sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#1 stuck for 112s! [syz.4.55:6145] Modules linked in: irq event stamp: 16223783 hardirqs last enabled at (16223782): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (16223783): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10627108): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10627108): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10627108): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10627111): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10627111): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10627111): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6145 Comm: syz.4.55 Not tainted 6.16.0-rc3-syzkaller-g6e5cae9ddae7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:unwind_next_frame+0x68d/0x2390 arch/x86/kernel/unwind_orc.c:517 Code: 48 8b 54 24 08 4d 8b 27 48 8d 5a 01 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 45 19 00 00 48 89 d8 48 c1 e8 03 0f b6 04 28 <84> c0 0f 84 cb 03 00 00 89 d9 80 e1 07 38 c1 0f 8c be 03 00 00 be RSP: 0018:ffffc90000a08238 EFLAGS: 00000a03 RAX: 0000000000000000 RBX: ffffffff903e3a55 RCX: ffffffff8fbe2670 RDX: ffffffff903e3a54 RSI: ffffffff903e3a58 RDI: ffffffff8be2a1e0 RBP: dffffc0000000000 R08: 000000000000000b R09: ffffffff81729af5 R10: ffffc90000a07fa0 R11: ffffffffa0202fcc R12: ffffc9000baa70d0 R13: ffffc90000a08358 R14: ffffc90000a08308 R15: ffffc90000a08340 FS: 00007fe5506676c0(0000) GS:ffff888125d19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc56ab7f19 CR3: 0000000028366000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_node_noprof+0x276/0x4e0 mm/slub.c:4334 kmalloc_array_node_noprof include/linux/slab.h:1020 [inline] alloc_slab_obj_exts mm/slub.c:1992 [inline] account_slab mm/slub.c:2578 [inline] allocate_slab+0x17c/0x3b0 mm/slub.c:2638 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4204 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3324 ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:114 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:128 [inline] RIP: 0010:lock_is_held_type+0x6c/0x190 kernel/locking/lockdep.c:5939 Code: 8b 2c 25 08 70 a0 92 41 83 bd ec 0a 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 24 24 48 c7 c7 85 c8 9a 8d e8 e7 16 00 00 65 ff 05 20 a4 30 07 41 83 RSP: 0018:ffffc9000baa6838 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff88802b6dda00 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8e13eec0 RBP: 00000000ffffffff R08: ffffffff8fa1f1f7 R09: 1ffffffff1f43e3e R10: dffffc0000000000 R11: fffffbfff1f43e3f R12: 0000000000000246 R13: ffff88802b6dda00 R14: ffffffff8e13eec0 R15: ffff888125d19000 lock_is_held include/linux/lockdep.h:249 [inline] schedule_debug kernel/sched/core.c:5982 [inline] __schedule+0x225/0x4d00 kernel/sched/core.c:6682 preempt_schedule_notrace+0xd1/0x110 kernel/sched/core.c:7058 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:482 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x347/0x360 kernel/locking/lockdep.c:5834 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] is_module_text_address+0x39/0x1e0 kernel/module/main.c:3817 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x18e/0x440 mm/slub.c:4842 free_slab_obj_exts mm/slub.c:2047 [inline] unaccount_slab mm/slub.c:2592 [inline] __free_slab+0xb9/0x1c0 mm/slub.c:2687 __slab_free+0x326/0x400 mm/slub.c:4554 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 alloc_vmap_area+0x26a/0x1490 mm/vmalloc.c:2035 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3179 __vmalloc_node_range_noprof+0x301/0x12f0 mm/vmalloc.c:3845 __vmalloc_node_noprof mm/vmalloc.c:3948 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4022 bpf_check+0x1a5/0x1d2e0 kernel/bpf/verifier.c:24535 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6007 __do_sys_bpf kernel/bpf/syscall.c:6117 [inline] __se_sys_bpf kernel/bpf/syscall.c:6115 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6115 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe54f78e929 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:00007fe550667038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe54f9b6160 RCX: 00007fe54f78e929 RDX: 0000000000000094 RSI: 00002000000001c0 RDI: 0000000000000005 RBP: 00007fe54f810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe54f9b6160 R15: 00007ffd596be7a8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller-g6e5cae9ddae7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:get_data+0x1f2/0x860 kernel/printk/printk_ringbuffer.c:1240 Code: c7 c5 ff ff ff ff 89 d9 49 d3 e5 49 f7 d5 48 bb 00 00 00 00 00 fc ff df 41 80 3c 1c 00 74 08 4c 89 ff e8 a1 e1 82 00 4c 21 ed <4d> 8b 66 08 48 8b 44 24 18 80 3c 18 00 74 08 4c 89 f7 e8 87 e1 82 RSP: 0018:ffffc90000a774c0 EFLAGS: 00000202 RAX: ffffffff81a21727 RBX: dffffc0000000000 RCX: 0000000000000012 RDX: 0000000000000000 RSI: 0000000000000012 RDI: 0000000000000040 RBP: 000000000002b208 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff9200014eec2 R13: 000000000003ffff R14: ffffc90000a77608 R15: ffffc90000a77610 FS: 0000000000000000(0000) GS:ffff888125c19000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55ecbb6038 CR3: 0000000028366000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: copy_data kernel/printk/printk_ringbuffer.c:1827 [inline] prb_read kernel/printk/printk_ringbuffer.c:1936 [inline] _prb_read_valid+0x672/0xa90 kernel/printk/printk_ringbuffer.c:2113 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2185 printk_get_next_message+0x15c/0x7b0 kernel/printk/printk.c:3005 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x4ca/0xc40 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 _printk+0xcf/0x120 kernel/printk/printk.c:2475 check_hung_task kernel/hung_task.c:214 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:298 [inline] watchdog+0xb4f/0x1030 kernel/hung_task.c:470 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245