syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [syz.0.1252:7087]
Modules linked in:
CPU: 0 PID: 7087 Comm: syz.0.1252 Not tainted 5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:queued_write_lock_slowpath+0x14b/0x440 kernel/locking/qrwlock.c:78
Code: 4c 89 ff be 04 00 00 00 e8 b2 7d 5d 00 f0 41 81 0f 00 01 00 00 48 8b 5c 24 08 43 0f b6 04 2e 84 c0 0f 85 94 00 00 00 41 8b 07 <3d> 00 01 00 00 74 27 f3 90 43 0f b6 04 2e 84 c0 74 eb 44 89 f9 80
RSP: 0018:ffffc90000007460 EFLAGS: 00000246
RAX: 00000000000001ff RBX: 1ffff92000000e96 RCX: ffffffff8155349e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff87196fc8
RBP: ffffc90000007510 R08: dffffc0000000000 R09: fffffbfff0e32dfa
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000074b0
R13: dffffc0000000000 R14: 1ffffffff0e32df9 R15: ffffffff87196fc8
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd6fdbac38 CR3: 0000000006a0f000 CR4: 00000000003506b0
DR0: 0100000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0x10a/0x170 kernel/locking/spinlock.c:324
 ___neigh_create+0xd0d/0x1bd0 net/core/neighbour.c:625
 __neigh_create+0x32/0x40 net/core/neighbour.c:679
 ip6_finish_output2+0x9ee/0x16f0 net/ipv6/ip6_output.c:127
 __ip6_finish_output+0x60f/0x7c0 net/ipv6/ip6_output.c:201
 ip6_finish_output+0x31/0x210 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x73e/0xc90 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1457
 expire_timers kernel/time/timer.c:1502 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1773
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1786
 handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
 __do_softirq kernel/softirq.c:603 [inline]
 invoke_softirq kernel/softirq.c:425 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:finish_task_switch+0x16f/0x7b0 kernel/sched/core.c:5024
Code: 74 08 4c 89 ff e8 c1 73 65 00 49 8b 1f 48 85 db 4c 8b 6d c0 0f 85 ce 00 00 00 4c 89 e7 e8 09 e4 99 03 fb 49 8d 9d 38 0b 00 00 <48> 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30
RSP: 0018:ffffc90000b07040 EFLAGS: 00000282
RAX: 0000000080000001 RBX: ffff88813db732b8 RCX: 0000000000000002
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000b07090 R08: ffffffff8191f8f9 R09: fffffbfff0e53433
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f70378c0
R13: ffff88813db72780 R14: 1ffff1103ee07081 R15: ffff8881f7038408
 context_switch kernel/sched/core.c:5155 [inline]
 __schedule+0xcd4/0x1590 kernel/sched/core.c:6512
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:6916
 irqentry_exit_cond_resched+0x2a/0x30 kernel/entry/common.c:398
 irqentry_exit+0x30/0x40 kernel/entry/common.c:432
 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:_compound_head include/linux/page-flags.h:203 [inline]
RIP: 0010:release_pages+0x21a/0x1370 mm/swap.c:953
Code: 71 d4 ff 45 31 f6 eb 09 89 5c 24 04 e8 6f 71 d4 ff 49 8d 5f 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 48 89 df e8 3c ca 16 00 4c 8b 2b 4c 89 ee 48 83 e6 01 31 ff
RSP: 0018:ffffc90000b07320 EFLAGS: 00000246
RAX: 1ffffd4000955af9 RBX: ffffea0004aad7c8 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b07430 R08: ffffffff819be69c R09: fffff940009492ff
R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000001e5
R13: ffffea0004a497c0 R14: 0000000000000000 R15: ffffea0004aad7c0
 free_pages_and_swap_cache+0x8a/0xa0 mm/swap_state.c:320
 tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
 tlb_flush_mmu+0xd0/0x180 mm/mmu_gather.c:247
 zap_pte_range mm/memory.c:1513 [inline]
 zap_pmd_range mm/memory.c:1562 [inline]
 zap_pud_range mm/memory.c:1591 [inline]
 zap_p4d_range mm/memory.c:1612 [inline]
 unmap_page_range+0x1c70/0x1ed0 mm/memory.c:1633
 unmap_single_vma mm/memory.c:1678 [inline]
 unmap_vmas+0x389/0x560 mm/memory.c:1710
 exit_mmap+0x3e4/0x940 mm/mmap.c:3215
 __mmput+0x95/0x310 kernel/fork.c:1179
 mmput+0x5b/0x170 kernel/fork.c:1202
 exit_mm kernel/exit.c:554 [inline]
 do_exit+0xb9c/0x2ca0 kernel/exit.c:867
 do_group_exit+0x141/0x310 kernel/exit.c:1002
 get_signal+0x7a3/0x1630 kernel/signal.c:2904
 arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:320
 irqentry_exit+0x12/0x40 kernel/entry/common.c:411
 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0033:0x7f607cbe5819
Code: Unable to access opcode bytes at RIP 0x7f607cbe57ef.
