sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#1 stuck for 131s! [syz.3.7313:6897] Modules linked in: irq event stamp: 16908823 hardirqs last enabled at (16908822): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (16908823): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (16892100): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (16892100): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (16892100): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (16892103): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (16892103): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (16892103): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 6897 Comm: syz.3.7313 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_next_frame+0xca9/0x23c0 arch/x86/kernel/unwind_orc.c:-1 Code: c4 48 8d 5e 01 48 8b 44 24 40 0f b6 04 28 84 c0 0f 85 68 11 00 00 49 89 df 49 c1 ef 03 41 0f b6 04 2f 84 c0 0f 85 78 11 00 00 <0f> b6 76 01 83 e6 07 83 fe 04 0f 84 4e 04 00 00 83 fe 03 0f 84 f5 RSP: 0018:ffffc90000a08498 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff90f0dcdf RCX: ffffffff905bceb4 RDX: ffffffff90f0dcda RSI: ffffffff90f0dcde RDI: ffffffff8c278820 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e7603e0 R10: ffffc90000a080c8 R11: ffffffff81aff200 R12: ffffc90002f775e0 R13: ffffc90000a085b8 R14: ffffc90000a08568 R15: 1ffffffff21e1b9b FS: 00007fbd8587c6c0(0000) GS:ffff888125596000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f30752aac92 CR3: 0000000036abc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff2 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4459 [inline] slab_alloc_node mm/slub.c:4788 [inline] kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4795 skb_clone+0x212/0x3a0 net/core/skbuff.c:2120 hsr_forward_do net/hsr/hsr_forward.c:-1 [inline] hsr_forward_skb+0x1028/0x2860 net/hsr/hsr_forward.c:743 send_hsr_supervision_frame+0x731/0xcb0 net/hsr/hsr_device.c:364 hsr_announce+0x1db/0x370 net/hsr/hsr_device.c:421 call_timer_fn+0x192/0x5a0 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x7e/0x90 kernel/kcov.c:323 Code: c1 e1 05 4c 8d 51 28 4d 39 ca 77 1e 49 ff c0 4c 89 02 48 c7 44 0a 08 07 00 00 00 48 89 7c 0a 10 48 89 74 0a 18 48 89 44 0a 20 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 RSP: 0018:ffffc90002f76110 EFLAGS: 00000297 RAX: ffffffff81c90369 RBX: 0000000000000000 RCX: ffff88802ca99e40 RDX: 0000000000000002 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffc90002f7638f R09: 0000000000000000 R10: ffffc90002f76380 R11: fffff520005eec72 R12: 0000000000000002 R13: dffffc0000000000 R14: 0000000000000002 R15: dffffc0000000000 tracing_gen_ctx_irq_test+0x39/0x160 kernel/trace/trace.c:2603 tracing_gen_ctx_flags include/linux/trace_events.h:201 [inline] tracing_gen_ctx include/linux/trace_events.h:208 [inline] perf_trace_buf_update+0x3f/0x190 kernel/trace/trace_event_perf.c:429 perf_tp_event+0x157/0x29b0 kernel/events/core.c:11368 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11306 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x326/0x3f0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x379/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] is_bpf_text_address+0x28d/0x2b0 kernel/bpf/core.c:750 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x1584/0x52b0 kernel/sched/core.c:6907 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_notrace_thunk+0x0/0x30 arch/x86/entry/thunk.S:13 Code: 41 5b 41 5a 41 59 41 58 58 59 5a 5e 5f 5d e9 57 fc 6f 0a 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 5a 48 6e 0a RSP: 0018:ffffc90002f76e10 EFLAGS: 00000246 RAX: 11ecde0cbf36ad00 RBX: ffffffff81ae672d RCX: f8f8f8f8f8f8f8f8 RDX: ffffc90024d86000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 0000000000000000 R08: ffffc90002f76ad7 R09: 0000000000000000 R10: ffffc90002f76ac8 R11: fffff520005eed5b R12: ffff88802ca99e40 R13: ffffffff81ae672d R14: ffffffff8e7603e0 R15: ffffffff8e7603e0 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x391/0x3a0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:322 [inline] rcu_read_unlock include/linux/rcupdate.h:881 [inline] class_rcu_destructor include/linux/rcupdate.h:1193 [inline] is_module_text_address+0x18b/0x1e0 kernel/module/main.c:3858 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 __call_rcu_common kernel/rcu/tree.c:3131 [inline] call_rcu+0xee/0x890 kernel/rcu/tree.c:3251 kernfs_put+0x18e/0x470 fs/kernfs/dir.c:591 kernfs_remove_by_name_ns+0xb7/0x130 fs/kernfs/dir.c:1723 kernfs_remove_by_name include/linux/kernfs.h:633 [inline] remove_files fs/sysfs/group.c:28 [inline] sysfs_remove_group+0xfc/0x2e0 fs/sysfs/group.c:328 sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:352 device_remove_groups drivers/base/core.c:2843 [inline] device_remove_attrs+0x1cb/0x280 drivers/base/core.c:2973 device_del+0x51f/0x8f0 drivers/base/core.c:3877 unregister_netdevice_many_notify+0x1e0e/0x2370 net/core/dev.c:12431 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline] ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248 setup_net+0x2f0/0x340 net/core/net_namespace.c:462 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:581 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:130 copy_namespaces+0x438/0x4b0 kernel/nsproxy.c:195 copy_process+0x18e2/0x3cf0 kernel/fork.c:2226 kernel_clone+0x248/0x870 kernel/fork.c:2654 __do_sys_clone kernel/fork.c:2795 [inline] __se_sys_clone kernel/fork.c:2779 [inline] __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2779 