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WARNING: CPU: 0 PID: 6108 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: 6108 Comm: syz.2.60 Not tainted 6.15.0-syzkaller-g4d2815a1cc3d #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 34 ac 99 be 04 00 00 00 e8 03 2b 7c 00 4c 89 f7 b8 01 00 00 00 87 05 65 7a 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 35 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: fffffbfff3358684 R12: 0000000000002904
R13: 1ffff110170c7922 R14: ffffffff8e144400 R15: dffffc0000000000
FS:  00007fa0bb0346c0(0000) GS:ffff888125c55000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3040eff8 CR3: 000000003161c000 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:trylock_clear_pending kernel/locking/qspinlock_paravirt.h:122 [inline]
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:431 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x6a6/0xb60 kernel/locking/qspinlock.c:325
Code: 8b 44 24 40 42 0f b6 04 30 84 c0 0f 85 42 01 00 00 c6 07 00 43 0f b6 04 37 84 c0 0f 85 60 01 00 00 c6 01 01 41 be 00 80 ff ff <66> c7 84 24 90 00 00 00 00 01 48 b8 00 00 00 00 00 fc ff df 48 8b
RSP: 0018:ffffc90003dff820 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff888148c772d0 RCX: 1ffff1102918ee5a
RDX: ffffc9000c50a000 RSI: 000000000007ffff RDI: ffff8880b863c894
RBP: ffffc90003dff938 R08: ffffffff8fa103f7 R09: 1ffffffff1f4207e
R10: dffffc0000000000 R11: fffffbfff1f4207f R12: 1ffffffff1bf5318
R13: 0000000000000000 R14: 00000000ffffef77 R15: 1ffff1102918ee5a
 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
 bpf_prog_load+0x1465/0x1930 kernel/bpf/syscall.c:3002
 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5853
 __do_sys_bpf kernel/bpf/syscall.c:5960 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5958 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5958
 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: 0033:0x7fa0ba18e929
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:00007fa0bb034038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fa0ba3b5fa0 RCX: 00007fa0ba18e929
RDX: 0000000000000048 RSI: 0000200000000200 RDI: 0000000000000005
RBP: 00007fa0ba210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa0ba3b5fa0 R15: 00007fff3066c818
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 44 24 40          	mov    0x40(%rsp),%eax
   4:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax
   9:	84 c0                	test   %al,%al
   b:	0f 85 42 01 00 00    	jne    0x153
  11:	c6 07 00             	movb   $0x0,(%rdi)
  14:	43 0f b6 04 37       	movzbl (%r15,%r14,1),%eax
  19:	84 c0                	test   %al,%al
  1b:	0f 85 60 01 00 00    	jne    0x181
  21:	c6 01 01             	movb   $0x1,(%rcx)
  24:	41 be 00 80 ff ff    	mov    $0xffff8000,%r14d
* 2a:	66 c7 84 24 90 00 00 	movw   $0x100,0x90(%rsp) <-- trapping instruction
  31:	00 00 01
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b