watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.7.372:2956]
Modules linked in:
CPU: 1 PID: 2956 Comm: syz.7.372 Tainted: G        W         5.10.227-syzkaller-00554-g550d1177dc67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:queued_write_lock_slowpath+0x185/0x390 kernel/locking/qrwlock.c:79
Code: b6 04 33 84 c0 4c 8b 64 24 08 74 37 44 89 f9 80 e1 07 80 c1 03 38 c1 7c 2a 4c 89 ff e8 04 48 57 00 eb 20 f3 90 42 0f b6 04 33 <84> c0 74 15 44 89 f9 80 e1 07 80 c1 03 38 c1 7c 08 4c 89 ff e8 e2
RSP: 0018:ffffc90000170480 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 1ffffffff0da8725 RCX: ffffffff8151102b
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff86d43928
RBP: ffffc90000170530 R08: dffffc0000000000 R09: fffffbfff0da8726
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002e09a
R13: 00000000000000ff R14: dffffc0000000000 R15: ffffffff86d43928
FS:  00007f42273646c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000b4bf CR3: 00000001198e4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 queued_write_lock include/asm-generic/qrwlock.h:95 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0x10a/0x170 kernel/locking/spinlock.c:319
 neigh_forced_gc net/core/neighbour.c:237 [inline]
 neigh_alloc net/core/neighbour.c:430 [inline]
 ___neigh_create+0x1eb/0x1a10 net/core/neighbour.c:592
 __neigh_create+0x32/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x957/0x1850 net/ipv6/ip6_output.c:142
 __ip6_finish_output+0x5ec/0x780 net/ipv6/ip6_output.c:216
 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:249
 dst_output include/net/dst.h:437 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6e9/0xc00 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1789
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x268/0x5bb kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:__nr_to_section include/linux/mmzone.h:1513 [inline]
RIP: 0010:__pfn_to_section include/linux/mmzone.h:1593 [inline]
RIP: 0010:get_pageblock_bitmap mm/page_alloc.c:479 [inline]
RIP: 0010:__get_pfnblock_flags_mask mm/page_alloc.c:512 [inline]
RIP: 0010:get_pfnblock_migratetype mm/page_alloc.c:551 [inline]
RIP: 0010:free_unref_page_prepare+0x13e/0x2d0 mm/page_alloc.c:3339
Code: f8 78 68 05 48 85 c0 74 3c 4c 89 f1 48 c1 e9 16 48 8d 1c c8 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 f2 c5 04 00 <48> 8b 1b 48 85 db 74 13 4c 89 f0 48 c1 e8 0f 83 e0 7f 48 c1 e0 05
RSP: 0018:ffffc900017a7a20 EFLAGS: 00000246
RAX: 1ffff11047ffec00 RBX: ffff88823fff6000 RCX: 0000000000000000
RDX: 0000000000000200 RSI: 00000000000000ff RDI: ffffed1026fcf600
RBP: ffffc900017a7a50 R08: dffffc0000000000 R09: ffffed1026fcf400
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea0004df9e98 R14: 0000000000137e7a R15: ffffea0004df9e80
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5407
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 free_pages+0x7c/0x90 mm/page_alloc.c:5429
 _pgd_free arch/x86/mm/pgtable.c:420 [inline]
 pgd_free+0x17d/0x190 arch/x86/mm/pgtable.c:476
 mm_free_pgd kernel/fork.c:675 [inline]
 __mmdrop+0xb0/0x490 kernel/fork.c:726
 mmdrop include/linux/sched/mm.h:49 [inline]
 finish_task_switch+0x1e6/0x5a0 kernel/sched/core.c:3903
 context_switch kernel/sched/core.c:4049 [inline]
 __schedule+0xbee/0x1330 kernel/sched/core.c:4804
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:5065
 irqentry_exit_cond_resched kernel/entry/common.c:365 [inline]
 irqentry_exit+0x4f/0x60 kernel/entry/common.c:395
 sysvec_apic_timer_interrupt+0xcb/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:exit_to_user_mode_loop+0x41/0xd0 kernel/entry/common.c:159
Code: 89 fe eb 22 e8 90 49 52 00 e8 6b b3 f0 00 fa 65 48 8b 05 32 f1 a8 7e 48 8b 18 f7 c3 0e 30 08 00 0f 84 87 00 00 00 fb f6 c3 08 <74> 05 e8 f8 5d 58 03 f7 c3 00 10 00 00 74 08 4c 89 f7 e8 f8 6e 34
RSP: 0000:ffffc900017a7ee0 EFLAGS: 00000202
RAX: 0000000000010000 RBX: 0000000000000008 RCX: 0000000000010000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffc900017a7f58
RBP: ffffc900017a7ef0 R08: dffffc0000000000 R09: ffffed1022d4ac59
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff84c00cba
R13: 0000000000000000 R14: ffffc900017a7f58 R15: ffffc900017a7f58
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_reschedule_ipi+0x83/0x160 arch/x86/kernel/smp.c:225
 asm_sysvec_reschedule_ipi+0x12/0x20 arch/x86/include/asm/idtentry.h:640
RIP: 0033:0x7f4228bb5f20
Code: 00 00 00 ff 89 81 90 00 00 00 75 04 85 c0 74 1c 48 63 44 24 14 48 8d 14 40 48 8d 14 90 48 8d 05 e6 cf 22 00 48 83 7c d0 28 00 <74> 0e 48 8b 04 24 c7 80 90 00 00 00 16 00 00 00 48 8b 04 24 80 3d
RSP: 002b:00007f4227364080 EFLAGS: 00000246
RAX: 00007f4228de2f00 RBX: 00007f4228eb2fa0 RCX: 00007f4228eb2fa0
RDX: 000000000000f79c RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f4228d60cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4228eb2fa0 R15: 00007fff825b01a8
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1975 Comm: syz.4.264 Tainted: G        W         5.10.227-syzkaller-00554-g550d1177dc67 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:irq_work_queue+0x1/0x160 kernel/irq_work.c:68
