rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=47c4/1/0x4000000000000000 softirq=32894/32895 fqs=5124 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 27620 24858 21 ==> 52480(ms) rcu: (t=10500 jiffies g=44005 q=2774 ncpus=2) CPU: 0 PID: 6721 Comm: udevd Not tainted 6.5.0-rc2-syzkaller-00052-gbfa3037d8280 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:write_comp_data+0x85/0x90 kernel/kcov.c:262 Code: 00 00 4a 8d 34 dd 28 00 00 00 48 39 f2 72 1b 48 83 c7 01 48 89 38 4c 89 44 30 e0 4c 89 4c 30 e8 4c 89 54 30 f0 4a 89 4c d8 20 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 48 8b 0c 24 40 0f b6 RSP: 0018:ffffc90000007d58 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88802b617394 RCX: ffffffff885968e1 RDX: ffff888013b0d940 RSI: 0000000000000100 RDI: 0000000000000004 RBP: 000000000000000b R08: 0000000000000004 R09: 000000000000000b R10: 000000000000000c R11: 0000000000000000 R12: 0000000000000008 R13: ffff88802a2a4b60 R14: 000000000000000c R15: 0000000000000001 FS: 00007f1764d9cc80(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056477a8fd000 CR3: 000000002b19e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: taprio_next_tc_txq net/sched/sch_taprio.c:774 [inline] taprio_dequeue_tc_priority+0x331/0x4b0 net/sched/sch_taprio.c:801 taprio_dequeue+0x12e/0x5f0 net/sched/sch_taprio.c:868 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1c4/0x19d0 net/sched/sch_generic.c:415 qdisc_run include/net/pkt_sched.h:125 [inline] qdisc_run include/net/pkt_sched.h:122 [inline] net_tx_action+0x71e/0xc80 net/core/dev.c:5049 __do_softirq+0x218/0x965 kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 e6 ea 31 f7 48 89 df e8 9e 63 32 f7 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 65 0c 24 f7 65 8b 05 56 2b ce 75 85 c0 74 12 5b RSP: 0018:ffffc9000bc3fc20 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffffffff922f0260 RCX: 1ffffffff1d56a39 RDX: 0000000000000000 RSI: ffffffff8a6c7700 RDI: ffffffff8ac806e0 RBP: 0000000000000286 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8eab8357 R11: 0000000000000000 R12: dffffc0000000000 R13: dead000000000122 R14: 0000000000000001 R15: 0000000000000001 __debug_check_no_obj_freed lib/debugobjects.c:1042 [inline] debug_check_no_obj_freed+0x245/0x4c0 lib/debugobjects.c:1063 slab_free_hook mm/slub.c:1767 [inline] slab_free_freelist_hook+0x182/0x1e0 mm/slub.c:1818 slab_free mm/slub.c:3801 [inline] kmem_cache_free+0xf0/0x490 mm/slub.c:3823 putname fs/namei.c:273 [inline] putname+0x101/0x140 fs/namei.c:259 vfs_fstatat+0x9a/0xb0 fs/stat.c:277 __do_sys_newfstatat+0x98/0x110 fs/stat.c:446 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f17651555f4 Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8 RSP: 002b:00007ffee135b258 EFLAGS: 00000206 ORIG_RAX: 0000000000000106 RAX: ffffffffffffffda RBX: 00007f176522d460 RCX: 00007f17651555f4 RDX: 00007ffee135b260 RSI: 00007f17651f2130 RDI: 0000000000000009 RBP: 000055c7afd60e10 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000003fff R14: 00007ffee135b7f8 R15: 000000000000000a