audit: type=1800 audit(1646052676.077:4): pid=9761 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="bus" dev="sda1" ino=13936 res=0 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.2:9717] Modules linked in: irq event stamp: 4001095 hardirqs last enabled at (4001094): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (4001095): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (85678): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (87829): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (87829): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9717 Comm: syz-executor.2 Not tainted 4.14.268-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809b16a180 task.stack: ffff888092b28000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:780 [inline] RIP: 0010:mod_delayed_work_on+0x15a/0x190 kernel/workqueue.c:1603 RSP: 0018:ffff8880ba4076b0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: ffff88809b16a180 RBX: 0000000000000001 RCX: 1ffff1101362d554 RDX: 0000000000000100 RSI: ffff88809b16aaa8 RDI: 0000000000000206 RBP: 1ffff11017480ed6 R08: ffffffff8b9cd520 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000206 R13: 0000000000000008 R14: ffff88823a07a080 R15: 0000000000000000 FS: 00007fab57241700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c89c04f8c8 CR3: 000000009aebc000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mod_delayed_work include/linux/workqueue.h:521 [inline] set_timeout drivers/infiniband/core/addr.c:321 [inline] netevent_callback drivers/infiniband/core/addr.c:867 [inline] netevent_callback+0xb3/0xe0 drivers/infiniband/core/addr.c:860 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 __atomic_notifier_call_chain+0x7c/0x140 kernel/notifier.c:183 neigh_cleanup_and_release+0x7e/0xc0 net/core/neighbour.c:107 neigh_del+0x161/0x1f0 net/core/neighbour.c:141 neigh_forced_gc net/core/neighbour.c:190 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xc5d/0x19b0 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: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:page_zonenum include/linux/mm.h:797 [inline] RIP: 0010:is_zone_device_page include/linux/mm.h:803 [inline] RIP: 0010:is_device_public_page include/linux/memremap.h:171 [inline] RIP: 0010:release_pages+0x101/0xbf0 mm/swap.c:769 RSP: 0018:ffff888092b2f6c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: 00fff00000000000 RBX: 00000000000001f8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000000001f8 RDI: ffff8880a9c5a010 RBP: ffffea000289a4c0 R08: 1ffff11016c2e434 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea000289a49c R14: ffff8880a9c5a168 R15: dffffc0000000000 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: 0033:0x7fab588cc049 RSP: 002b:00007fab57241168 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: fffffffffffffe00 RBX: 00007fab589def60 RCX: 00007fab588cc049 RDX: 0000000000010000 RSI: 0000000020000440 RDI: 0000000000000003 RBP: 00007fab5892608d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff446ff3ff R14: 00007fab57241300 R15: 0000000000022000 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 3a 48 83 3d 9f 79 ba 07 00 74 18 e8 f0 27 1f 00 4c 89 e7 57 9d 0f 1f 44 00 00 8f e8 df 27 1f 00 0f 0b e8 d8 27 1f 00 0f 0b 48 c7 c7 c8 93 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9810 Comm: syz-executor.1 Not tainted 4.14.268-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a84bc0c0 task.stack: ffff8880933b8000 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:4038 RSP: 0018:ffff8880ba507690 EFLAGS: 00000086 RAX: 1ffffffff11e1279 RBX: 0000000000000086 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000086 RBP: ffff8880a84bc0c0 R08: ffff88823fff7058 R09: ffff88823fff704f R10: ffff88823fff7057 R11: 0000002d38d2deb4 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f19e4167700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f19e40c2718 CR3: 000000009fea3000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held include/linux/lockdep.h:437 [inline] rcu_read_lock_sched_held+0x16c/0x1d0 kernel/rcu/update.c:116 trace_local_timer_entry arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x430/0x5e0 arch/x86/kernel/apic/apic.c:1103 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline] RIP: 0010:queued_write_lock_slowpath+0x80/0x1d0 kernel/locking/qrwlock.c:130 RSP: 0018:ffff8880ba5077b8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 00000000000000ff RBX: ffffffff89d95630 RCX: 00000000000031e7 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffffff89d95630 RBP: ffffffff89d95634 R08: ffffffff8b9bb9f8 R09: 00000000000421a4 R10: ffff8880a84bca38 R11: ffff8880a84bc0c0 R12: fffffbfff13b2ac6 R13: 0000000000000001 R14: 0000000000000000 R15: ffff888096baf0c0 queued_write_lock include/asm-generic/qrwlock.h:134 [inline] do_raw_write_lock+0xc2/0x1d0 kernel/locking/spinlock_debug.c:203 neigh_forced_gc net/core/neighbour.c:176 [inline] neigh_alloc net/core/neighbour.c:315 [inline] __neigh_create+0xb34/0x19b0 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: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:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181 RSP: 0018:ffff8880933bfa38 EFLAGS: 00050206 ORIG_RAX: ffffffffffffff10 RAX: ffffed100a8df800 RBX: 0000000000001000 RCX: 0000000000000de0 RDX: 0000000000001000 RSI: 00000000200002a0 RDI: ffff8880546fb220 RBP: 0000000020000080 R08: 0000000000000001 R09: ffffed100a8df7ff R10: ffff8880546fbfff R11: 0000000000000000 R12: ffff8880546fb000 R13: 00007ffffffff000 R14: 0000000020001080 R15: ffff8880933bfdb8 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline] copyin+0x99/0xc0 lib/iov_iter.c:146 iov_iter_copy_from_user_atomic+0x36a/0xa20 lib/iov_iter.c:801 generic_perform_write+0x21f/0x420 mm/filemap.c:3063 __generic_file_write_iter+0x227/0x590 mm/filemap.c:3180 ext4_file_write_iter+0x276/0xd20 fs/ext4/file.c:270 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: 0033:0x7f19e57f2049 RSP: 002b:00007f19e4167168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f19e5904f60 RCX: 00007f19e57f2049 RDX: 00000000fffffe5e RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f19e584c08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc5962120f R14: 00007f19e4167300 R15: 0000000000022000 Code: 00 00 00 00 00 fc ff df c7 85 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d c5 5a af 07 00 74 2c 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 5d 41 5c c3 48 83 c4 08 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 48 c1 fisttps -0x3f(%rax) 3: e8 03 80 3c 10 callq 0x103c800b 8: 00 75 3a add %dh,0x3a(%rbp) b: 48 83 3d 9f 79 ba 07 cmpq $0x0,0x7ba799f(%rip) # 0x7ba79b2 12: 00 13: 74 18 je 0x2d 15: e8 f0 27 1f 00 callq 0x1f280a 1a: 4c 89 e7 mov %r12,%rdi 1d: 57 push %rdi 1e: 9d popfq 1f: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) * 24: eb 8f jmp 0xffffffb5 <-- trapping instruction 26: e8 df 27 1f 00 callq 0x1f280a 2b: 0f 0b ud2 2d: e8 d8 27 1f 00 callq 0x1f280a 32: 0f 0b ud2 34: 48 rex.W 35: c7 .byte 0xc7 36: c7 (bad) 37: c8 .byte 0xc8 38: 93 xchg %eax,%ebx