Code: e1 07 80 c1 03 38 c1 0f 8c 30 ff ff ff e8 37 9a 30 00 e9 26 ff ff ff cc cc 55 48 89 e5 e8 27 01 f3 ff 5d c3 0f 1f 44 00 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 50 48 89 fb e8 0a 01 f3 ff 48
RSP: 0018:ffffc90000006d98 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888113b90000
RDX: 0000000000010501 RSI: 0000000000000001 RDI: ffff88812a394b30
RBP: ffffc90000006df0 R08: ffffffff818a1190 R09: ffffc90000006be0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88812a394b30 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4227343d58 CR3: 000000012051b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 perf_swevent_hrtimer+0x3fd/0x560 kernel/events/core.c:10467
 __run_hrtimer kernel/time/hrtimer.c:1585 [inline]
 __hrtimer_run_queues+0x3d7/0xa50 kernel/time/hrtimer.c:1649
 hrtimer_interrupt+0x39a/0x8b0 kernel/time/hrtimer.c:1711
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1083 [inline]
 __sysvec_apic_timer_interrupt+0xfd/0x3c0 arch/x86/kernel/apic/apic.c:1100
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline]
 sysvec_apic_timer_interrupt+0xba/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:121 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x5a5/0xc70 kernel/locking/qspinlock.c:508
Code: 00 c6 03 00 48 8b 44 24 28 42 0f b6 04 30 84 c0 0f 85 bf 01 00 00 48 8b 04 24 c6 00 01 bb 00 80 ff ff eb 06 f3 90 ff c3 74 50 <43> 0f b6 44 35 00 84 c0 75 32 41 80 3c 24 00 75 e9 4c 89 e7 be 02
RSP: 0018:ffffc90000007360 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 00000000ffff8f7b RCX: 1ffffffff0da8725
RDX: 0000000000000001 RSI: 0000000000000002 RDI: ffffffff86d4392e
RBP: ffffc90000007450 R08: dffffc0000000000 R09: fffffbfff0da8726
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff86d4392c
R13: 1ffffffff0da8725 R14: dffffc0000000000 R15: 0000000000000000
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [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+0x2e8/0x390 kernel/locking/qrwlock.c:67
 queued_write_lock include/asm-generic/qrwlock.h:95 [inline]
 __raw_write_lock_bh include/linux/rwlock_api_smp.h:204 [inline]
 _raw_write_lock_bh+0x10a/0x170 kernel/locking/spinlock.c:319
 ___neigh_create+0xccc/0x1a10 net/core/neighbour.c:626
 __neigh_create+0x32/0x40 net/core/neighbour.c:680
 ip6_finish_output2+0x957/0x1850 net/ipv6/ip6_output.c:142
 __ip6_finish_output+0x5ec/0x780 net/ipv6/ip6_output.c:216
 ip6_finish_output+0x34/0x1e0 net/ipv6/ip6_output.c:226
 NF_HOOK_COND include/linux/netfilter.h:288 [inline]
 ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:249
 dst_output include/net/dst.h:437 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ndisc_send_skb+0x6e9/0xc00 net/ipv6/ndisc.c:511
 ndisc_send_rs+0x532/0x6a0 net/ipv6/ndisc.c:705
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3964
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1450
 expire_timers kernel/time/timer.c:1495 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1789
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1802
 __do_softirq+0x268/0x5bb kernel/softirq.c:309
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:405 [inline]
 __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447
 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1094
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:25 [inline]
RIP: 0010:free_page_pinner include/linux/page_pinner.h:18 [inline]
RIP: 0010:free_pages_prepare mm/page_alloc.c:1350 [inline]
RIP: 0010:free_pcp_prepare mm/page_alloc.c:1421 [inline]
RIP: 0010:free_unref_page_prepare+0xc4/0x2d0 mm/page_alloc.c:3336
Code: 08 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 7e c6 04 00 48 b8 00 00 00 fc ff ff ff c1 49 21 07 e9 e0 01 00 00 <0f> 1f 44 00 00 0f b6 5d d4 4c 89 ff 31 f6 89 da e8 27 9b 04 00 84
RSP: 0018:ffffc90000bb7700 EFLAGS: 00000282
RAX: ffffffff81ad3ee9 RBX: 1ffffd400095e103 RCX: ffff888113b90000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881042b4614
RBP: ffffc90000bb7730 R08: dffffc0000000000 R09: ffffed10208568c1
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea0004af0818 R14: 000000000012bc20 R15: ffffea0004af0800
 free_unref_page mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5407
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2301
 __vfree mm/vmalloc.c:2349 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2380
 kcov_put kernel/kcov.c:408 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:510
 __fput+0x33d/0x7b0 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x129/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xc83/0x2a50 kernel/exit.c:863
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0x10a0/0x1410 kernel/signal.c:2793
 arch_do_signal_or_restart+0xbd/0x17c0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0x9b/0xd0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 sysvec_irq_work+0xc8/0xd0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661
RIP: 0033:0x7fa279e8eed9
Code: Unable to access opcode bytes at RIP 0x7fa279e8eeaf.
RSP: 002b:00007fa278506058 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007fa27a054fa0 RCX: 00007fa279e8eed9
RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000005
RBP: 00007fa279f02cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa27a054fa0 R15: 00007fffde616248