syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2685 jiffies s: 3457 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4424 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:__remove_hrtimer kernel/time/hrtimer.c:1135 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1727 [inline]
RIP: 0010:__hrtimer_run_queues+0x36a/0xd60 kernel/time/hrtimer.c:1811
Code: 89 d0 48 c1 e8 03 48 89 84 24 d0 00 00 00 42 0f b6 04 28 84 c0 48 89 54 24 28 0f 85 87 04 00 00 44 0f b6 3a c6 02 00 44 89 fe <83> e6 01 31 ff e8 5c dc 0f 00 41 f6 c7 01 75 0a e8 f1 d9 0f 00 e9
RSP: 0018:ffffc900001e0d20 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff8880b8f2a748 RCX: ffff888079033b80
RDX: ffff88807d544378 RSI: 0000000000000001 RDI: ffffffff8adefcc0
RBP: ffffc900001e0e88 R08: dffffc0000000000 R09: fffffbfff1c3ecb6
R10: fffffbfff1c3ecb6 R11: 1ffffffff1c3ecb5 R12: ffff88807d544340
R13: dffffc0000000000 R14: ffff8880b8f2a580 R15: 0000000000000001
FS:  00005555693f2500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000300 CR3: 0000000029f59000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa5/0x100 kernel/locking/spinlock.c:194
Code: 74 05 e8 8e 80 65 f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 96 0b 36 f7 65 8b 05 97 c4 e0 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900033d6d20 EFLAGS: 00000206
RAX: 63262e1ec1db8000 RBX: 0000000000000a02 RCX: 63262e1ec1db8000
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: 0000000000000001
RBP: ffffc900033d6db0 R08: dffffc0000000000 R09: fffffbfff215c46b
R10: fffffbfff215c46b R11: 1ffffffff215c46a R12: dffffc0000000000
R13: 0000000000000a02 R14: ffff88807d5442e8 R15: 1ffff9200067ada4
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 taprio_change+0x4143/0x50f0 net/sched/sch_taprio.c:1689
 qdisc_create+0x7cb/0x1090 net/sched/sch_api.c:1315
 tc_modify_qdisc+0xb2f/0x1cc0 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x79b/0xed0 net/core/rtnetlink.c:6153
 netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2511
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x89e/0xbc0 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x59b/0x970 net/socket.c:2519
 ___sys_sendmsg+0x21c/0x290 net/socket.c:2573
 __sys_sendmsg net/socket.c:2602 [inline]
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5527d8eec9
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:00007fffb5159a88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5527fe5fa0 RCX: 00007f5527d8eec9
RDX: 0000000000000000 RSI: 00002000000007c0 RDI: 0000000000000004
RBP: 00007f5527e11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5527fe5fa0 R14: 00007f5527fe5fa0 R15: 0000000000000003
 </TASK>