watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.363:7055] Modules linked in: irq event stamp: 11252985 hardirqs last enabled at (11252984): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11252985): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (83028): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (83028): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (83028): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (83031): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (83031): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (83031): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 7055 Comm: syz.2.363 Not tainted 6.11.0-rc4-syzkaller-00280-g8a3f14bb1e94 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:check_preemption_disabled+0x0/0x120 lib/smp_processor_id.c:13 Code: c7 20 84 60 8c 48 c7 c6 60 84 60 8c eb 1c 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 57 41 56 41 54 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 RSP: 0018:ffffc90000007320 EFLAGS: 00000246 RAX: 1ffff1100ce4e814 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffff888062c45a00 RSI: ffffffff8c608460 RDI: ffffffff8c608420 RBP: ffff8880672740a0 R08: ffffffff867152e8 R09: 1ffffffff2030ba5 R10: dffffc0000000000 R11: fffffbfff2030ba6 R12: ffff88807bcb7000 R13: ffff88805b500000 R14: 0000607f47456200 R15: ffffffff86714d1a FS: 00007f10027766c0(0000) GS:ffff8880b8800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020034000 CR3: 0000000028b64000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: dev_sw_netstats_tx_add include/linux/netdevice.h:2774 [inline] veth_xmit+0x664/0xae0 drivers/net/veth.c:377 __netdev_start_xmit include/linux/netdevice.h:4913 [inline] netdev_start_xmit include/linux/netdevice.h:4922 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596 __dev_queue_xmit+0x1b63/0x3e90 net/core/dev.c:4423 dev_queue_xmit include/linux/netdevice.h:3105 [inline] neigh_hh_output include/net/neighbour.h:526 [inline] neigh_output include/net/neighbour.h:540 [inline] ip6_finish_output2+0xfc2/0x1680 net/ipv6/ip6_output.c:137 ip6_finish_output+0x41e/0x810 net/ipv6/ip6_output.c:222 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4040 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:finish_task_switch+0x1ea/0x870 kernel/sched/core.c:5062 Code: c9 50 e8 d9 b6 0b 00 48 83 c4 08 4c 89 f7 e8 7d 38 00 00 0f 1f 44 00 00 4c 89 f7 e8 b0 70 5f 0a e8 ab d8 36 00 fb 48 8b 5d c0 <48> 8d bb f8 15 00 00 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc RSP: 0018:ffffc90005347408 EFLAGS: 00000286 RAX: a7b93540ca94e400 RBX: ffff888062c45a00 RCX: ffffffff8170432a RDX: dffffc0000000000 RSI: ffffffff8c0ad560 RDI: ffffffff8c608480 RBP: ffffc90005347450 R08: ffffffff941e1847 R09: 1ffffffff283c308 R10: dffffc0000000000 R11: fffffbfff283c309 R12: 1ffff11017107eeb R13: dffffc0000000000 R14: ffff8880b883e9c0 R15: ffff8880b883f758 context_switch kernel/sched/core.c:5191 [inline] __schedule+0x1808/0x4a60 kernel/sched/core.c:6529 preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708 preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12 on_each_cpu_cond_mask+0x79/0x80 kernel/smp.c:1024 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x352/0xb30 arch/x86/kernel/alternative.c:2295 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10245 perf_try_init_event+0x139/0x3f0 kernel/events/core.c:11720 perf_init_event kernel/events/core.c:11790 [inline] perf_event_alloc+0x131a/0x22d0 kernel/events/core.c:12070 __do_sys_perf_event_open kernel/events/core.c:12577 [inline] __se_sys_perf_event_open+0xb43/0x38d0 kernel/events/core.c:12468 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f100197cef9 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:00007f1002776038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f1001b35f80 RCX: 00007f100197cef9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f10019ef046 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1001b35f80 R15: 00007fffda158718 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.11.0-rc4-syzkaller-00280-g8a3f14bb1e94 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:csd_lock_wait kernel/smp.c:312 [inline] RIP: 0010:smp_call_function_many_cond+0x1860/0x29d0 kernel/smp.c:856 Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 39 15 0c 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 e4 10 0c 00 eb 38 f3 90 <42> 0f b6 04 23 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 c8 10 RSP: 0018:ffffc90000bc5ec0 EFLAGS: 00000293 RAX: ffffffff81877c28 RBX: 1ffff11017108c59 RCX: ffff88801ad71e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000bc60a0 R08: ffffffff81877bf7 R09: 1ffff92000178bc8 R10: dffffc0000000000 R11: ffffffff8142e5e0 R12: dffffc0000000000 R13: ffff8880b88462c8 R14: ffff8880b893fb40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f00cfad38 CR3: 0000000067536000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:941 [inline] flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1027 flush_tlb_page arch/x86/include/asm/tlbflush.h:254 [inline] ptep_clear_flush+0x11a/0x170 mm/pgtable-generic.c:101 page_vma_mkclean_one+0x58a/0x9a0 mm/rmap.c:1029 page_mkclean_one+0x280/0x420 mm/rmap.c:1070 rmap_walk_file+0x52f/0x9f0 mm/rmap.c:2687 rmap_walk mm/rmap.c:2705 [inline] folio_mkclean+0x262/0x440 mm/rmap.c:1102 folio_clear_dirty_for_io+0x22b/0xcf0 mm/page-writeback.c:3024 mpage_submit_folio+0x88/0x230 fs/ext4/inode.c:1924 mpage_process_page_bufs+0x6c9/0x8d0 fs/ext4/inode.c:2056 mpage_prepare_extent_to_map+0xec7/0x1c80 fs/ext4/inode.c:2564 ext4_do_writepages+0xc52/0x3d40 fs/ext4/inode.c:2706 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2842 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1651 writeback_sb_inodes+0x99c/0x1380 fs/fs-writeback.c:1947 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2018 wb_writeback+0x495/0xd40 fs/fs-writeback.c:2129 wb_check_old_data_flush fs/fs-writeback.c:2233 [inline] wb_do_writeback fs/fs-writeback.c:2286 [inline] wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2314 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244