sched: DL replenish lagged too much watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.3.132:6438] Modules linked in: irq event stamp: 11963083 hardirqs last enabled at (11963082): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (11963083): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (10968164): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (10968164): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (10968164): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (10968167): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (10968167): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (10968167): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 6438 Comm: syz.3.132 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_get_return_address+0x68/0x90 arch/x86/kernel/unwind_orc.c:386 Code: 89 df e8 fb 59 b9 00 48 8b 3b e8 53 6c 19 00 85 c0 74 14 43 80 3c 37 00 74 08 48 89 df e8 e0 59 b9 00 48 8b 03 eb 02 31 c0 5b <41> 5e 41 5f c3 cc cc cc cc cc 89 d9 80 e1 07 80 c1 03 38 c1 7c a8 RSP: 0018:ffffc90000a088f0 EFLAGS: 00000246 RAX: ffffffff8187f60a RBX: ffffc90000a089c0 RCX: 0000000000000100 RDX: 0000000000000001 RSI: ffffffff8e163670 RDI: ffffffff8187f60a RBP: ffffc90000a08990 R08: ffffc90000a08f28 R09: 0000000000000000 R10: ffffc90000a08958 R11: fffff5200014112d R12: ffff888031e2dac0 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200014112a FS: 00007f21477f46c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd91e42be80 CR3: 000000003383c000 CR4: 00000000003526f0 Call Trace: 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 slab_free_hook mm/slub.c:2653 [inline] slab_free mm/slub.c:6143 [inline] kmem_cache_free+0x426/0x630 mm/slub.c:6273 mempool_free+0xec/0x130 mm/mempool.c:711 blk_update_request+0x57e/0xe60 block/blk-mq.c:1016 scsi_end_request+0x7c/0x820 drivers/scsi/scsi_lib.c:647 scsi_io_completion+0x131/0x360 drivers/scsi/scsi_lib.c:1088 blk_complete_reqs block/blk-mq.c:1253 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1258 handle_softirqs+0x22a/0x870 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:finish_task_switch+0x245/0x920 kernel/sched/core.c:5152 Code: 00 00 48 85 db 0f 85 e8 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 49 83 c4 48 4c 89 e7 e8 25 1e 1b 0a e8 70 7e 38 00 fb 4c 8b 65 c0 <49> 8d bc 24 30 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc900059ff1b8 EFLAGS: 00000206 RAX: 000000000004c4ed RBX: 0000000000000000 RCX: 0000000080000001 RDX: 0000000000000007 RSI: ffffffff8def2e17 RDI: ffffffff8c27ae80 RBP: ffffc900059ff210 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: ffff888031e2dac0 R13: dffffc0000000000 R14: ffff88807e9b5ac0 R15: ffff8880b873b918 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x158d/0x5340 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:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872 Code: e9 30 ff ff ff e8 65 f5 0b 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 e1 52 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 c6 db 0e 0a cc 48 8d 3d 9e 63 73 RSP: 0018:ffffc900059ff558 EFLAGS: 00000282 RAX: e508e8160f70a300 RBX: 0000000000000246 RCX: 0000000000000046 RDX: 00000000c238b59b RSI: ffffffff8e163670 RDI: ffffffff8c27ae80 RBP: 0000000000000000 R08: ffffffff81767a45 R09: ffffffff8e7602e0 R10: ffffc900059ff320 R11: ffffffffa0201a18 R12: 0000000000000002 R13: ffffffff8e7602e0 R14: 0000000000000000 R15: 0000000000000000 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xc2b/0xdb0 mm/page_alloc.c:2978 __slab_free+0x263/0x2b0 mm/slub.c:5551 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4515 [inline] slab_alloc_node mm/slub.c:4844 [inline] kmem_cache_alloc_node_noprof+0x384/0x690 mm/slub.c:4896 perf_event_alloc+0x1cb/0x2e30 kernel/events/core.c:13252 __do_sys_perf_event_open kernel/events/core.c:13886 [inline] __se_sys_perf_event_open+0x7a9/0x1d60 kernel/events/core.c:13767 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: 0033:0x7f214699c799 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:00007f21477f4028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f2146c16090 RCX: 00007f214699c799 RDX: ffefffffffffffff RSI: 0000000000000000 RDI: 0000200000000fc0 RBP: 00007f2146a32bd9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f2146c16128 R14: 00007f2146c16090 R15: 00007ffd142f31c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1298 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:strlen+0x35/0x70 lib/string.c:420 Code: 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 <49> 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 d9 80 e1 07 38 c1 7c RSP: 0018:ffffc900051beff8 EFLAGS: 00000086 RAX: 0000000000000000 RBX: ffffffff8bcd89c9 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8e752678 RDI: ffffffff8bcd89c0 RBP: ffffc900051bf118 R08: 0000000000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff1cbd9ec R12: ffffffff8e62c240 R13: ffffffff8e752678 R14: dffffc0000000000 R15: 0000000000000007 FS: 0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555587c124e8 CR3: 000000003383c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __fortify_strlen include/linux/fortify-string.h:266 [inline] trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline] do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0xde/0x440 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 console_lock_spinning_enable kernel/printk/printk.c:1896 [inline] console_emit_next_record kernel/printk/printk.c:3177 [inline] console_flush_one_record kernel/printk/printk.c:3269 [inline] console_flush_all+0x67f/0xb20 kernel/printk/printk.c:3343 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479 dev_vprintk_emit+0x355/0x420 drivers/base/core.c:4913 dev_printk_emit+0xee/0x140 drivers/base/core.c:4924 __netdev_printk+0x3e1/0x480 net/core/dev.c:12932 netdev_warn+0x11e/0x180 net/core/dev.c:12985 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5275 [inline] netdev_start_xmit include/linux/netdevice.h:5284 [inline] xmit_one net/core/dev.c:3871 [inline] dev_hard_start_xmit+0x2d8/0x870 net/core/dev.c:3887 sch_direct_xmit+0x251/0x4c0 net/sched/sch_generic.c:347 __dev_xmit_skb net/core/dev.c:4186 [inline] __dev_queue_xmit+0x1550/0x3890 net/core/dev.c:4802 dev_queue_xmit include/linux/netdevice.h:3384 [inline] tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62 kthread+0x1e0/0x3f0 drivers/block/aoe/aoecmd.c:1241 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245