rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2716 jiffies s: 155565 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: 30992 Comm: syz.5.5951 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0xdd/0x4a0 kernel/locking/lockdep.c:5761
Code: 0d 0f 83 a3 01 00 00 45 89 f5 41 c1 ee 06 4a 8d 3c f5 28 d2 00 8f be 08 00 00 00 e8 0d a4 6f 00 4c 0f a3 2d 2d d2 9c 0d 73 0d <e8> 2e 3c 08 00 84 c0 0f 84 2f 02 00 00 48 c7 c0 e4 06 01 8f 48 c1
RSP: 0018:ffffc900001dff40 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8163fff3
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f00d228
RBP: ffffc900001e0048 R08: ffffffff8f00d22f R09: 1ffffffff1e01a45
R10: dffffc0000000000 R11: fffffbfff1e01a46 R12: 1ffff9200003bff4
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007fe14f0646c0(0000) GS:ffff8880b8d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f643e2dfe9c CR3: 000000004a440000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000680
DR3: 0000200000000680 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 trace_call_bpf+0xe0/0x6b0 kernel/trace/bpf_trace.c:134
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10037
 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14
 trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
 trace_hardirqs_off_finish+0x13f/0x180 kernel/trace/trace_preemptirq.c:67
 irqentry_enter+0x33/0x50 kernel/entry/common.c:385
 sysvec_apic_timer_interrupt+0xa/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:169 [inline]
RIP: 0010:unwind_next_frame+0x1a7/0x1fd0 arch/x86/kernel/unwind_orc.c:448
Code: 39 f8 0f 86 b0 16 00 00 44 89 f8 4c 8d 24 85 64 0a 20 90 4c 89 e0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 23 18 00 00 45 8b 24 24 <44> 89 f8 ff c0 4c 8d 2c 85 64 0a 20 90 4c 89 e8 48 c1 e8 03 0f b6
RSP: 0018:ffffc900001e03a0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900001e0448 RCX: ffffffff97a3b100
RDX: dffffc0000000000 RSI: 000000000009607a RDI: 0000000000000001
RBP: dffffc0000000000 R08: ffffc900001e0510 R09: 0000000000000005
R10: dffffc0000000000 R11: fffff5200003c095 R12: 000000000019fe18
R13: ffffc900001e08e0 R14: ffffffff8a127041 R15: 0000000000091270
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x490 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x18b/0x2f0 mm/slub.c:3383
 skb_clone+0x1e7/0x370 net/core/skbuff.c:1663
 hsr_forward_do net/hsr/hsr_forward.c:-1 [inline]
 hsr_forward_skb+0x1162/0x2340 net/hsr/hsr_forward.c:693
 send_hsr_supervision_frame+0x6b9/0xd00 net/hsr/hsr_device.c:366
 hsr_announce+0x194/0x340 net/hsr/hsr_device.c:422
 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:finish_task_switch+0x267/0x8e0 kernel/sched/core.c:5125
Code: da 08 85 c0 0f 84 38 01 00 00 48 85 db 0f 85 57 01 00 00 0f 1f 44 00 00 4c 89 e7 e8 d3 82 e4 08 e8 be 2b 2f 00 fb 4c 8b 65 b8 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0
RSP: 0018:ffffc9000d65f4e0 EFLAGS: 00000282
RAX: a91c7420a6c38b00 RBX: 0000000000000000 RCX: a91c7420a6c38b00
RDX: dffffc0000000000 RSI: ffffffff8a8c19a0 RDI: ffffffff8adf7160
RBP: ffffc9000d65f530 R08: ffff8880b8d357cb R09: 1ffff110171a6af9
R10: dffffc0000000000 R11: ffffed10171a6afa R12: ffff888070691e00
R13: 1ffff110171a76f2 R14: dffffc0000000000 R15: ffff8880b8d3b790
 context_switch kernel/sched/core.c:5249 [inline]
 __schedule+0x1087/0x4030 kernel/sched/core.c:6563
 schedule+0xb9/0x180 kernel/sched/core.c:6639
 schedule_timeout+0xbd/0x2d0 kernel/time/timer.c:2144
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common+0x3de/0x6f0 kernel/sched/completion.c:106
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion_state+0x18/0x30 kernel/sched/completion.c:254
 call_usermodehelper_exec+0x3db/0x4a0 kernel/umh.c:445
 call_modprobe kernel/kmod.c:98 [inline]
 __request_module+0x427/0xa00 kernel/kmod.c:170
 dev_ioctl+0x548/0xe80 net/core/dev_ioctl.c:570
 sock_do_ioctl+0x245/0x320 net/socket.c:1216
 sock_ioctl+0x48a/0x700 net/socket.c:1321
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
 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: 0033:0x7fe14e19e559
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:00007fe14f064028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe14e425fa0 RCX: 00007fe14e19e559
RDX: 0000200000000680 RSI: 0000000000008931 RDI: 0000000000000006
RBP: 00007fe14e235ab8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe14e426038 R14: 00007fe14e425fa0 R15: 00007ffca8654ba8
 </TASK>