watchdog: BUG: soft lockup - CPU#1 stuck for 122s! [syz.1.1191:5947] Modules linked in: CPU: 1 PID: 5947 Comm: syz.1.1191 Tainted: G W 5.10.226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:hash_stack lib/stackdepot.c:181 [inline] RIP: 0010:__stack_depot_save+0x151/0x4d0 lib/stackdepot.c:297 Code: 83 f8 01 75 11 eb 23 49 89 f9 45 89 e3 45 89 e2 41 83 f8 01 74 14 41 83 f8 02 74 0a 41 83 f8 03 75 60 45 03 61 08 45 03 51 04 <48> 89 fb 45 03 19 45 31 d4 44 89 d6 c1 c6 0e 41 29 f4 45 31 e3 44 RSP: 0018:ffffc90000170168 EFLAGS: 00000246 RAX: 000000009d44c639 RBX: 0000000076dba916 RCX: 0000000000000001 RDX: 0000000000000a20 RSI: 00000000701aa35b RDI: ffffc900001701d0 RBP: ffffc900001701c0 R08: 0000000000000001 R09: ffffc9000017026c R10: 00000000cb4e5a3c R11: 00000000fcb52409 R12: 000000009989c067 R13: 0000000000000014 R14: 0000000000000a00 R15: ffffffff84e005bb FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000660f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: kasan_save_stack mm/kasan/common.c:39 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] __kasan_slab_alloc+0xc3/0xe0 mm/kasan/common.c:463 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960 kmem_cache_alloc_node include/linux/slab.h:423 [inline] __alloc_skb+0x80/0x510 net/core/skbuff.c:200 alloc_skb include/linux/skbuff.h:1126 [inline] nlmsg_new include/net/netlink.h:953 [inline] __neigh_notify+0x7d/0x120 net/core/neighbour.c:3375 neigh_cleanup_and_release+0x2c/0x1b0 net/core/neighbour.c:102 neigh_del net/core/neighbour.c:198 [inline] neigh_remove_one+0x36b/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 __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:preempt_schedule_irq+0xc2/0x140 kernel/sched/core.c:5065 Code: 4c 89 e7 e8 b0 d6 f6 fc f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 4d bf 01 00 00 00 e8 14 a2 97 fc fb bf 01 00 00 00 89 e6 ff ff fa bf 01 00 00 00 e8 9e a3 97 fc 65 48 8b 1d 26 fd RSP: 0018:ffffc90000e7f260 EFLAGS: 00000246 RAX: 1ffff11023547146 RBX: 1ffff920001cfe50 RCX: ffffffff84b29800 RDX: 1ffff11023547004 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc90000e7f2f0 R08: ffffffff87084048 R09: ffffffff87084058 R10: ffffffff87084050 R11: ffffffff87084043 R12: ffffc90000e7f280 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920001cfe4c 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:__kernel_text_address+0x1/0x110 kernel/extable.c:104 Code: 00 00 60 86 48 39 c7 0f 93 c0 48 c7 c1 40 c3 e4 86 48 39 cf 0f 92 c1 20 c1 0f b6 c1 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 55 <48> 89 e5 41 57 41 56 53 48 89 fb 48 c7 c0 00 00 00 81 41 be 01 00 RSP: 0018:ffffc90000e7f3e8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90000e7f468 RCX: 0000000000e7f401 RDX: 1ffff920001cfe86 RSI: ffffc90000e7f9a8 RDI: ffffffff81b11c25 RBP: ffffc90000e7f410 R08: ffffc90000e7f508 R09: 0000000000000006 R10: ffffc90000e7f510 R11: dffffc0000000001 R12: ffff88811aa38000 R13: ffffffff8159b790 R14: dffffc0000000000 R15: 1ffff920001cfe8d arch_stack_walk+0xf3/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:121 save_stack+0x97/0x240 mm/page_owner.c:146 __reset_page_owner+0x36/0x150 mm/page_owner.c:174 reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] free_pcp_prepare mm/page_alloc.c:1421 [inline] free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336 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: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: 0033:0x7fc0142ad719 Code: Unable to access