watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.1.203:1221] Modules linked in: CPU: 0 PID: 1221 Comm: syz.1.203 Not tainted 6.1.93-syzkaller-00070-g7c5c6b6397bb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:stack_trace_consume_entry+0xa1/0x290 kernel/stacktrace.c:93 Code: 22 41 ff ce 41 0f b6 44 15 00 84 c0 0f 85 78 01 00 00 44 89 37 b0 01 e9 a1 00 00 00 31 c0 e9 9a 00 00 00 48 89 d8 48 c1 e8 03 <80> 3c 10 00 4c 89 55 c8 74 2a 48 89 df 49 89 f5 4c 89 45 d0 4d 89 RSP: 0018:ffffc90000006e28 EFLAGS: 00000a02 RAX: 1ffff92000000dec RBX: ffffc90000006f60 RCX: ffffffff877a2000 RDX: dffffc0000000000 RSI: ffffffff8519235a RDI: ffffc90000006f6c RBP: ffffc90000006e70 R08: ffffc90000006f68 R09: 0000000000000013 R10: ffffc90000006f70 R11: dffffc0000000001 R12: 1ffff92000000ded R13: 1ffff92000000ded R14: 0000000000000000 R15: 1ffff92000000dee FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f571de07f98 CR3: 0000000006e0f000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x101/0x140 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 __call_rcu_common kernel/rcu/tree.c:2806 [inline] call_rcu+0xee/0x1340 kernel/rcu/tree.c:2925 call_rcu_hurry include/linux/rcupdate.h:117 [inline] dst_release+0x9b/0xe0 net/core/dst.c:177 refdst_drop include/net/dst.h:256 [inline] skb_dst_drop include/net/dst.h:268 [inline] __dev_queue_xmit+0xa42/0x36e0 net/core/dev.c:4255 dev_queue_xmit include/linux/netdevice.h:3076 [inline] neigh_resolve_output+0x6e3/0x7f0 net/core/neighbour.c:1563 neigh_output include/net/neighbour.h:552 [inline] ip6_finish_output2+0x122b/0x1840 net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:201 [inline] ip6_finish_output+0x50f/0xa60 net/ipv6/ip6_output.c:212 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip6_output+0x1f7/0x4c0 net/ipv6/ip6_output.c:233 dst_output include/net/dst.h:444 [inline] NF_HOOK include/linux/netfilter.h:305 [inline] ndisc_send_skb+0x7cf/0xdc0 net/ipv6/ndisc.c:509 ndisc_send_rs+0x47d/0x5f0 net/ipv6/ndisc.c:719 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 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:653 RIP: 0010:__schedule+0xcf2/0x1560 kernel/sched/core.c:6755 Code: 00 00 0e 36 e0 45 49 c7 44 05 00 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 c0 00 00 00 0f 85 80 05 00 00 48 8d 65 d8 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 4c 89 f7 e8 0b e4 33 fc 65 8b 0d RSP: 0018:ffffc9000b577048 EFLAGS: 00000246 RAX: 3f980db1a8ce7700 RBX: ffff888118af4228 RCX: 0000000000000002 RDX: 0000000040000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffc9000b577070 R08: ffffffff819b57d0 R09: fffffbfff0ee51bf R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7038748 R13: dffffc0000000000 R14: ffff888118af3cc0 R15: 1ffff1102315e845 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_get_return_address+0x0/0x90 arch/x86/kernel/unwind_frame.c:15 Code: 5d c3 48 c7 c1 00 18 ee 86 80 e1 07 80 c1 03 38 c1 7c af 48 c7 c7 00 18 ee 86 e8 4b fd 84 00 eb a1 cc cc cc cc cc cc cc cc cc <55> 48 89 e5 41 57 41 56 53 48 89 fb 49 be 00 00 00 00 00 fc ff df RSP: 0018:ffffc9000b577218 EFLAGS: 00000202 RAX: ffffc9000b5772b0 RBX: ffffc9000b577220 RCX: 1ffff920016aee4b RDX: 1ffff920016aee46 RSI: ffffc9000b5772b0 RDI: ffffc9000b577220 RBP: ffffc9000b5772b0 R08: dffffc0000000001 R09: ffffc9000b577220 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888118af3cc0 R13: ffffffff8165c680 R14: ffffc9000b577300 R15: 0000000000000000 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 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:316 irqentry_exit+0x12/0x40 kernel/entry/common.c:419 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: 0033:0x7f9f7897ceb9 Code: Unable to access opcode bytes at 0x7f9f7897ce8f. RSP: 002b:00007f9f787ff038 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f9f78b35f80 RCX: 00007f9f7897ceb9 RDX: 00000000200006c0 RSI: 0000000000005452 RDI: 0000000000000006 RBP: 00007f9f789eefbe R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9f78b35f80 R15: 00007ffca8e90bc8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 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:csd_lock_wait kernel/smp.c:453 [inline] RIP: 0010:smp_call_function_many_cond+0x851/0x930 kernel/smp.c:998 Code: 3e 44 89 fe 83 e6 01 31 ff e8 4b 9f 09 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 0a e8 86 9b 09 00 e9 2f ff ff ff f3 90 <42> 0f b6 04 3b 84 c0 75 14 41 f7 06 01 00 00 00 0f 84 12 ff ff ff RSP: 0018:ffffc900000a7840 EFLAGS: 00000293 RAX: ffffffff816c09ec RBX: 1ffff1103ee07a99 RCX: ffff888100399440 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900000a7958 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: 00007f7f7d135f40 CR3: 0000000006e0f000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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