------------[ cut here ]------------
WARNING: CPU: 0 PID: 6318 at kernel/rcu/tree_stall.h:989 rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:989
Modules linked in:
CPU: 0 UID: 0 PID: 6318 Comm: syz.2.139 Not tainted 6.15.0-syzkaller-gf66b4aaff254 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:989
Code: ff ff 48 c7 c7 20 44 ac 99 be 04 00 00 00 e8 63 79 7c 00 4c 89 f7 b8 01 00 00 00 87 05 65 8a 04 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 00 44 14 8e 74 47 48 c7 c0 30 33 a1 8f 48 c1 e8
RSP: 0018:ffffc90000007bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a02 RCX: ffffffff81a7b9ad
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e144400
RBP: ffffc90000007e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff3358884 R12: 0000000000002904
R13: 1ffff110170c7922 R14: ffffffff8e144400 R15: dffffc0000000000
FS:  00007f50e9ebf6c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000074cc4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 rcu_core+0x5f7/0x1710 kernel/rcu/tree.c:2827
 handle_softirqs+0x286/0x870 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:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x6ce/0xb60 kernel/locking/qspinlock.c:325
Code: ff ff 66 c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 0f b6 04 01 84 c0 75 46 80 3b 00 74 09 f3 90 <41> ff c6 75 d3 eb 4b 48 89 df be 02 00 00 00 e8 3e 85 bb f6 48 8d
RSP: 0018:ffffc9001a907980 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff888022c468c0 RCX: 1ffff11004588d18
RDX: ffffc9000c31b000 RSI: 000000000007ffff RDI: ffff8880b863c894
RBP: ffffc9001a907a98 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e
R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 1ffffffff1bf5318
R13: 0000000000000000 R14: 00000000ffff9bc9 R15: 1ffff11004588d18
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline]
 queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116
 spin_lock include/linux/spinlock.h:351 [inline]
 d_instantiate+0x64/0xa0 fs/dcache.c:1946
 alloc_path_pseudo fs/file_table.c:364 [inline]
 alloc_file_pseudo+0xf6/0x210 fs/file_table.c:376
 __anon_inode_getfile fs/anon_inodes.c:153 [inline]
 __anon_inode_getfd fs/anon_inodes.c:278 [inline]
 anon_inode_getfd+0xca/0x1b0 fs/anon_inodes.c:313
 map_create+0xdb6/0x1150 kernel/bpf/syscall.c:1541
 __sys_bpf+0x67e/0x860 kernel/bpf/syscall.c:5960
 __do_sys_bpf kernel/bpf/syscall.c:6085 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6083 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6083
 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: 0033:0x7f50e8f8e929
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:00007f50e9ebf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f50e91b5fa0 RCX: 00007f50e8f8e929
RDX: 0000000000000048 RSI: 00002000000009c0 RDI: 0000000000000000
RBP: 00007f50e9010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f50e91b5fa0 R15: 00007fff243cf218
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	66 c7 84 24 90 00 00 	movw   $0x100,0x90(%rsp)
   7:	00 00 01
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df
  14:	48 8b 4c 24 20       	mov    0x20(%rsp),%rcx
  19:	0f b6 04 01          	movzbl (%rcx,%rax,1),%eax
  1d:	84 c0                	test   %al,%al
  1f:	75 46                	jne    0x67
  21:	80 3b 00             	cmpb   $0x0,(%rbx)
  24:	74 09                	je     0x2f
  26:	f3 90                	pause
* 28:	41 ff c6             	inc    %r14d <-- trapping instruction
  2b:	75 d3                	jne    0x0
  2d:	eb 4b                	jmp    0x7a
  2f:	48 89 df             	mov    %rbx,%rdi
  32:	be 02 00 00 00       	mov    $0x2,%esi
  37:	e8 3e 85 bb f6       	call   0xf6bb857a
  3c:	48                   	rex.W
  3d:	8d                   	.byte 0x8d