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbd8499bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbd8587bfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fbd84c15fa0 RCX: 00007fbd8499bf79 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007fbd84a327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007fbd84c16038 R14: 00007fbd84c15fa0 R15: 00007ffeaa2f9248 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6969 Comm: syz.9.7332 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:native_apic_msr_eoi+0xf/0x20 arch/x86/include/asm/apic.h:214 Code: 48 89 d6 31 d2 e9 21 0f 6f 03 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa b9 0b 08 00 00 31 c0 31 d2 0f 30 bc 2a 2f 0a cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffc90000007590 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffc900000075d8 RCX: 000000000000080b RDX: 0000000000000000 RSI: ffffffff8bc8d980 RDI: ffffffff8c278880 RBP: 0000000000000000 R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe476ed16c0(0000) GS:ffff888125496000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f67f8d8e080 CR3: 0000000093fc2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: apic_eoi arch/x86/include/asm/apic.h:410 [inline] __sysvec_apic_timer_interrupt+0x45/0x3d0 arch/x86/kernel/apic/apic.c:1060 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:ip6_pol_route+0x4af/0x13d0 net/ipv6/route.c:2292 Code: 27 30 7b f7 eb 05 e8 20 30 7b f7 49 bf 00 00 00 00 00 fc ff df 48 8b 5c 24 18 48 83 c3 13 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 0f 85 c4 0d 00 00 0f b6 1b 89 de 83 e6 02 31 ff e8 ea 32 7b RSP: 0018:ffffc90000007680 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc90000007953 RCX: ffff888028c41e40 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000007790 R08: 0000000000000000 R09: ffff888067dad140 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: 0000000000000000 R13: ffffc90000007968 R14: 0000000000000000 R15: dffffc0000000000 pol_lookup_func include/net/ip6_fib.h:617 [inline] fib6_rule_lookup+0x556/0x730 net/ipv6/fib6_rules.c:120 ip6_route_input_lookup net/ipv6/route.c:2351 [inline] ip6_route_input+0x730/0xad0 net/ipv6/route.c:2654 ip6_rcv_finish+0x141/0x2e0 net/ipv6/ip6_input.c:77 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318 __netif_receive_skb_one_core net/core/dev.c:6149 [inline] __netif_receive_skb net/core/dev.c:6262 [inline] process_backlog+0x7dd/0x1950 net/core/dev.c:6614 __napi_poll+0xae/0x340 net/core/dev.c:7678 napi_poll net/core/dev.c:7741 [inline] net_rx_action+0x627/0xf70 net/core/dev.c:7893 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_is_held_type+0x107/0x150 kernel/locking/lockdep.c:5945 Code: 00 00 b8 ff ff ff ff 65 0f c1 05 04 20 78 07 83 f8 01 75 25 9c 58 a9 00 02 00 00 75 39 41 f7 c4 00 02 00 00 74 01 fb 89 d8 5b <41> 5c 41 5d 41 5e 41 5f 5d e9 8b e1 02 00 cc 90 0f 0b 90 48 c7 c7 RSP: 0018:ffffc90010716d50 EFLAGS: 00000206 RAX: 0000000000000000 RBX: ffffc90010710000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8e15b390 RDI: ffffffff8c278880 RBP: 00000000ffffffff R08: ffffffff90111eb7 R09: 1ffffffff20223d6 R10: dffffc0000000000 R11: fffffbfff20223d7 R12: 0000000000000246 R13: ffff888028c41e40 R14: ffffffff8e760440 R15: 0000000000000001 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5874 [inline] __schedule+0x20a/0x52b0 kernel/sched/core.c:6783 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7234 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: 8b 3d b4 7c 55 0c 48 89 de 5b e9 83 cd 5d 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d d8 ec 53 11 65 8b 15 f9 ec 53 11 81 e2 00 01 ff 00 74 RSP: 0018:ffffc900107170b0 EFLAGS: 00000296 RAX: ffffffff823a4d08 RBX: 0000000000000003 RCX: ffff888028c41e40 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffea0001a45000 RBP: dffffc0000000000 R08: ffff8880361abc6f R09: 1ffff11006c3578d R10: dffffc0000000000 R11: ffffed1006c3578e R12: fffa800069148000 R13: ffffea0001a45000 R14: 1ffffffff1c333d9 R15: 0000000000000000 __page_table_check_zero+0x28/0x3e0 mm/page_table_check.c:132 page_table_check_alloc include/linux/page_table_check.h:38 [inline] post_alloc_hook+0x240/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1896 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3961 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5249 alloc_slab_page mm/slub.c:3238 [inline] allocate_slab+0x77/0x660 mm/slub.c:3411 new_slab mm/slub.c:3469 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7091 refill_sheaf mm/slub.c:2787 [inline] __pcs_replace_empty_main+0x2b9/0x620 mm/slub.c:4536 alloc_from_pcs mm/slub.c:4639 [inline] slab_alloc_node mm/slub.c:4773 [inline] __do_kmalloc_node mm/slub.c:5176 [inline] __kmalloc_noprof+0x474/0x760 mm/slub.c:5189 kmalloc_noprof include/linux/slab.h:966 [inline] tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x229/0x470 security/tomoyo/file.c:776 security_file_open+0xa9/0x240 security/security.c:2636 do_dentry_open+0x384/0x14e0 fs/open.c:926 vfs_open+0x3b/0x340 fs/open.c:1081 do_open fs/namei.c:4671 [inline] path_openat+0x2e08/0x3860 fs/namei.c:4830 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe475f9bf79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe476ed1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe476215fa0 RCX: 00007fe475f9bf79 RDX: 00000000000026e1 RSI: 00002000000002c0 RDI: ffffffffffffff9c RBP: 00007fe4760327e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe476216038 R14: 00007fe476215fa0 R15: 00007ffd0edf16a8