rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2629 jiffies s: 177569 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1226 Comm: syz.0.7037 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__lock_acquire+0x232/0x7c40 kernel/locking/lockdep.c:4972
Code: aa aa aa 49 0f af d7 41 89 d7 4d 85 f6 4c 89 74 24 58 0f 84 3d 01 00 00 4b 8d 1c b6 41 83 fe 30 49 b8 00 00 00 00 00 fc ff df <0f> 87 11 65 00 00 48 8b 44 24 20 4c 8d b4 d8 d8 0a 00 00 4c 89 f0
RSP: 0018:ffffc90000006e80 EFLAGS: 00000083
RAX: ffffffff9049b100 RBX: 0000000000000019 RCX: ffffffff96c1a103
RDX: 000000000000004a RSI: 0000000000000000 RDI: ffffffff8cb47348
RBP: ffffc900000070b0 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1c422d6 R12: 0000000000000000
R13: ffffffff8cb47348 R14: 0000000000000005 R15: 000000000000004a
FS:  00007f0b7498d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000000 CR3: 000000005743e000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5676
 seqcount_lockdep_reader_access+0xcd/0x1d0 include/linux/seqlock.h:102
 ktime_get+0x31/0x270 kernel/time/timekeeping.c:846
 hrtimer_forward_now include/linux/hrtimer.h:509 [inline]
 perf_swevent_hrtimer+0x4f8/0x630 kernel/events/core.c:10982
 __run_hrtimer kernel/time/hrtimer.c:1751 [inline]
 __hrtimer_run_queues+0x4e7/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_interrupt+0x399/0x980 kernel/time/hrtimer.c:1877
 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+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755
Code: c7 44 29 fa 31 f6 e8 5c 5f 52 08 4d 89 ef 4d 89 f5 4c 8b 74 24 08 48 8b 54 24 48 41 0f b6 cc 48 89 df 48 89 ee e8 ed 39 00 00 <84> c0 0f 85 58 ff ff ff 49 8b 07 8b 4b 28 48 89 04 29 49 89 2f 49
RSP: 0018:ffffc900000078c0 EFLAGS: 00000296
RAX: 7d76c85c3edf8a01 RBX: ffff888017441c80 RCX: 7d76c85c3edf8a00
RDX: dffffc0000000000 RSI: ffffffff8a8c18a0 RDI: ffffffff8adf6420
RBP: ffff888029e48c00 R08: ffffffff90b13327 R09: 1ffffffff2162664
R10: dffffc0000000000 R11: fffffbfff2162665 R12: 0000000000000000
R13: ffffc90000007920 R14: 0000000000000000 R15: ffffc90000007928
 slab_free mm/slub.c:3687 [inline]
 __kmem_cache_free+0xb6/0x200 mm/slub.c:3700
 skb_free_head net/core/skbuff.c:762 [inline]
 skb_release_data+0x5e9/0x7e0 net/core/skbuff.c:791
 skb_release_all net/core/skbuff.c:856 [inline]
 __kfree_skb net/core/skbuff.c:870 [inline]
 consume_skb+0xa2/0x100 net/core/skbuff.c:1035
 netlink_broadcast+0xffd/0x10f0 net/netlink/af_netlink.c:1526
 hsr_prune_nodes+0x727/0xad0 net/hsr/hsr_framereg.c:557
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:in_lock_functions+0x0/0x20 kernel/locking/spinlock.c:412
Code: cd fe ff ff 48 c7 c1 c0 37 b5 92 80 e1 07 80 c1 03 38 c1 0f 8c 77 ff ff ff 48 c7 c7 c0 37 b5 92 e8 d5 42 6e 00 e9 66 ff ff ff <48> 81 ff 00 60 3b 8a 0f 93 c0 48 81 ff f2 89 3b 8a 0f 92 c1 20 c1
RSP: 0018:ffffc9000522f528 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff96c1a101
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000522f870 R08: ffffc9000522f81f R09: ffffc9000522f810
R10: dffffc0000000000 R11: fffff52000a45f04 R12: 000fffffffe00000
R13: 00007f0b72ab8000 R14: ffff888073e38000 R15: dffffc0000000000
 get_lock_parent_ip include/linux/ftrace.h:955 [inline]
 preempt_latency_start kernel/sched/core.c:5693 [inline]
 preempt_count_add+0x9a/0x190 kernel/sched/core.c:5718
 __raw_spin_lock include/linux/spinlock_api_smp.h:132 [inline]
 _raw_spin_lock+0xe/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 copy_pte_range mm/memory.c:1042 [inline]
 copy_pmd_range mm/memory.c:1177 [inline]
 copy_pud_range mm/memory.c:1214 [inline]
 copy_p4d_range mm/memory.c:1238 [inline]
 copy_page_range+0xfd8/0x3a60 mm/memory.c:1332
 dup_mmap kernel/fork.c:703 [inline]
 dup_mm kernel/fork.c:1552 [inline]
 copy_mm+0xeb0/0x1680 kernel/fork.c:1601
 copy_process+0x1952/0x4070 kernel/fork.c:2358
 kernel_clone+0x24b/0x900 kernel/fork.c:2765
 __do_sys_clone kernel/fork.c:2906 [inline]
 __se_sys_clone kernel/fork.c:2890 [inline]
 __x64_sys_clone+0x1a7/0x220 kernel/fork.c:2890
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0b73b9e159
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:00007f0b7498cfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f0b73e25fa0 RCX: 00007f0b73b9e159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000400
RBP: 00007f0b73c3503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f0b73e26038 R14: 00007f0b73e25fa0 R15: 00007ffc60640b68
 </TASK>