watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor.0:589] Modules linked in: irq event stamp: 2249659 hardirqs last enabled at (2249658): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2249659): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2220616): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2220619): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2220619): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 589 Comm: syz-executor.0 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+0xef5/0x1400 arch/x86/kernel/unwind_orc.c:579 Code: d0 0f 93 c1 49 39 d4 0f 92 c0 84 c1 74 0b 48 3b 6c 24 18 0f 86 5f 01 00 00 bf 01 00 00 00 e8 f2 dc 17 00 65 8b 15 6b 4f d8 7e <85> d2 b8 01 00 00 00 0f 85 90 f1 ff ff e8 23 ad d6 ff e9 86 f1 ff RSP: 0018:ffff8880ba007398 EFLAGS: 00000213 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000103 RBX: 1ffff11017400e7c RCX: 0000000000000000 RDX: 0000000000000102 RSI: ffff8880ba007328 RDI: 0000000000000001 RBP: ffff888074ee7ef8 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba007527 R11: 0000000000074071 R12: ffff888074ee0000 R13: ffff8880ba0074fd R14: ffff8880ba0074c8 R15: ffffffff8bf53380 FS: 00007f0a2ff72700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cd27000 CR3: 00000000b0d45000 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 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] _sctp_make_chunk+0x50/0x260 net/sctp/sm_make_chunk.c:1411 sctp_make_control+0x30/0x2d0 net/sctp/sm_make_chunk.c:1458 sctp_make_heartbeat+0x8c/0x270 net/sctp/sm_make_chunk.c:1165 sctp_sf_heartbeat.constprop.0+0x21/0x170 net/sctp/sm_statefuns.c:1015 sctp_sf_sendbeat_8_3+0x36c/0x510 net/sctp/sm_statefuns.c:1059 sctp_do_sm+0x162/0x5110 net/sctp/sm_sideeffect.c:1167 sctp_generate_heartbeat_event+0x2af/0x490 net/sctp/sm_sideeffect.c:406 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:preempt_schedule_irq+0xab/0x140 kernel/sched/core.c:3744 Code: 29 f9 e8 58 3f 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 9b 18 d9 01 00 74 5b fb 66 0f 1f 44 00 00 bf 01 00 00 00 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80 3c 18 00 75 4b RSP: 0018:ffff888074ee6eb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff1100d3615b5 RDX: 0000000000000000 RSI: ffff888069b0adb0 RDI: 0000000000000001 RBP: ffffed100d3614a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888069b0a500 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 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:ffff888074ee6f80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: 0000000000000200 RCX: 1ffff1100d3615b5 RDX: dffffc0000000000 RSI: ffff888069b0adb0 RDI: ffff888069b0ad84 RBP: ffffffff870217f6 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888069b0a500 R13: 0000000000000010 R14: 000000000000000e R15: ffff88809ac03700 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: 0033:0x7f0a329fca39 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:00007f0a2ff72188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f0a32afff60 RCX: 00007f0a329fca39 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00007f0a32a56e8f R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2c3feebf R14: 00007f0a2ff72300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 ---------------- Code disassembly (best guess): 0: d0 0f rorb (%rdi) 2: 93 xchg %eax,%ebx 3: c1 49 39 d4 rorl $0xd4,0x39(%rcx) 7: 0f 92 c0 setb %al a: 84 c1 test %al,%cl c: 74 0b je 0x19 e: 48 3b 6c 24 18 cmp 0x18(%rsp),%rbp 13: 0f 86 5f 01 00 00 jbe 0x178 19: bf 01 00 00 00 mov $0x1,%edi 1e: e8 f2 dc 17 00 callq 0x17dd15 23: 65 8b 15 6b 4f d8 7e mov %gs:0x7ed84f6b(%rip),%edx # 0x7ed84f95 * 2a: 85 d2 test %edx,%edx <-- trapping instruction 2c: b8 01 00 00 00 mov $0x1,%eax 31: 0f 85 90 f1 ff ff jne 0xfffff1c7 37: e8 23 ad d6 ff callq 0xffd6ad5f 3c: e9 .byte 0xe9 3d: 86 f1 xchg %dh,%cl 3f: ff .byte 0xff