RSP: 002b:00007f607b25e038 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f607cd9cfa0 RCX: 00007f607cbe5819
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000005
RBP: 00007f607cc5875e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f607cd9cfa0 R15: 00007ffc039f0098
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7622 Comm: syz.0.1302 Not tainted 5.15.167-syzkaller-00348-g2e66050fb753 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:idle_cpu+0xd6/0x120 kernel/sched/core.c:7242
Code: 75 20 49 83 c4 48 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 75 31 45 31 f6 41 83 3c 24 00 41 0f 94 c6 44 89 f0 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 44 89 f9 80 e1 07 80 c1 03 38 c1 7c bf 4c 89 ff
RSP: 0018:ffffc900001d0230 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff8881451713c0 RCX: 0000000000010501
RDX: 1ffffffff0e9a208 RSI: ffffffff85a34040 RDI: ffff8881f7138360
RBP: ffffc900001d0240 R08: ffffffff874d1040 R09: ffffffff874d1048
R10: ffffffff874d1058 R11: ffffffff874d1050 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881451713c0
FS:  00007f85e82a36c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f019ff8 CR3: 000000010e898000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 tick_irq_exit kernel/softirq.c:635 [inline]
 __irq_exit_rcu+0x5e/0xf0 kernel/softirq.c:654
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
 sysvec_apic_timer_interrupt+0x49/0xc0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x5ba/0xc40 kernel/locking/qspinlock.c:508
Code: 00 00 49 89 dc c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 48 01 00 00 48 8b 44 24 08 c6 00 01 bb 00 80 ff ff eb 06 f3 90 <ff> c3 74 5e 41 0f b6 44 15 00 84 c0 75 36 41 80 3f 00 75 ea 4c 89
RSP: 0018:ffffc900001d0340 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 00000000ffff89b4 RCX: ffffffff8155289f
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff87196fcc
RBP: ffffc900001d0430 R08: dffffc0000000000 R09: fffffbfff0e32dfa
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7138ad4
R13: 1ffffffff0e32df9 R14: 1ffff1103ee20001 R15: ffffffff87196fcc
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 queued_write_lock_slowpath+0x335/0x440 kernel/locking/qrwlock.c:66
 queued_write_lock include/asm-generic/qrwlock.h:97 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0x10a/0x170 kernel/locking/spinlock.c:324
 ___neigh_create+0xd0d/0x1bd0 net/core/neighbour.c:625
 __neigh_create+0x32/0x40 net/core/neighbour.c:679
 ip6_finish_output2+0x9ee/0x16f0 net/ipv6/ip6_output.c:127
 __ip6_finish_output+0x60f/0x7c0 net/ipv6/ip6_output.c:201
 ip6_finish_output+0x31/0x210 net/ipv6/ip6_output.c:211
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:234
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ndisc_send_skb+0x73e/0xc90 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3979
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1457
 expire_timers kernel/time/timer.c:1502 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1773
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1786
 handle_softirqs+0x25e/0x5c0 kernel/softirq.c:565
 __do_softirq kernel/softirq.c:603 [inline]
 invoke_softirq kernel/softirq.c:425 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:652
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:664
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:do_vfs_ioctl+0x223a/0x2a80 fs/ioctl.c:858
Code: fc ff df 80 3c 08 00 74 08 4c 89 ff e8 9f b0 f2 ff 48 8b 4c 24 70 48 8b 7c 24 18 be 11 00 00 00 4c 89 f2 e8 08 82 f9 ff 89 c3 <48> c7 44 24 40 0e 36 e0 45 41 c7 45 00 00 00 00 00 41 c7 45 0a 00
RSP: 0018:ffffc9000126fa60 EFLAGS: 00000283
RAX: ffffffff81bff01e RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000d928000 RSI: 000000000000001f RDI: 0000000000000020
RBP: ffffc9000126fe98 R08: ffffffff81bff010 R09: ffffed102124ca3b
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000008
R13: fffff5200024df54 R14: 0000000000000000 R15: ffff8881251fa928
 __do_sys_ioctl fs/ioctl.c:872 [inline]
 __se_sys_ioctl+0x99/0x190 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x98/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f85e9c2a819
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f85e82a3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f85e9de1fa0 RCX: 00007f85e9c2a819
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000008
RBP: 00007f85e9c9d75e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f85e9de1fa0 R15: 00007fffad1998a8
 </TASK>