rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10500 ticks this GP) idle=f5fc/1/0x4000000000000000 softirq=9777/9777 fqs=5079 rcu: hardirqs softirqs csw/system rcu: number: 0 0 0 rcu: cputime: 227 52251 20 ==> 52480(ms) rcu: (t=10500 jiffies g=9873 q=712 ncpus=2) CPU: 0 PID: 5213 Comm: syz-executor343 Not tainted 6.5.0-rc2-syzkaller-00214-g284779dbf4e9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:207 Code: cd 48 7d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 80 b9 03 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 04 16 00 00 <85> c0 74 2b 8b 82 e0 15 00 00 83 f8 02 75 20 48 8b 8a e8 15 00 00 RSP: 0018:ffffc90000007bb8 EFLAGS: 00000206 RAX: 0000000000000000 RBX: 000000000abcc771 RCX: 0000000000000100 RDX: ffff88801f96bb80 RSI: ffffffff88587650 RDI: 0000000000000006 RBP: 0000068db8bac710 R08: 0000000000000006 R09: 0000000000000000 R10: 0000068db8bac710 R11: 0000000000094000 R12: 0000000000002710 R13: 0000000000000004 R14: 000000000112e0be R15: 0000000000000000 FS: 00005555558b5480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 000000005a030000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pie_calculate_probability+0x2a0/0x850 net/sched/sch_pie.c:345 fq_pie_timer+0x1da/0x4f0 net/sched/sch_fq_pie.c:387 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __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 ca 31 f7 48 89 df e8 9e 43 32 f7 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 65 ec 23 f7 65 8b 05 56 0b ce 75 85 c0 74 12 5b RSP: 0018:ffffc90003f4f180 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffffffff923957d0 RCX: 1ffffffff230a276 RDX: 0000000000000000 RSI: ffffffff8a6c7700 RDI: ffffffff8ac806e0 RBP: 0000000000000286 R08: 0000000000000001 R09: fffffbfff23095d1 R10: ffffffff9184ae8f R11: 0000000000071dfc R12: dffffc0000000000 R13: 0000000000016fc8 R14: 0000000000000000 R15: 0000000000000000 __debug_check_no_obj_freed lib/debugobjects.c:1042 [inline] debug_check_no_obj_freed+0x245/0x4c0 lib/debugobjects.c:1063 free_pages_prepare mm/page_alloc.c:1167 [inline] free_unref_page_prepare+0x1eb/0xb90 mm/page_alloc.c:2348 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443 vfree+0x181/0x7a0 mm/vmalloc.c:2842 kvfree+0x33/0x50 mm/util.c:648 __qdisc_destroy+0xc4/0x450 net/sched/sch_generic.c:1063 qdisc_put+0xd1/0xf0 net/sched/sch_generic.c:1090 notify_and_destroy net/sched/sch_api.c:1047 [inline] qdisc_graft+0x1122/0x1680 net/sched/sch_api.c:1144 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6424 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2549 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1914 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 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: 0033:0x7ffb8f3059d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 1f 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffddabba1d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ffb8f3059d9 RDX: 0000000000000000 RSI: 00000000200007c0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddabba208 R13: 00007ffddabba240 R14: 0000000000000013 R15: 431bde82d7b634db