watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.1:6906] Modules linked in: irq event stamp: 5133621 hardirqs last enabled at (5133620): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (5133621): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2058400): [] ipt_do_table+0xccf/0x1820 net/ipv4/netfilter/ip_tables.c:358 softirqs last disabled at (2058635): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2058635): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 6906 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:unwind_next_frame+0xacb/0x1400 arch/x86/kernel/unwind_orc.c:548 Code: 41 c6 46 35 00 48 8b 4c 24 20 4c 89 c0 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 0f b6 04 10 48 89 ce 48 c1 ee 03 0f b6 14 16 <4c> 89 c6 83 e6 07 40 38 f0 40 0f 9e c6 84 c0 0f 95 c0 40 84 c6 0f RSP: 0018:ffff8880ba107788 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff11017420efa RCX: ffffffff8c06656f RDX: 0000000000000000 RSI: 1ffffffff180ccad RDI: ffff8880ba107910 RBP: 0000000000000001 R08: ffffffff8c06656e R09: ffffffff8c06656a R10: ffff8880ba107917 R11: 0000000000074071 R12: ffff88803f8574a0 R13: ffff8880ba1078ed R14: ffff8880ba1078b8 R15: ffffffff8c06656a FS: 00007f6c68552700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056495b0dedd8 CR3: 000000004504b000 CR4: 00000000003406e0 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 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node+0x133/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:316 [inline] mrp_pdu_append_vecattr_event+0x7d2/0x1050 net/802/mrp.c:415 mrp_attr_event+0x15d/0x220 net/802/mrp.c:510 mrp_mad_event net/802/mrp.c:590 [inline] mrp_join_timer+0x5a/0xc0 net/802/mrp.c:607 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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d RSP: 0018:ffff88803f856c20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: ffff88809db3a340 RCX: 1ffff11013b6757d RDX: dffffc0000000000 RSI: ffff88809db3ac18 RDI: ffff88809db3abc4 RBP: ffff8880ba12b0c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba12b0c0 R13: ffff888046c28300 R14: 0000000000000000 R15: 0000000000000001 finish_lock_switch kernel/sched/core.c:2578 [inline] finish_task_switch+0x146/0x760 kernel/sched/core.c:2678 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x88f/0x2040 kernel/sched/core.c:3517 preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3744 retint_kernel+0x1b/0x2d RIP: 0010:__raw_spin_lock_init+0x0/0x100 kernel/locking/spinlock_debug.c:18 Code: 48 8d 7b 78 4c 89 e2 5b 48 89 ee 5d 31 c9 41 5c e9 85 c9 fe ff e8 30 8b 4c 00 eb e0 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 54 49 89 d4 55 48 89 f5 be 38 00 00 00 53 48 89 fb e8 89 ef fe RSP: 0018:ffff88803f856e38 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: ffff88803f856ee8 RCX: ffffc90007532000 RDX: ffffffff8dd7d0e0 RSI: ffffffff8950f340 RDI: ffff8880b51bb308 RBP: ffff88804e2c18c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000097a8a290 R12: ffff8880b51bb300 R13: ffffffff8950b9a0 R14: ffff88803f857050 R15: ffff88804e2c2e60 __nf_conntrack_alloc+0x103/0x5e0 net/netfilter/nf_conntrack_core.c:1326 init_conntrack+0xf06/0x1280 net/netfilter/nf_conntrack_core.c:1402 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1506 [inline] nf_conntrack_in+0x931/0xe20 net/netfilter/nf_conntrack_core.c:1584 ipv4_conntrack_local+0x1b2/0x250 net/netfilter/nf_conntrack_proto.c:480 nf_hook_entry_hookfn include/linux/netfilter.h:119 [inline] nf_hook_slow+0xc5/0x1e0 net/netfilter/core.c:511 nf_hook include/linux/netfilter.h:244 [inline] __ip_local_out+0x435/0x800 net/ipv4/ip_output.c:114 ip_local_out+0x26/0x170 net/ipv4/ip_output.c:123 __ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 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_sendmsg_to_asoc+0x7bd/0x1ea0 net/sctp/socket.c:1959 sctp_sendmsg+0xe23/0x1580 net/sctp/socket.c:2149 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6c69bdd059 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c68552168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f6c69ceff60 RCX: 00007f6c69bdd059 RDX: 0000000000000001 RSI: 0000000020fa3fff RDI: 0000000000000005 RBP: 00007f6c69c3708d R08: 00000000206f7000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff58093e7f R14: 00007f6c68552300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8112 Comm: syz-fuzzer Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x420db5 Code: 0f b6 3b 49 89 cb 89 f1 41 89 fc d3 ef 49 83 fb 08 74 0a 0f ba e7 04 0f 83 c2 00 00 00 41 0f a3 cc 73 b5 4b 8d 3c 0b 48 8b 3f <48> 85 ff 74 a9 49 89 fc 4c 29 cf 48 39 d7 72 9e 48 89 5c 24 78 4c RSP: 002b:000000c00056fea8 EFLAGS: 00000247 RAX: 0000000000203004 RBX: 00007fbc193a7d18 RCX: 0000000000000001 RDX: 0000000000000040 RSI: 0000000000000001 RDI: 000000c012156960 RBP: 000000c00056ff28 R08: 00007fbc1949cfff R09: 000000c01215a300 R10: 000000c00001d698 R11: 0000000000000008 R12: 00000000000000da R13: 000000c000001080 R14: 00000000008e0cda R15: 0000000000000000 FS: 000000c00002f090 GS: 0000000000000000 ---------------- Code disassembly (best guess): 0: 41 c6 46 35 00 movb $0x0,0x35(%r14) 5: 48 8b 4c 24 20 mov 0x20(%rsp),%rcx a: 4c 89 c0 mov %r8,%rax d: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 14: fc ff df 17: 48 c1 e8 03 shr $0x3,%rax 1b: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 1f: 48 89 ce mov %rcx,%rsi 22: 48 c1 ee 03 shr $0x3,%rsi 26: 0f b6 14 16 movzbl (%rsi,%rdx,1),%edx * 2a: 4c 89 c6 mov %r8,%rsi <-- trapping instruction 2d: 83 e6 07 and $0x7,%esi 30: 40 38 f0 cmp %sil,%al 33: 40 0f 9e c6 setle %sil 37: 84 c0 test %al,%al 39: 0f 95 c0 setne %al 3c: 40 84 c6 test %al,%sil 3f: 0f .byte 0xf