watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.9.1542:8634]
Modules linked in:
CPU: 1 PID: 8634 Comm: syz.9.1542 Tainted: G        W         5.10.234-syzkaller-00033-g094fc3778d6b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:csum_ipv6_magic+0x75/0x80 arch/x86/lib/csum-wrappers_64.c:96
Code: 48 c1 e9 20 89 4d d4 03 45 d4 83 d0 00 89 c1 c1 e1 10 25 00 00 ff ff 01 c8 15 ff ff 00 00 f7 d0 c1 e8 10 48 83 c4 08 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 cc cc cc 55 48 89 e5 48 89 f8 48 85 c0 74
RSP: 0018:ffffc900001709f8 EFLAGS: 00000286
RAX: 000000000000667c RBX: 0000000000000010 RCX: 000000006a2e0000
RDX: 0000000000000102 RSI: ffffffff8594a080 RDI: ffffc90000170d00
RBP: ffffc90000170a10 R08: 00000000e454ac30 R09: ffffc900001708e0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888114fe7438
R13: ffffc90000170d00 R14: 00000000e454ac30 R15: 000000000000003a
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10c25cc593 CR3: 000000011c283000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ndisc_send_skb+0x2e6/0xc00 net/ipv6/ndisc.c:500
 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:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:preempt_count_sub+0xf3/0x160 kernel/sched/core.c:4486
Code: 83 3d 78 d8 9a 05 00 75 94 48 c7 c7 40 1c 08 85 48 c7 c6 20 1d 08 85 e8 9b 0d f5 ff 0f 0b e9 7a ff ff ff 48 c7 c1 00 e9 08 87 <80> e1 07 80 c1 03 38 c1 0f 8c 2a ff ff ff 48 c7 c7 00 e9 08 87 e8
RSP: 0018:ffffc90000fcf228 EFLAGS: 00000202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff8708e900
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000fcf238 R08: ffffffff8188f9f9 R09: fffffbfff0dc7ad3
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7155fc0
R13: ffff8881130d8000 R14: dffffc0000000000 R15: 0000000000000000
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
 _raw_spin_unlock_irq+0x4e/0x70 kernel/locking/spinlock.c:199
 finish_lock_switch kernel/sched/core.c:3784 [inline]
 finish_task_switch+0x130/0x5a0 kernel/sched/core.c:3884
 context_switch kernel/sched/core.c:4049 [inline]
 __schedule+0xbee/0x1330 kernel/sched/core.c:4804
 preempt_schedule_common+0x9b/0xf0 kernel/sched/core.c:4963
 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4988
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:39
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x60/0x70 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 zap_pte_range mm/memory.c:1375 [inline]
 zap_pmd_range mm/memory.c:1435 [inline]
 zap_pud_range mm/memory.c:1464 [inline]
 zap_p4d_range mm/memory.c:1485 [inline]
 unmap_page_range+0x1c54/0x23b0 mm/memory.c:1506
 unmap_single_vma mm/memory.c:1551 [inline]
 unmap_vmas+0x37f/0x4f0 mm/memory.c:1583
 exit_mmap+0x2e6/0x560 mm/mmap.c:3373
 __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: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]
 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: 0033:0x7f0067cf8169
Code: Unable to access opcode bytes at RIP 0x7f0067cf813f.
RSP: 002b:00007f00663620e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f0067f10fa8 RCX: 00007f0067cf8169
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0067f10fac
RBP: 00007f0067f10fa0 R08: 00007fff832f90b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0067f10fac
R13: 0000000000000000 R14: 00007fff83216830 R15: 00007fff83216918
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 929 Comm: kworker/u4:5 Tainted: G        W         5.10.234-syzkaller-00033-g094fc3778d6b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:165 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:197
Code: 45 08 65 48 8b 0d 20 ae 97 7e 65 8b 15 25 ae 97 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 dc 0a 00 00 00 74 2c <8b> 91 b8 0a 00 00 83 fa 02 75 21 48 8b 91 c0 0a 00 00 48 8b 32 48
RSP: 0018:ffffc90000d67710 EFLAGS: 00000246
RAX: ffffffff815fd644 RBX: 1ffff920001aceed RCX: ffff8881175a3b40
RDX: 0000000000000003 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000d67710 R08: ffffffff815fd616 R09: ffffed103ee2aec9
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90000d67768 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc894426f40 CR3: 000000000660f000 CR4: 00000000003506b0
DR0: 0010000010000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 csd_lock_wait kernel/smp.c:229 [inline]
 smp_call_function_single+0x294/0x510 kernel/smp.c:517
 smp_call_function_many_cond+0x94e/0xa30 kernel/smp.c:653
 smp_call_function_many kernel/smp.c:716 [inline]
 smp_call_function kernel/smp.c:738 [inline]
 on_each_cpu+0xa8/0x1a0 kernel/smp.c:837
 text_poke_sync arch/x86/kernel/alternative.c:1318 [inline]
 text_poke_bp_batch+0x1d4/0x600 arch/x86/kernel/alternative.c:1509
 text_poke_flush arch/x86/kernel/alternative.c:1677 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1684
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:459
 jump_label_update+0x379/0x400 kernel/jump_label.c:825
 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177
 static_key_enable+0x1a/0x30 kernel/jump_label.c:190
