------------[ cut here ]------------
WARNING: CPU: 0 PID: 7639 at kernel/rcu/tree_stall.h:1001 rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:993
Modules linked in:
CPU: 0 PID: 7639 Comm: syz.5.332 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:rcu_check_gp_start_stall+0x2dc/0x460 kernel/rcu/tree_stall.h:1001
Code: ff ff ff 48 c7 c7 a0 c4 ee 96 be 04 00 00 00 e8 2a a8 6c 00 48 89 df b8 01 00 00 00 87 05 4c 8f 7e 15 85 c0 0f 85 19 ff ff ff <0f> 0b 48 81 ff 00 54 d3 8c 74 47 48 c7 c0 9c b9 4a 8e 48 c1 e8 03
RSP: 0018:ffffc90000007bb8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff8cd35400 RCX: ffffffff81703546
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8cd35400
RBP: ffffc90000007e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff2ddd894 R12: 0000000000002904
R13: 1ffff110171c7a6a R14: 0000000000000a02 R15: dffffc0000000000
FS:  00007f86023ac6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002339d000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 rcu_core+0x612/0x1720 kernel/rcu/tree.c:2462
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1385
Code: 0f 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 02 52 0f 09 66 90 41 57 41 56 53 eb 11 e8 54 fa 18 09 e8 0f 33 2e 00 fb 5b <41> 5e 41 5f c3 f3 0f 1e fa 49 be 00 00 00 00 00 fc ff df 49 89 ff
RSP: 0018:ffffc900037e78e8 EFLAGS: 00000282
RAX: ea4e529520ecb100 RBX: ffff8880b8e3d188 RCX: ea4e529520ecb100
RDX: dffffc0000000000 RSI: ffffffff8aaaba40 RDI: ffffffff8afc6780
RBP: ffffc900037e7ae8 R08: ffffffff8e4a84ef R09: 1ffffffff1c9509d
R10: dffffc0000000000 R11: fffffbfff1c9509e R12: dffffc0000000000
R13: ffff8880b8e3c440 R14: dffffc0000000000 R15: ffff8880b8e3d188
 __schedule+0x171e/0x44d0 kernel/sched/core.c:6704
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 futex_wait_queue+0x138/0x1b0 kernel/futex/waitwake.c:355
 futex_wait+0x19f/0x530 kernel/futex/waitwake.c:656
 do_futex+0x2ff/0x3e0 kernel/futex/syscalls.c:106
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex+0x36f/0x3f0 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f860158ebe9
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:00007f86023ac0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f86017b5fa8 RCX: 00007f860158ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f86017b5fa8
RBP: 00007f86017b5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f86017b6038 R14: 00007fffb0060230 R15: 00007fffb0060318
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f 48 8d 65 d8 5b 41 	cmovs  0x415bd865(%rbp),%ecx
   7:	5c                   	pop    %rsp
   8:	41 5d                	pop    %r13
   a:	41 5e                	pop    %r14
   c:	41 5f                	pop    %r15
   e:	5d                   	pop    %rbp
   f:	c3                   	ret
  10:	e8 02 52 0f 09       	call   0x90f5217
  15:	66 90                	xchg   %ax,%ax
  17:	41 57                	push   %r15
  19:	41 56                	push   %r14
  1b:	53                   	push   %rbx
  1c:	eb 11                	jmp    0x2f
  1e:	e8 54 fa 18 09       	call   0x918fa77
  23:	e8 0f 33 2e 00       	call   0x2e3337
  28:	fb                   	sti
  29:	5b                   	pop    %rbx
* 2a:	41 5e                	pop    %r14 <-- trapping instruction
  2c:	41 5f                	pop    %r15
  2e:	c3                   	ret
  2f:	f3 0f 1e fa          	endbr64
  33:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  3a:	fc ff df
  3d:	49 89 ff             	mov    %rdi,%r15