watchdog: BUG: soft lockup - CPU#1 stuck for 122s! [syz.2.641:3833]
Modules linked in:
CPU: 1 PID: 3833 Comm: syz.2.641 Tainted: G        W         5.10.226-syzkaller-00001-g6a01908517df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__list_del_entry_valid+0xa9/0x120 lib/list_debug.c:62
Code: e8 9c 9a 51 ff 49 8b 17 4c 39 f2 75 71 48 83 c3 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 7a 9a 51 ff 48 8b 13 <4c> 39 f2 75 60 b0 01 5b 41 5c 41 5e 41 5f 5d c3 48 c7 c7 60 28 60
RSP: 0018:ffffc90000170570 EFLAGS: 00000246
RAX: 1ffff11023b2cdaa RBX: ffff88811d966d50 RCX: ffffffff83c8b587
RDX: ffff88812145d548 RSI: 0000000000000001 RDI: ffff88812145d550
RBP: ffffc90000170590 R08: ffffffff83c8b5aa R09: ffffed102428ba87
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888110e4dc00 R14: ffff88812145d548 R15: ffffffff86d42618
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f311f101750 CR3: 000000011cd27000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __list_del_entry include/linux/list.h:132 [inline]
 list_del_init include/linux/list.h:204 [inline]
 neigh_mark_dead net/core/neighbour.c:123 [inline]
 neigh_del net/core/neighbour.c:193 [inline]
 neigh_remove_one+0x205/0x3d0 net/core/neighbour.c:219
 neigh_forced_gc net/core/neighbour.c:252 [inline]
 neigh_alloc net/core/neighbour.c:430 [inline]
 ___neigh_create+0x484/0x1a10 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: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:ffffc900011d7680 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 00000000ffffe571 RCX: ffffffff8150b854
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffc900011d7600
RBP: ffffc900011d7770 R08: dffffc0000000000 R09: fffffbfff0cc1ab9
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8660d5c4
R13: 1ffffffff0cc1ab8 R14: dffffc0000000000 R15: ffff88823ff52840
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:183 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0x139/0x1b0 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 write_seqlock include/linux/seqlock.h:885 [inline]
 lock_mount_hash fs/mount.h:130 [inline]
 mntput_no_expire+0x13f/0x6a0 fs/namespace.c:1159
 mntput+0x5d/0xc0 fs/namespace.c:1214
 __fput+0x55e/0x7b0 fs/file_table.c:297
 ____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:2790
 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]
 syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3199b72719
Code: Unable to access opcode bytes at RIP 0x7f3199b726ef.
RSP: 002b:00007f31987eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: fffffffffffffff5 RBX: 00007f3199d29f80 RCX: 00007f3199b72719
RDX: 0000000000000048 RSI: 00000000200054c0 RDI: 0000000000000005
RBP: 00007f3199be575e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3199d29f80 R15: 00007ffe5f79e998
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3388 Comm: syz.1.574 Tainted: G        W         5.10.226-syzkaller-00001-g6a01908517df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:kvm_sched_clock_read+0x0/0x40 arch/x86/kernel/kvmclock.c:91
Code: 89 da 48 c7 c1 60 eb 06 85 e8 32 21 7b 03 eb bc 89 cf 48 89 de 31 d2 e8 8e 23 3e 01 eb d3 66 2e 0f 1f 84 00 00 00 00 00 66 90 <55> 48 89 e5 65 ff 05 41 b9 d0 7e 65 48 8b 3d 3d bc d0 7e e8 68 06
RSP: 0018:ffffc900000072d8 EFLAGS: 00000082
RAX: 1ffffffff0cd8ef4 RBX: ffffffff85dc56b0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff85602520 RDI: 0000000000000000
RBP: ffffc900000072e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8881f70272c0
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff68e54f38 CR3: 000000013975f000 CR4: 00000000003506b0
DR0: 2000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 sched_clock_cpu+0x1b/0x3b0 kernel/sched/clock.c:371
 irqtime_account_irq+0x70/0x1d0 kernel/sched/cputime.c:63
 account_irq_enter_time include/linux/vtime.h:109 [inline]
 irq_enter_rcu+0x76/0xa0 kernel/softirq.c:377
 sysvec_irq_work+0x19/0xd0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:661
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 e4 49 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 c2
RSP: 0018:ffffc90000007480 EFLAGS: 00000206
RAX: 0000000000000000 RBX: 1ffffffff0da84c5 RCX: ffffffff8150fdbb
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff86d42628
RBP: ffffc90000007530 R08: dffffc0000000000 R09: fffffbfff0da84c6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000e9a
R13: 00000000000000ff R14: dffffc0000000000 R15: ffffffff86d42628
 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:unwind_next_frame+0x6/0x700 arch/x86/kernel/unwind_frame.c:255
Code: 41 5f 5d c3 44 89 f1 80 e1 07 80 c1 03 38 c1 7c 99 4c 89 f7 e8 3b 32 76 00 eb 8f 66 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 <41> 56 41 55 41 54 53 48 83 ec 50 49 89 fe 48 ba 00 00 00 00 00 fc
RSP: 0018:ffffc90000bd7348 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffc90000bd7360 RCX: 0000000000bd7301
RDX: dffffc0000000000 RSI: ffffffff81a7edb0 RDI: ffffc90000bd7360
RBP: ffffc90000bd7350 R08: ffffc90000bd7448 R09: 0000000000000004
R10: ffffc90000bd7450 R11: dffffc0000000001 R12: ffff88811b9e0000
R13: ffffffff8159b790 R14: ffffc90000bd7440 R15: 0000000000000000
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc3/0x270 mm/slub.c:4191
 __put_mountpoint+0x1c7/0x220 fs/namespace.c:780
 put_mountpoint fs/namespace.c:787 [inline]
 umount_mnt fs/namespace.c:838 [inline]
 umount_tree+0xd5b/0xef0 fs/namespace.c:1525
 drop_collected_mounts fs/namespace.c:1921 [inline]
 put_mnt_ns+0x98/0x1e0 fs/namespace.c:3888
 free_nsproxy+0x4c/0x240 kernel/nsproxy.c:196
 switch_task_namespaces kernel/nsproxy.c:254 [inline]
 exit_task_namespaces+0xb4/0xd0 kernel/nsproxy.c:259
 do_exit+0xc7e/0x2a50 kernel/exit.c:862
 do_group_exit+0x141/0x310 kernel/exit.c:985
 get_signal+0x10a0/0x1410 kernel/signal.c:2790
 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]
 syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274
 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f39d28b4719
Code: Unable to access opcode bytes at RIP 0x7f39d28b46ef.
RSP: 002b:00007f39d152d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffea RBX: 00007f39d2a6bf80 RCX: 00007f39d28b4719
RDX: 0000000000000080 RSI: 0000000020000280 RDI: 0000000000000005
RBP: 00007f39d292775e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f39d2a6bf80 R15: 00007ffe1e975758