ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.2.7258:25895] Modules linked in: irq event stamp: 85317 hardirqs last enabled at (85316): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357 hardirqs last disabled at (85317): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (35720): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (35720): [] handle_softirqs+0x5bb/0x8f0 kernel/softirq.c:582 softirqs last disabled at (35725): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (35725): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (35725): [] __irq_exit_rcu kernel/softirq.c:637 [inline] softirqs last disabled at (35725): [] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 CPU: 0 UID: 0 PID: 25895 Comm: syz.2.7258 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:queued_write_lock_slowpath+0x179/0x330 kernel/locking/qrwlock.c:85 Code: 03 3d 00 01 00 00 74 37 48 b8 00 00 00 00 00 fc ff df 48 89 d9 48 89 da 48 c1 e9 03 83 e2 07 48 01 c1 83 c2 03 f3 90 0f b6 01 <38> c2 7c 08 84 c0 0f 85 5f 01 00 00 8b 03 3d 00 01 00 00 75 e6 48 RSP: 0018:ffffc900000075f8 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffffff900c9920 RCX: fffffbfff2019324 RDX: 0000000000000003 RSI: 0000000000000004 RDI: ffffffff900c9920 RBP: 1ffff92000000ec1 R08: 0000000000000001 R09: fffffbfff2019324 R10: ffffffff900c9923 R11: 0000000000000000 R12: ffffffff900c9924 R13: 0000000000000003 R14: fffffbfff2019324 R15: ffffc90000007638 FS: 000055558b995500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000040 CR3: 000000005fb8c000 CR4: 0000000000350ef0 Call Trace: queued_write_lock include/asm-generic/qrwlock.h:101 [inline] do_raw_write_lock+0x1d4/0x3a0 kernel/locking/spinlock_debug.c:211 ___neigh_create+0x9dd/0x2ac0 net/core/neighbour.c:682 ip6_finish_output2+0x121c/0x1a50 net/ipv6/ip6_output.c:132 __ip6_finish_output net/ipv6/ip6_output.c:215 [inline] ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:226 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247 dst_output include/net/dst.h:450 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xa2d/0x1c30 net/ipv6/ndisc.c:511 ndisc_send_rs+0x129/0x670 net/ipv6/ndisc.c:721 addrconf_rs_timer+0x407/0x840 net/ipv6/addrconf.c:4042 call_timer_fn+0x1a3/0x610 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers+0x6e8/0x930 kernel/time/timer.c:2419 __run_timer_base kernel/time/timer.c:2430 [inline] __run_timer_base kernel/time/timer.c:2423 [inline] run_timer_base+0x111/0x190 kernel/time/timer.c:2439 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x47f/0x1300 kernel/smp.c:884 Code: 00 f3 90 41 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a4 0c 00 00 8b 43 08 31 ff 83 e0 01 41 89 c5 89 c6 e8 a4 1d 0c 00 45 85 ed <75> d0 e8 5a 1b 0c 00 e8 55 1b 0c 00 44 8b 6c 24 20 bf 07 00 00 00 RSP: 0018:ffffc9000c74fa50 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880b8744d00 RCX: ffffffff81815eec RDX: ffff88801eb9da00 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170e89a1 R13: 0000000000000001 R14: ffff8880b8744d08 R15: ffff8880b8640140 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x22b/0x760 arch/x86/kernel/alternative.c:2295 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_flush arch/x86/kernel/alternative.c:2483 [inline] text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x1d7/0x400 kernel/jump_label.c:920 static_key_disable_cpuslocked+0x158/0x1c0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 tracepoint_remove_func kernel/tracepoint.c:417 [inline] tracepoint_probe_unregister+0x4a7/0xd30 kernel/tracepoint.c:551 bpf_raw_tp_link_release+0x35/0x70 kernel/bpf/syscall.c:3479 bpf_link_free+0x12f/0x2b0 kernel/bpf/syscall.c:3005 bpf_link_put_direct kernel/bpf/syscall.c:3045 [inline] bpf_link_release+0x5d/0x80 kernel/bpf/syscall.c:3052 __fput+0x3f9/0xb60 fs/file_table.c:431 task_work_run+0x151/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8c7277e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc10d05708 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00000000000f4cb0 RCX: 00007f8c7277e719 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f8c72937a80 R08: 0000000000000001 R09: 00007ffc10d059ff R10: 00007f8c72600000 R11: 0000000000000246 R12: 00000000000f4d5f R13: 00007ffc10d05810 R14: 0000000000000032 R15: ffffffffffffffff Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1147 Comm: kworker/u8:9 Not tainted 6.12.0-rc7-syzkaller-00187-gf868cd251776 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: events_unbound linkwatch_event RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x70 kernel/kcov.c:217 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 a4 61 76 7e 65 8b 05 a5 61 76 7e a9 00 01 ff 00 48 8b 34 24 <74> 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b RSP: 0018:ffffc90000a18e28 EFLAGS: 00000006 RAX: 0000000000010201 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888027561e00 RSI: ffffffff817ab7e7 RDI: 0000000000000001 RBP: 18144f8bf4000000 R08: 0000000000000000 R09: ffffed10170e5938 R10: ffff8880b872c9c3 R11: 0000000000000000 R12: ffff88804abb6340 R13: ffff8880b872cac0 R14: ffff8880b872c9c0 R15: ffffffff8930aff0 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa5ed5a5fb0 CR3: 0000000066814000 CR4: 0000000000350ef0 Call Trace: trace_hrtimer_expire_entry include/trace/events/timer.h:259 [inline] __run_hrtimer kernel/time/hrtimer.c:1688 [inline] __hrtimer_run_queues+0x547/0xae0 kernel/time/hrtimer.c:1755 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1817 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x112/0x400 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 7e 60 e8 a3 ff ff ff 31 c0 e9 d7 c6 c2 09 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 a4 61 76 7e 65 8b 05 a5 61 76 7e a9 00 01 RSP: 0018:ffffc90003f27908 EFLAGS: 00000283 RAX: 0000000000000000 RBX: 0000000000000800 RCX: ffffffff88fe8316 RDX: ffff888027561e00 RSI: 0000000000000240 RDI: 0000000000000004 RBP: ffffed100fd7c1a0 R08: 0000000000000004 R09: 0000000000000240 R10: 0000000000000800 R11: 0000000000000000 R12: 0000000000000000 R13: ffffed100fd7c1a1 R14: 0000000000000240 R15: dffffc0000000000 neigh_flush_dev+0x114/0x930 net/core/neighbour.c:391 __neigh_ifdown.isra.0+0x54/0x400 net/core/neighbour.c:446 neigh_carrier_down+0x21/0x30 net/core/neighbour.c:457 ndisc_netdev_event+0x441/0x560 net/ipv6/ndisc.c:1919 notifier_call_chain+0xbc/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996 netdev_state_change net/core/dev.c:1378 [inline] netdev_state_change+0x115/0x150 net/core/dev.c:1371 linkwatch_do_dev+0x12b/0x160 net/core/link_watch.c:177 __linkwatch_run_queue+0x233/0x690 net/core/link_watch.c:234 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:277 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244