IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:9474] Modules linked in: irq event stamp: 4640311 hardirqs last enabled at (4640310): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4640311): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (760): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (2989): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (2989): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9474 Comm: syz-executor.4 Not tainted 4.14.273-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809eb622c0 task.stack: ffff88808d8d8000 RIP: 0010:skb_network_header include/linux/skbuff.h:2369 [inline] RIP: 0010:ipv6_hdr include/linux/ipv6.h:93 [inline] RIP: 0010:ip6_packet_match net/ipv6/netfilter/ip6_tables.c:59 [inline] RIP: 0010:ip6t_do_table+0x342/0x1720 net/ipv6/netfilter/ip6_tables.c:315 RSP: 0018:ffff8880ba407910 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: ffff8880a244a744 RBX: ffff8880b401ebc0 RCX: ffff88809bd58480 RDX: 0000000000000000 RSI: ffff8880a244a744 RDI: ffff88809bd584b8 RBP: ffff88809bd58590 R08: 0000000000000000 R09: 0000000000022012 R10: 00000000000000d0 R11: ffff88809eb622c0 R12: ffff8880a244a680 R13: ffff8880ba407b80 R14: dffffc0000000000 R15: ffff88809bd58590 FS: 00007f240da8f700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562fb0453188 CR3: 00000000af17a000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_hook_entry_hookfn include/linux/netfilter.h:108 [inline] nf_hook_slow+0xb0/0x1a0 net/netfilter/core.c:468 nf_hook include/linux/netfilter.h:205 [inline] NF_HOOK include/linux/netfilter.h:248 [inline] ndisc_send_skb+0xcf9/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c: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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa3/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff88808d8df568 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff11e12f1 RBX: 0000000000000286 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000286 RBP: ffffffff8bfeb3c8 R08: 1ffff11015608057 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888088e00000 R13: 0000000000000002 R14: ffffffff8bfeb3c8 R15: ffff8880ab0402a0 __debug_check_no_obj_freed lib/debugobjects.c:760 [inline] debug_check_no_obj_freed+0x2c0/0x680 lib/debugobjects.c:776 free_pages_prepare mm/page_alloc.c:1064 [inline] __free_pages_ok+0x215/0xeb0 mm/page_alloc.c:1262 release_pages+0x779/0xbf0 mm/swap.c:788 tlb_flush_mmu_free+0xc1/0x1a0 mm/memory.c:272 zap_pte_range mm/memory.c:1431 [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+0x1533/0x1ce0 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: 0033:0x7f240e31a049 RSP: 002b:00007f240da8f218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f240e42cf68 RCX: 00007f240e31a049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f240e42cf68 RBP: 00007f240e42cf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f240e42cf6c R13: 00007ffdad54a7bf R14: 00007f240da8f300 R15: 0000000000022000 Code: 00 00 48 81 c6 c4 00 00 00 4c 89 fd 48 89 84 24 a0 00 00 00 48 c1 e8 03 4c 01 f0 48 89 b4 24 98 00 00 00 48 89 44 24 10 48 89 f0 <83> e6 07 48 c1 e8 03 48 89 44 24 18 48 89 f0 83 c0 01 88 44 24 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9481 Comm: systemd-udevd Not tainted 4.14.273-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809e7cc480 task.stack: ffff88809b6b0000 RIP: 0033:0x7f63a165beae RSP: 002b:00007fff9102c030 EFLAGS: 00000286 RAX: 00000000ffffffff RBX: 0000562fb0459cd0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000562fb0459cd0 RDI: 0000562fb0459c20 RBP: 0000000000000001 R08: 0000562fb0459d30 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000562fb0459c20 R13: 0000562fb0459cf8 R14: 00007f63a1888aa4 R15: 00007f63a167728e FS: 00007f63a1caa8c0(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff91028fb8 CR3: 000000009cefd000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 81 c6 c4 00 00 00 add $0xc4,%rsi 9: 4c 89 fd mov %r15,%rbp c: 48 89 84 24 a0 00 00 mov %rax,0xa0(%rsp) 13: 00 14: 48 c1 e8 03 shr $0x3,%rax 18: 4c 01 f0 add %r14,%rax 1b: 48 89 b4 24 98 00 00 mov %rsi,0x98(%rsp) 22: 00 23: 48 89 44 24 10 mov %rax,0x10(%rsp) 28: 48 89 f0 mov %rsi,%rax * 2b: 83 e6 07 and $0x7,%esi <-- trapping instruction 2e: 48 c1 e8 03 shr $0x3,%rax 32: 48 89 44 24 18 mov %rax,0x18(%rsp) 37: 48 89 f0 mov %rsi,%rax 3a: 83 c0 01 add $0x1,%eax 3d: 88 .byte 0x88 3e: 44 rex.R 3f: 24 .byte 0x24