rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=a8f/1/0x4000000000000002 softirq=53316/53317 fqs=2099 
	(detected by 1, t=10503 jiffies, g=71241, q=2596)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17300 Comm: syz.8.3143 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:rcu_read_unlock_special+0xa/0x4a0 kernel/rcu/tree_plugin.h:625
Code: e1 07 80 c1 03 38 c1 7c 94 49 89 fd 4c 89 f7 e8 1c d0 58 00 4c 89 ef eb 84 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 <41> 54 53 48 83 e4 e0 48 81 ec a0 00 00 00 65 48 8b 04 25 28 00 00
RSP: 0018:ffffc90000007328 EFLAGS: 00000006
RAX: 0000000000000000 RBX: ffff888029a8dd7c RCX: ffff888029a8d940
RDX: 0000000000000100 RSI: ffffffff8a7a41e0 RDI: ffff888029a8d940
RBP: ffffc90000007340 R08: ffffffff8d8b0def R09: 1ffffffff1b161bd
R10: dffffc0000000000 R11: fffffbfff1b161be R12: 1ffff11005351baf
R13: 1ffff92000000e74 R14: ffff888029a8dd80 R15: dffffc0000000000
FS:  00007f53e73c66c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffecd946f88 CR3: 000000005f35f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 __perf_event_output kernel/events/core.c:7813 [inline]
 perf_event_output_forward+0x255/0x2e0 kernel/events/core.c:7822
 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515
 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 02 20 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000079c0 EFLAGS: 00000206
RAX: 4f830ca943aa2100 RBX: 1ffff92000000f3c RCX: 4f830ca943aa2100
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4200
RBP: ffffc90000007aa0 R08: ffffffff901ee1bf R09: 1ffffffff203dc37
R10: dffffc0000000000 R11: fffffbfff203dc38 R12: ffffffff8c323400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 hsr_announce+0x29a/0x310 net/hsr/hsr_device.c:410
 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
 expire_timers kernel/time/timer.c:1699 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:1970
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
 handle_softirqs+0x336/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:_compound_head include/linux/page-flags.h:-1 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:356 [inline]
RIP: 0010:kfree+0x8d/0x2a0 mm/slub.c:4560
Code: ff 49 89 c7 49 c1 ef 06 49 83 e7 c0 48 b9 00 00 00 00 00 ea ff ff 49 8b 44 0f 08 a8 01 0f 85 21 01 00 00 49 01 cf 49 8b 47 08 <4c> 89 f9 a8 01 0f 85 1a 01 00 00 48 83 39 ff 49 8b 47 08 0f 84 d0
RSP: 0018:ffffc90002f0f168 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff88807b86c000 RCX: ffffea0000000000
RDX: ffffc9000c929000 RSI: 000000000004d60e RDI: 000000000004d60f
RBP: dffffc0000000000 R08: ffff888060bd1fff R09: 1ffff1100c17a3ff
R10: dffffc0000000000 R11: ffffed100c17a400 R12: 1ffff1100498b720
R13: ffff88806176a000 R14: ffffffff818a60e5 R15: ffffea0001ee1a00
 free_func_state kernel/bpf/verifier.c:913 [inline]
 free_verifier_state+0xd5/0x230 kernel/bpf/verifier.c:930
 pop_stack+0x387/0x4f0 kernel/bpf/verifier.c:1032
 do_check+0x8d24/0xefc0 kernel/bpf/verifier.c:11492
 do_check_common+0xe7f/0x16e0 kernel/bpf/verifier.c:13516
 do_check_main kernel/bpf/verifier.c:13579 [inline]
 bpf_check+0x88c1/0xf6b0 kernel/bpf/verifier.c:14150
 bpf_prog_load+0xfdf/0x14e0 kernel/bpf/syscall.c:2354
 __sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657
 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f53e916e019
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:00007f53e73c6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f53e93f5fa0 RCX: 00007f53e916e019
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007f53e920500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f53e93f6038 R14: 00007f53e93f5fa0 R15: 00007ffd64227bf8
 </TASK>