watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.2:9770] Modules linked in: irq event stamp: 4045353 hardirqs last enabled at (4045352): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4045353): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (32648): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (34243): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (34243): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9770 Comm: syz-executor.2 Not tainted 4.14.267-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a2670180 task.stack: ffff88804bd28000 RIP: 0010:unwind_next_frame+0xdd2/0x17d0 arch/x86/kernel/unwind_orc.c:491 RSP: 0018:ffff8880ba407668 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: 1ffff11017480ed4 RCX: ffffffff8ae184b8 RDX: 1ffff11017480eec RSI: ffff88804bd2ff58 RDI: ffff8880ba407768 RBP: 0000000000000001 R08: ffffffff8ae184bc R09: ffffffff8ae184bd R10: 00000000001466f1 R11: 0000000000000001 R12: 00007f6de7b54f60 R13: ffff8880ba407760 R14: ffff8880ba40775e R15: ffff8880ba407728 FS: 00007f6de63b7700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffa637a5000 CR3: 00000000a1627000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __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 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc+0x111/0x3c0 mm/slab.c:3550 dst_alloc+0xed/0x6d0 net/core/dst.c:107 __ip6_dst_alloc net/ipv6/route.c:357 [inline] ip6_dst_alloc+0x39/0x2d0 net/ipv6/route.c:370 icmp6_dst_alloc+0x155/0x580 net/ipv6/route.c:1768 ndisc_send_skb+0xace/0x1390 net/ipv6/ndisc.c:463 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3769 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:__sanitizer_cov_trace_pc+0x9/0x50 kernel/kcov.c:65 RSP: 0018:ffff88804bd2f750 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a2670180 RBX: 0000000000000000 RCX: ffff88804bd2f9d0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea0002696d40 RBP: ffffea0002696d40 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8880a2670180 R12: ffffea0002696d40 R13: ffffea0002696d40 R14: 00007f6de7479000 R15: 0000000000000000 page_remove_file_rmap+0x25/0x690 mm/rmap.c:1208 page_remove_rmap+0x96/0xe0 mm/rmap.c:1293 zap_pte_range mm/memory.c:1364 [inline] zap_pmd_range mm/memory.c:1466 [inline] zap_pud_range mm/memory.c:1495 [inline] zap_p4d_range mm/memory.c:1516 [inline] unmap_page_range+0xf3f/0x1ce0 mm/memory.c:1537 unmap_single_vma+0x147/0x2b0 mm/memory.c:1582 unmap_vmas+0x9d/0x160 mm/memory.c:1612 exit_mmap+0x270/0x4d0 mm/mmap.c:3058 __mmput kernel/fork.c:931 [inline] mmput kernel/fork.c:952 [inline] mmput+0xfa/0x420 kernel/fork.c:947 exit_mm kernel/exit.c:548 [inline] do_exit+0x984/0x2850 kernel/exit.c:855 do_group_exit+0x100/0x2e0 kernel/exit.c:965 get_signal+0x38d/0x1ca0 kernel/signal.c:2412 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: 0033:0x7f6de7a42059 RSP: 002b:00007f6de63b7218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f6de7b54f68 RCX: 00007f6de7a42059 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6de7b54f68 RBP: 00007f6de7b54f60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6de7b54f6c R13: 00007ffd6485657f R14: 00007f6de63b7300 R15: 0000000000022000 Code: 02 84 c0 74 08 3c 03 0f 8e 69 07 00 00 41 39 2f 0f 85 8d 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 c1 07 00 00 49 8d 7f 08 49 8b 6f 38 48 b8 00 00 00 00 00 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff87241c6e ---------------- Code disassembly (best guess): 0: 02 84 c0 74 08 3c 03 add 0x33c0874(%rax,%rax,8),%al 7: 0f 8e 69 07 00 00 jle 0x776 d: 41 39 2f cmp %ebp,(%r15) 10: 0f 85 8d 00 00 00 jne 0xa3 16: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1d: fc ff df 20: 4c 89 ea mov %r13,%rdx 23: 48 c1 ea 03 shr $0x3,%rdx 27: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2b: 0f 85 c1 07 00 00 jne 0x7f2 <-- trapping instruction 31: 49 8d 7f 08 lea 0x8(%r15),%rdi 35: 49 8b 6f 38 mov 0x38(%r15),%rbp 39: 48 rex.W 3a: b8 00 00 00 00 mov $0x0,%eax