 toggle_allocation_gate+0xbf/0x450 mm/kfence/core.c:624
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
NMI backtrace for cpu 1
CPU: 1 PID: 8634 Comm: syz.9.1542 Tainted: G        W    L    5.10.234-syzkaller-00033-g094fc3778d6b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__next_base kernel/time/hrtimer.c:-1 [inline]
RIP: 0010:__hrtimer_run_queues+0xce/0xa50 kernel/time/hrtimer.c:1623
Code: 00 00 8b 1b 44 89 ee 21 de 31 ff e8 8c 90 0f 00 41 21 dd 0f 84 1a 09 00 00 48 8d 84 24 c0 00 00 00 48 c1 e8 03 48 89 44 24 40 <48> c7 c0 a8 34 e1 86 48 c1 e8 03 48 89 44 24 68 48 c7 c0 60 34 e1
RSP: 0018:ffffc900001701c0 EFLAGS: 00000806
RAX: 1ffff9200002e050 RBX: 0000000000000001 RCX: ffff8881130d8000
RDX: ffff8881130d8000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900001702f8 R08: ffffffff815b3274 R09: 0000000000000003
R10: fffff5200002e04c R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff8881f7149940 R15: ffff8881f7149970
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10c25cc593 CR3: 000000011c283000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 hrtimer_interrupt+0x39a/0x8b0 kernel/time/hrtimer.c:1711
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3f0 arch/x86/kernel/apic/apic.c:1112
 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:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:arch_stack_walk+0x114/0x140 arch/x86/kernel/stacktrace.c:24
Code: ff 48 89 df e8 ed e0 05 00 48 85 c0 74 1e 4c 89 f7 48 89 c6 41 ff d5 84 c0 74 11 48 89 df e8 03 e2 05 00 83 bd 70 ff ff ff 00 <75> d5 65 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 0f 48 83 c4 68 5b
RSP: 0018:ffffc90000170520 EFLAGS: 00000202
RAX: 0000000000170501 RBX: ffffc90000170520 RCX: 0000000000170501
RDX: 1ffff9200002e0a6 RSI: ffffc90000fcf238 RDI: ffffc90000170578
RBP: ffffc900001705b0 R08: ffffc90000170608 R09: 0000000000000019
R10: ffffc90000170610 R11: dffffc0000000001 R12: ffff8881130d8000
R13: ffffffff8159c9c0 R14: ffffc90000170600 R15: 0000000000000000
 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]
 kmem_cache_free+0xa9/0x1e0 mm/slub.c:3219
 mempool_free_slab+0x1d/0x30 mm/mempool.c:520
 mempool_free+0xd7/0x310 mm/mempool.c:502
 bio_free+0x157/0x1a0 block/bio.c:266
 bio_put+0xca/0x120 block/bio.c:-1
 ext4_end_bio+0x2f0/0x570 fs/ext4/page-io.c:-1
 bio_endio+0x520/0x6a0 block/bio.c:1458
 req_bio_endio block/blk-core.c:263 [inline]
 blk_update_request+0x6e9/0x12b0 block/blk-core.c:1468
 scsi_end_request+0x90/0x810 drivers/scsi/scsi_lib.c:570
 scsi_io_completion+0x1cb/0x480 drivers/scsi/scsi_lib.c:967
 scsi_finish_command+0x3b0/0x500 drivers/scsi/scsi.c:205
 scsi_softirq_done+0x13f/0x340 drivers/scsi/scsi_lib.c:1442
 blk_done_softirq+0x345/0x3d0 block/blk-mq.c:593
 __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:1106
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635
RIP: 0010:preempt_count_sub+0xf3/0x160 kernel/sched/core.c:4486
Code: 83 3d 78 d8 9a 05 00 75 94 48 c7 c7 40 1c 08 85 48 c7 c6 20 1d 08 85 e8 9b 0d f5 ff 0f 0b e9 7a ff ff ff 48 c7 c1 00 e9 08 87 <80> e1 07 80 c1 03 38 c1 0f 8c 2a ff ff ff 48 c7 c7 00 e9 08 87 e8
RSP: 0018:ffffc90000fcf228 EFLAGS: 00000202
RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffffffff8708e900
RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90000fcf238 R08: ffffffff8188f9f9 R09: fffffbfff0dc7ad3
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7155fc0
R13: ffff8881130d8000 R14: dffffc0000000000 R15: 0000000000000000
 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
 _raw_spin_unlock_irq+0x4e/0x70 kernel/locking/spinlock.c:199
 finish_lock_switch kernel/sched/core.c:3784 [inline]
 finish_task_switch+0x130/0x5a0 kernel/sched/core.c:3884
 context_switch kernel/sched/core.c:4049 [inline]
 __schedule+0xbee/0x1330 kernel/sched/core.c:4804
 preempt_schedule_common+0x9b/0xf0 kernel/sched/core.c:4963
 preempt_schedule+0xd9/0xe0 kernel/sched/core.c:4988
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:39
 __raw_spin_unlock include/linux/spinlock_api_smp.h:152 [inline]
 _raw_spin_unlock+0x60/0x70 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:394 [inline]
 zap_pte_range mm/memory.c:1375 [inline]
 zap_pmd_range mm/memory.c:1435 [inline]
 zap_pud_range mm/memory.c:1464 [inline]
 zap_p4d_range mm/memory.c:1485 [inline]
 unmap_page_range+0x1c54/0x23b0 mm/memory.c:1506
 unmap_single_vma mm/memory.c:1551 [inline]
 unmap_vmas+0x37f/0x4f0 mm/memory.c:1583
 exit_mmap+0x2e6/0x560 mm/mmap.c:3373
 __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: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]
 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: 0033:0x7f0067cf8169
Code: Unable to access opcode bytes at RIP 0x7f0067cf813f.
RSP: 002b:00007f00663620e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f0067f10fa8 RCX: 00007f0067cf8169
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0067f10fac
RBP: 00007f0067f10fa0 R08: 00007fff832f90b0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0067f10fac
R13: 0000000000000000 R14: 00007fff83216830 R15: 00007fff83216918