opcode bytes at RIP 0x7fc0142ad6ef. RSP: 002b:00007fc012f05038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fc014465058 RCX: 00007fc0142ad719 RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000004 RBP: 00007fc01432032e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fc014465058 R15: 00007ffde1a6a698 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6582 Comm: syz.1.1277 Tainted: G W 5.10.226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:_raw_spin_lock_irq+0x0/0x1b0 kernel/locking/spinlock.c:166 Code: ff 48 8d 4c 24 40 80 e1 07 80 c1 03 38 c1 0f 8c 6e ff ff ff 48 8d 7c 24 40 e8 8c c0 f5 fc e9 5f ff ff ff e8 a2 8a fa ff 0f 0b <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 83 ec 60 49 RSP: 0018:ffffc90000007118 EFLAGS: 00000046 RAX: ffffffff815b2374 RBX: ffffffff818cc890 RCX: ffff888124ffbb40 RDX: 0000000000010502 RSI: 0000000000002710 RDI: ffff8881f7049940 RBP: ffffc90000007258 R08: ffffffff815aece6 R09: ffffc90000006ce0 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023881132 R13: ffff88811c408958 R14: ffff8881f7049940 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a3a5755a88 CR3: 000000000660f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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:queued_write_lock_slowpath+0x180/0x390 kernel/locking/qrwlock.c:79 Code: 00 00 00 42 0f 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 c4 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 RSP: 0018:ffffc90000007480 EFLAGS: 00000206 RAX: 00000000000001ff RBX: 1ffffffff0da83fd RCX: ffffffff8150fdbb RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff86d41fe8 RBP: ffffc90000007530 R08: dffffc0000000000 R09: fffffbfff0da83fe R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000000e9a R13: 00000000000000ff R14: dffffc0000000000 R15: ffffffff86d41fe8 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 __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:mm_counter include/linux/mm.h:2096 [inline] RIP: 0010:zap_pte_range mm/memory.c:1314 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1435 [inline] RIP: 0010:zap_pud_range mm/memory.c:1464 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1485 [inline] RIP: 0010:unmap_page_range+0x1058/0x23b0 mm/memory.c:1506 Code: 85 60 07 00 00 e8 88 37 cd ff 4c 89 eb 48 83 c3 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 4b d1 0a 00 48 8b 1b <48> 89 de 48 83 e6 01 31 ff e8 9a 3b cd ff 48 83 e3 01 0f 85 88 00 RSP: 0018:ffffc900014174e0 EFLAGS: 00000246 RAX: 1ffffd40009850d3 RBX: 0000000000000000 RCX: ffff888124ffbb40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001417710 R08: ffffffff819d755a R09: ffffed10249ff769 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffea0004c28680 R14: 1ffffd40009850d1 R15: ffffea0004c28688 unmap_single_vma mm/memory.c:1551 [inline] unmap_vmas+0x37f/0x4f0 mm/memory.c:1583 exit_mmap+0x2f2/0x5c0 mm/mmap.c:3355 __mmput+0x95/0x2d0 kernel/fork.c:1153 mmput+0x59/0x170 kernel/fork.c:1176 exit_mm kernel/exit.c:539 [inline] do_exit+0xbda/0x2a50 kernel/exit.c:850 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: 0033:0x7fcd125c8719 Code: Unable to access opcode bytes at RIP 0x7fcd125c86ef. RSP: 002b:00007fcd11241038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff2 RBX: 00007fcd1277ff80 RCX: 00007fcd125c8719 RDX: 0000000000000023 RSI: 0000000020000300 RDI: 0000000000000005 RBP: 00007fcd1263b32e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fcd1277ff80 R15: 00007ffc814c9658