------------[ cut here ]------------
WARNING: CPU: 1 PID: 6215 at kernel/rcu/tree_stall.h:1050 rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1050
Modules linked in:
CPU: 1 UID: 0 PID: 6215 Comm: syz.4.79 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1050
Code: ff ff 48 c7 c7 20 c4 af 99 be 04 00 00 00 e8 43 30 7c 00 4c 89 f7 b8 01 00 00 00 87 05 35 d0 08 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff c0 f1 13 8e 74 47 48 c7 c0 70 b1 a3 8f 48 c1 e8
RSP: 0018:ffffc90000a08bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a6f3dd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e13f1c0
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff335f884 R12: 0000000000002904
R13: 1ffff110170e75f2 R14: ffffffff8e13f1c0 R15: dffffc0000000000
FS:  00007fdfcbe7d6c0(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000005000 CR3: 000000006d300000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_core+0x5fa/0x1770 kernel/rcu/tree.c:2856
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:in_lock_functions+0x0/0x30 kernel/locking/spinlock.c:408
Code: c7 b8 07 a8 95 e8 30 36 85 00 e9 61 ff ff ff cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 81 ff e0 d9 7b 8b 0f 93 c0 48 81 ff 74 1f 7c 8b 0f
RSP: 0018:ffffc900056f7000 EFLAGS: 00010246
RAX: 0000000000000001 RBX: ffffffff8b7a71a7 RCX: 0000000000000000
RDX: ffffc9000d15a000 RSI: 0000000000002a55 RDI: ffffffff8b7a71a7
RBP: ffffc900056f70b0 R08: ffffc900056f6f2f R09: 0000000000000000
R10: ffffc900056f6f20 R11: ffffffffa02019d4 R12: 0000000000000002
R13: ffffffff8e139ea0 R14: dffffc0000000000 R15: 1ffff92000adee04
 get_lock_parent_ip include/linux/ftrace.h:1091 [inline]
 preempt_latency_start+0x20/0x70 kernel/sched/core.c:5807
 preempt_schedule_notrace+0xc7/0x110 kernel/sched/core.c:7231
 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13
 class_preempt_notrace_destructor include/linux/preempt.h:473 [inline]
 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline]
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x347/0x360 kernel/locking/lockdep.c:5831
 rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 rcu_read_lock include/linux/rcupdate.h:841 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 save_stack+0xf5/0x1f0 mm/page_owner.c:156
 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895
 free_large_kmalloc+0x13a/0x1f0 mm/slub.c:4805
 bpf_check+0x16552/0x1d2e0 kernel/bpf/verifier.c:24857
 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2979
 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029
 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6137 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdfcaf8ebe9
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:00007fdfcbe7d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fdfcb1b5fa0 RCX: 00007fdfcaf8ebe9
RDX: 0000000000000048 RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007fdfcb011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdfcb1b6038 R14: 00007fdfcb1b5fa0 R15: 00007ffc1b53d6e8
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	b8 07 a8 95 e8       	mov    $0xe895a807,%eax
   5:	30 36                	xor    %dh,(%rsi)
   7:	85 00                	test   %eax,(%rax)
   9:	e9 61 ff ff ff       	jmp    0xffffff6f
   e:	cc                   	int3
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
  16:	cc                   	int3
  17:	cc                   	int3
  18:	cc                   	int3
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	90                   	nop
  24:	90                   	nop
  25:	90                   	nop
  26:	90                   	nop
  27:	90                   	nop
  28:	90                   	nop
* 29:	f3 0f 1e fa          	endbr64 <-- trapping instruction
  2d:	48 81 ff e0 d9 7b 8b 	cmp    $0xffffffff8b7bd9e0,%rdi
  34:	0f 93 c0             	setae  %al
  37:	48 81 ff 74 1f 7c 8b 	cmp    $0xffffffff8b7c1f74,%rdi
  3e:	0f                   	.byte 0xf