,0x60(%rsp) 3b: 31 c9 xor %ecx,%ecx 3d: 48 rex.W 3e: c1 .byte 0xc1 3f: ea (bad)