watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.4:9669] Modules linked in: irq event stamp: 3916739 hardirqs last enabled at (3916738): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (3916739): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (198698): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (200213): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (200213): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9669 Comm: syz-executor.4 Not tainted 4.14.280-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888058d0e380 task.stack: ffff888058838000 RIP: 0010:should_failslab+0x5d/0x130 mm/failslab.c:29 RSP: 0018:ffff8880ba4077b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff888058d0e380 RBX: ffff88813fe74ac0 RCX: 0000000000000000 RDX: 0000000000000100 RSI: 0000000001088020 RDI: ffff88813fe74ac0 RBP: 0000000001088020 R08: 0000000000000000 R09: 00000000000222ba R10: ffff888058d0eca8 R11: ffff888058d0e380 R12: 0000000000000000 R13: ffff88813fe74ac0 R14: 0000000001088020 R15: ffff8880ab4ce5c0 FS: 00007f21fd851700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff26f2bc10 CR3: 0000000095453000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: slab_pre_alloc_hook mm/slab.h:421 [inline] slab_alloc mm/slab.c:3376 [inline] __do_kmalloc mm/slab.c:3718 [inline] __kmalloc+0x6d/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:661 [inline] neigh_alloc net/core/neighbour.c:324 [inline] __neigh_create+0x1db/0x19c0 net/core/neighbour.c:499 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3773 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:arch_local_irq_disable arch/x86/include/asm/paravirt.h:784 [inline] RIP: 0010:__schedule+0x1ad/0x1de0 kernel/sched/core.c:3316 RSP: 0018:ffff88805883f2a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e1312 RBX: 0000000000000001 RCX: 1ffffffff1412b24 RDX: dffffc0000000000 RSI: ffffffff87239485 RDI: 0000000000000282 RBP: ffff88805883f358 R08: 0000000000000001 R09: 0000000000000001 R10: ffff88805883fb40 R11: 0000000000000001 R12: 0000000000034380 R13: ffff8880ba434380 R14: ffff888058838000 R15: ffff888058d0e380 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3511 ___preempt_schedule+0x16/0x18 unwind_next_frame+0xe6d/0x17d0 arch/x86/kernel/unwind_orc.c:498 __save_stack_trace+0x90/0x160 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_node_trace+0x153/0x400 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 alloc_skb_fclone include/linux/skbuff.h:1022 [inline] tipc_buf_acquire+0x28/0xf0 net/tipc/msg.c:66 tipc_msg_reverse+0x695/0x970 net/tipc/msg.c:493 tipc_sk_respond+0x1da/0x4a0 net/tipc/socket.c:234 __tipc_shutdown+0x501/0x920 net/tipc/socket.c:511 tipc_release+0x77/0xcd0 net/tipc/socket.c:560 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 get_signal+0x18a3/0x1ca0 kernel/signal.c:2223 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f21feedc0e9 RSP: 002b:00007f21fd851168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 0000000000356010 RBX: 00007f21fefeef60 RCX: 00007f21feedc0e9 RDX: 000000002000011a RSI: 0000000020000040 RDI: 0000000000000006 RBP: 00007f21fef3608d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc542cb8cf R14: 00007f21fd851300 R15: 0000000000022000 Code: 6e 0a 0f 84 bd 00 00 00 e8 e1 3b d6 ff f7 c5 00 08 00 00 0f 85 ac 00 00 00 e8 d0 3b d6 ff 80 3d c1 6c 81 07 00 0f 85 89 00 00 00 be 3b d6 ff 80 3d b0 6c 81 07 00 74 2c e8 b0 3b d6 ff 48 8d Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9689 Comm: syz-executor.1 Not tainted 4.14.280-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a3f60540 task.stack: ffff8880919c8000 RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff8880ba507f80 EFLAGS: 00000096 RAX: ffff8880a3f60540 RBX: ffff8880b56a4c70 RCX: 1ffffffff11993ad RDX: 0000000000000000 RSI: ffffffff87ccff80 RDI: ffffffff88cc9d68 RBP: ffff8880b56a4c78 R08: ffff8880b56a4c30 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8880a3f60540 R12: 0000000000000002 R13: dffffc0000000000 R14: 0000000000000003 R15: 0000000000000000 FS: 00007f35240be700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020a00000 CR3: 00000000b44f1000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irq_work_run_list+0xf0/0x160 kernel/irq_work.c:156 irq_work_run+0x4e/0xc0 kernel/irq_work.c:171 smp_irq_work_interrupt+0xa3/0x4e0 arch/x86/kernel/irq_work.c:21 irq_work_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:824 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:150 [inline] RIP: 0010:qlist_free_all+0xfc/0x140 mm/kasan/quarantine.c:166 RSP: 0018:ffff8880919cf5e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff09 RAX: 0000000000000007 RBX: ffff8880aa834640 RCX: 1ffff110147ec1bd RDX: 0000000000000000 RSI: ffff8880a3f60df0 RDI: 0000000000000282 RBP: 0000000000000000 R08: ffffea0002586100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888090a4b040 R13: ffff8880919cf618 R14: ffff8880b553ca80 R15: 0000000000000282 quarantine_reduce+0x185/0x200 mm/kasan/quarantine.c:259 kasan_kmalloc+0xa2/0x160 mm/kasan/kasan.c:536 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc_node mm/slab.c:3333 [inline] kmem_cache_alloc_node+0x133/0x410 mm/slab.c:3640 __alloc_skb+0x5c/0x510 net/core/skbuff.c:193 alloc_skb_fclone include/linux/skbuff.h:1022 [inline] tipc_buf_acquire+0x28/0xf0 net/tipc/msg.c:66 tipc_msg_build+0xcf/0xec0 net/tipc/msg.c:260 __tipc_sendstream+0x4d5/0x8c0 net/tipc/socket.c:1085 tipc_sendstream+0x4c/0x70 net/tipc/socket.c:1042 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 sock_write_iter+0x22c/0x370 net/socket.c:925 call_write_iter include/linux/fs.h:1780 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f35257490e9 RSP: 002b:00007f35240be168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f352585bf60 RCX: 00007f35257490e9 RDX: 000000002000011a RSI: 0000000020000040 RDI: 0000000000000006 RBP: 00007f35257a308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf0a01f9f R14: 00007f35240be300 R15: 0000000000022000 Code: 00 e9 9f fe ff ff 4c 89 e7 e8 34 b8 29 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 c0 7f 02 00 <48> 85 c0 74 1a 65 8b 15 9b 38 ad 7e 81 e2 00 01 1f 00 75 0b 8b ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 0f 84 bd 00 00 00 je 0xc3 6: e8 e1 3b d6 ff callq 0xffd63bec b: f7 c5 00 08 00 00 test $0x800,%ebp 11: 0f 85 ac 00 00 00 jne 0xc3 17: e8 d0 3b d6 ff callq 0xffd63bec 1c: 80 3d c1 6c 81 07 00 cmpb $0x0,0x7816cc1(%rip) # 0x7816ce4 23: 0f 85 89 00 00 00 jne 0xb2 * 29: e8 be 3b d6 ff callq 0xffd63bec <-- trapping instruction 2e: 80 3d b0 6c 81 07 00 cmpb $0x0,0x7816cb0(%rip) # 0x7816ce5 35: 74 2c je 0x63 37: e8 b0 3b d6 ff callq 0xffd63bec 3c: 48 rex.W 3d: 8d .byte 0x8d