watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.5:5345] Modules linked in: irq event stamp: 10983317 hardirqs last enabled at (10983316): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10983317): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1037 softirqs last enabled at (10831144): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (10831144): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (10831144): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (10831147): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (10831147): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (10831147): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 5345 Comm: syz.4.5 Not tainted 6.11.0-syzkaller-10575-g9502a7de5a61 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__unwind_start+0x0/0x740 arch/x86/kernel/unwind_orc.c:687 Code: ff ff ff 4c 89 f7 e8 9f 14 bd 00 48 ba 00 00 00 00 00 fc ff df e9 3b ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 89 4c 24 RSP: 0018:ffffc90000007438 EFLAGS: 00000246 RAX: ffff888020f38000 RBX: ffffc90000007530 RCX: ffffc900000074d0 RDX: 0000000000000000 RSI: ffff888020f38000 RDI: ffffc90000007440 RBP: ffffc900000074d0 R08: ffffffff8994f890 R09: 0000000000000000 R10: ffffc900000075c0 R11: fffffbfff284d118 R12: ffff888020f38000 R13: ffffffff81806870 R14: ffffc90000007520 R15: 0000000000000000 FS: 00007fe8639316c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32615ff8 CR3: 0000000079506000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe5/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:247 [inline] slab_post_alloc_hook mm/slub.c:4086 [inline] slab_alloc_node mm/slub.c:4135 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4142 dst_alloc+0x12b/0x190 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x77/0x420 net/ipv6/route.c:3275 ndisc_send_skb+0x32a/0x1380 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4042 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2c5/0x980 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:1037 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1037 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:6997 Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8b 00 00 00 bf 01 00 00 00 e8 d5 9a 96 f5 e8 b0 0c d0 f5 fb bf 01 00 00 00 85 ac ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 75 fb 31 f6 48 RSP: 0018:ffffc900046af640 EFLAGS: 00000286 RAX: de7bcc1722b73900 RBX: 1ffff920008d5ed0 RCX: ffffffff8170892a RDX: dffffc0000000000 RSI: ffffffff8c0aca40 RDI: 0000000000000001 RBP: ffffc900046af700 R08: ffffffff942687c7 R09: 1ffffffff284d0f8 R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: 1ffff920008d5ec8 R13: 1ffff920008d5ecc R14: ffffc900046af660 R15: dffffc0000000000 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:text_poke_bp_batch+0x357/0xb30 arch/x86/kernel/alternative.c:2300 Code: 00 e9 d7 fe ff ff 45 31 e4 31 ff 48 c7 c6 a0 41 35 81 31 d2 b9 01 00 00 00 49 c7 c0 e8 e1 1c 90 e8 1e 85 53 00 83 7c 24 2c 00 <0f> 84 d5 03 00 00 48 8d 84 24 b0 00 00 00 48 ff c0 48 89 44 24 40 RSP: 0018:ffffc900046af7c0 EFLAGS: 00000202 RAX: ffffffff8188d3b2 RBX: 0000000000000001 RCX: 0000000000040000 RDX: ffffc90009d6a000 RSI: 0000000000002ffc RDI: 0000000000002ffd RBP: ffffc900046af920 R08: ffffffff8188d3a9 R09: 1ffffffff284d0f8 R10: dffffc0000000000 R11: fffffbfff284d0f9 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff931aba40 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:10358 perf_try_init_event+0x146/0x810 kernel/events/core.c:11892 perf_init_event kernel/events/core.c:11978 [inline] perf_event_alloc+0x135f/0x2310 kernel/events/core.c:12260 __do_sys_perf_event_open kernel/events/core.c:12767 [inline] __se_sys_perf_event_open+0xb1f/0x3870 kernel/events/core.c:12658 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: 0033:0x7fe862b7dff9 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:00007fe863931038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fe862d35f80 RCX: 00007fe862b7dff9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200015c0 RBP: 00007fe862bf0296 R08: 000000000000000b R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe862d35f80 R15: 00007ffe968874c8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1120 Comm: kworker/u8:6 Not tainted 6.11.0-syzkaller-10575-g9502a7de5a61 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x19f3/0x2ca0 kernel/smp.c:884 Code: 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 96 f9 0b 00 41 83 e4 01 49 bc 00 00 00 00 00 fc ff df 75 07 e8 41 f5 0b 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 25 f5 RSP: 0018:ffffc90003dc6300 EFLAGS: 00000293 RAX: ffffffff8188c01b RBX: 1ffff110170c8ca1 RCX: ffff888027210000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003dc6500 R08: ffffffff8188bfea R09: 1ffff920007b8c50 R10: dffffc0000000000 R11: ffffffff8142e160 R12: dffffc0000000000 R13: ffff8880b8646508 R14: ffff8880b873fc80 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb153c91bd0 CR3: 00000000702f6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:938 [inline] flush_tlb_mm_range+0x329/0x5c0 arch/x86/mm/tlb.c:1024 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:1044 page_mkclean_one+0x280/0x420 mm/rmap.c:1085 rmap_walk_file+0x52f/0x9f0 mm/rmap.c:2700 rmap_walk mm/rmap.c:2718 [inline] folio_mkclean+0x262/0x440 mm/rmap.c:1117 folio_clear_dirty_for_io+0x22b/0xd00 mm/page-writeback.c:3024 mpage_submit_folio+0x88/0x230 fs/ext4/inode.c:1902 mpage_map_and_submit_buffers fs/ext4/inode.c:2167 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2299 [inline] ext4_do_writepages+0x1d1d/0x3d20 fs/ext4/inode.c:2724 ext4_writepages+0x213/0x3c0 fs/ext4/inode.c:2813 do_writepages+0x35d/0x870 mm/page-writeback.c:2683 __writeback_single_inode+0x14f/0x10d0 fs/fs-writeback.c:1658 writeback_sb_inodes+0x80c/0x1370 fs/fs-writeback.c:1954 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2025 wb_writeback+0x42f/0xbd0 fs/fs-writeback.c:2136 wb_check_old_data_flush fs/fs-writeback.c:2240 [inline] wb_do_writeback fs/fs-writeback.c:2293 [inline] wb_workfn+0xba1/0x1090 fs/fs-writeback.c:2321 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 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