watchdog: BUG: soft lockup - CPU#0 stuck for 114s! [syz.4.4485:18508]
Modules linked in:
CPU: 0 PID: 18508 Comm: syz.4.4485 Tainted: G        W          6.1.93-syzkaller-00070-g7c5c6b6397bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:should_failslab+0x1/0x20 mm/slab_common.c:1457
Code: c6 48 85 c0 75 0b 48 89 df e8 bb f4 ff ff 49 89 c6 48 89 df 4c 89 f6 e8 7d 86 0f 00 eb 03 45 31 f6 4c 89 f0 5b 41 5e 5d c3 55 <48> 89 e5 e8 77 2a 10 00 31 c9 84 c0 b8 f4 ff ff ff 0f 44 c1 5d c3
RSP: 0018:ffffc90000007b08 EFLAGS: 00000202
RAX: 3e2d7cf942d3a600 RBX: 0000000000000a20 RCX: ffff8881129ca880
RDX: 00000000ffffffff RSI: 0000000000000a20 RDI: ffff888100ba9b00
RBP: ffffc90000007b68 R08: ffffffff84030cc9 R09: ffffed1023750505
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888100ba9b00
R13: ffffffff84030d0c R14: 00000000ffffffff R15: 0000000000000100
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fee1e852dc0 CR3: 0000000006e0f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __alloc_skb+0xcc/0x2d0 net/core/skbuff.c:505
 alloc_skb include/linux/skbuff.h:1290 [inline]
 ndisc_alloc_skb+0xf3/0x2d0 net/ipv6/ndisc.c:422
 ndisc_send_rs+0x264/0x5f0 net/ipv6/ndisc.c:703
 addrconf_rs_timer+0x2d1/0x600 net/ipv6/addrconf.c:3984
 call_timer_fn+0x3b/0x2d0 kernel/time/timer.c:1510
 expire_timers kernel/time/timer.c:1555 [inline]
 __run_timers+0x72a/0xa10 kernel/time/timer.c:1826
 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1839
 handle_softirqs+0x1db/0x650 kernel/softirq.c:617
 __do_softirq kernel/softirq.c:655 [inline]
 invoke_softirq kernel/softirq.c:472 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:704
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:716
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__schedule+0xcbd/0x1560
Code: 44 24 68 42 0f b6 04 28 84 c0 0f 85 83 02 00 00 41 80 24 24 fc 4c 89 f7 48 8b 74 24 20 e8 4b 95 e2 fb 48 89 c7 e8 03 b0 32 fc <48> 8b 44 24 70 48 c7 84 24 80 00 00 00 0e 36 e0 45 49 c7 44 05 00
RSP: 0018:ffffc90003bdeee0 EFLAGS: 00000282
RAX: 0000000080000001 RBX: 1ffff1103ee070fc RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffffc90003bdeff0 R08: dffffc0000000000 R09: ffffed1022539511
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881129ca880
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8881f70387e0
 preempt_schedule_irq+0xc7/0x140 kernel/sched/core.c:7059
 raw_irqentry_exit_cond_resched+0x2a/0x30 kernel/entry/common.c:396
 irqentry_exit+0x30/0x40 kernel/entry/common.c:439
 sysvec_apic_timer_interrupt+0x55/0xc0 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:unwind_next_frame+0x328/0x700 arch/x86/kernel/unwind_frame.c:305
Code: 3c 10 00 74 08 4c 89 f7 e8 c5 f9 84 00 49 c7 06 00 00 00 00 b0 01 e9 8c 02 00 00 4d 8d 6e 50 4c 89 eb 48 c1 eb 03 80 3c 13 00 <74> 12 4c 89 ef e8 fe f8 84 00 48 ba 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffffc90003bdf198 EFLAGS: 00000246
RAX: ffffc90003bdff30 RBX: 1ffff9200077be4e RCX: ffffffff877a2000
RDX: dffffc0000000000 RSI: ffffffff81c6505b RDI: ffffc90003bdff48
RBP: ffffc90003bdf210 R08: ffffc90003bdf308 R09: 0000000000000006
R10: ffffc90003bdf310 R11: dffffc0000000001 R12: 0000000000000000
R13: ffffc90003bdf270 R14: ffffc90003bdf220 R15: 1ffff9200077be44
 arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
 save_stack+0xf6/0x1e0 mm/page_owner.c:147
 __reset_page_owner+0x54/0x190 mm/page_owner.c:168
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1498 [inline]
 free_pcp_prepare mm/page_alloc.c:1572 [inline]
 free_unref_page_prepare+0x83d/0x850 mm/page_alloc.c:3498
 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3594
 free_the_page mm/page_alloc.c:798 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5803
 __vunmap+0x9f3/0xb60 mm/vmalloc.c:2728
 __vfree mm/vmalloc.c:2776 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2807
 kcov_put kernel/kcov.c:428 [inline]
 kcov_close+0x2b/0x50 kernel/kcov.c:524
 __fput+0x3ab/0x870 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x24d/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xbd5/0x2b80 kernel/exit.c:875
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1025
 get_signal+0x169d/0x1820 kernel/signal.c:2880
 arch_do_signal_or_restart+0xb0/0x16f0 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x74/0xa0 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x26/0x130 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe00437ceb9
Code: Unable to access opcode bytes at 0x7fe00437ce8f.
RSP: 002b:00007fe0050bd038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: 0000000000000003 RBX: 00007fe004535f80 RCX: 00007fe00437ceb9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007fe0043eefbe R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe004535f80 R15: 00007fff79c03fd8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 381 Comm: kworker/u4:4 Tainted: G        W          6.1.93-syzkaller-00070-g7c5c6b6397bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x60 kernel/kcov.c:207
Code: 48 8b 3d 24 e3 fc 05 48 89 de e8 74 69 46 00 5b 5d c3 cc 55 48 89 e5 48 8b 45 08 65 48 8b 0d 60 c8 8c 7e 65 8b 15 61 c8 8c 7e <f7> c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 6c 0b 00 00
RSP: 0018:ffffc9000b68f830 EFLAGS: 00000202
RAX: ffffffff816c09ec RBX: 1ffff1103ee07a99 RCX: ffff888111973cc0
RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000b68f830 R08: ffffffff816c09b5 R09: ffffed103ee271fb
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000800000000 R14: ffff8881f703d4c8 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff638536018 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 csd_lock_wait kernel/smp.c:453 [inline]
 smp_call_function_many_cond+0x86c/0x930 kernel/smp.c:998
 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
 text_poke_bp_batch+0x1e9/0x730 arch/x86/kernel/alternative.c:1534
 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1732
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:455
 jump_label_update+0x3af/0x450 kernel/jump_label.c:801
 static_key_disable_cpuslocked+0xcd/0x1b0 kernel/jump_label.c:207
 static_key_disable+0x1a/0x30 kernel/jump_label.c:215
 toggle_allocation_gate+0x3b4/0x450 mm/kfence/core.c:818
 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299
 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446
 kthread+0x26d/0x300 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>