watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [syz-executor942:9813] Modules linked in: irq event stamp: 2207993 hardirqs last enabled at (2207992): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2207993): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2155502): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2155505): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2155505): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 9813 Comm: syz-executor942 Not tainted 4.19.209-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x759/0x1400 arch/x86/kernel/unwind_orc.c:437 Code: 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 8b 4e 38 48 ba 00 00 00 00 00 fc ff RSP: 0018:ffff8880ba107420 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: 1ffff11017420e8d RCX: ffffffff8c0658c3 RDX: 1ffff11017420eb1 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8c0658c2 R09: ffffffff8c0658be R10: ffff8880ba1075af R11: 0000000000074071 R12: ffff8880ba107598 R13: ffff8880ba107585 R14: ffff8880ba107550 R15: ffffffff8c0658be FS: 00007f630b77c700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f630b75b718 CR3: 00000000a96e1000 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 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 kmem_cache_zalloc include/linux/slab.h:699 [inline] sctp_chunkify+0x4b/0x2e0 net/sctp/sm_make_chunk.c:1349 sctp_rcv+0x136e/0x3300 net/sctp/input.c:222 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:preempt_schedule_irq+0xab/0x140 kernel/sched/core.c:3744 Code: 29 f9 e8 c8 4e 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 0b 28 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:ffff888094f6eeb0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff11015473da5 RDX: 0000000000000000 RSI: ffff8880aa39ed30 RDI: 0000000000000001 RBP: ffffed1015473c90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa39e480 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 73 87 d5 09 RSP: 0018:ffff888094f6ef80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: 0000000000000200 RCX: 1ffff11015473da5 RDX: dffffc0000000000 RSI: ffff8880aa39ed30 RDI: ffff8880aa39ed04 RBP: ffffffff87020786 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aa39e480 R13: 0000000000000010 R14: 000000000000000e R15: ffff8880a951a400 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: 0033:0x7f630b7ce759 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 15 00 00 90 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:00007f630b77c308 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f630b8574c8 RCX: 00007f630b7ce759 RDX: 000000000000006b RSI: 0000000000000084 RDI: 0000000000000005 RBP: 00007f630b8574c0 R08: 000000000000001c R09: 0000000000000000 R10: 000000002055bfe4 R11: 0000000000000246 R12: 00007f630b8574cc R13: 00007f630b82451c R14: 0100000000000000 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: e8 2c de 6e 00 callq 0x6ede31 5: 4c 8b 44 24 30 mov 0x30(%rsp),%r8 a: 48 8b 4c 24 28 mov 0x28(%rsp),%rcx f: e9 06 ff ff ff jmpq 0xffffff1a 14: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1b: fc ff df 1e: 48 8b 14 24 mov (%rsp),%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 c4 09 00 00 jne 0x9f4 <-- trapping instruction 30: 4c 89 f8 mov %r15,%rax 33: 49 8b 4e 38 mov 0x38(%r14),%rcx 37: 48 rex.W 38: ba 00 00 00 00 mov $0x0,%edx 3d: 00 fc add %bh,%ah 3f: ff .byte 0xff