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WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#0: syz.3.2612/15654
Modules linked in:
CPU: 0 UID: 0 PID: 15654 Comm: syz.3.2612 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 a0 45 02 9a be 04 00 00 00 e8 33 8d 82 00 4c 89 f7 b8 01 00 00 00 87 05 05 09 58 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 00 05 56 8e 74 47 48 c7 c0 c0 4d ef 8f 48 c1 e8
RSP: 0018:ffffc90000007d98 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81aa3c8d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e560500
RBP: ffffc90000007f30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34048b4 R12: 0000000000002904
R13: 1ffff110170c771a R14: ffffffff8e560500 R15: dffffc0000000000
FS:  00007f86389736c0(0000) GS:ffff8881256f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000004e000 CR3: 0000000032508000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rcu_core+0x5f1/0x1750 kernel/rcu/tree.c:2852
 handle_softirqs+0x22a/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: 8b 3d c4 3e 33 0c 48 89 de 5b e9 73 c5 5c 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d a8 38 2e 11 65 8b 15 c9 38 2e 11 81 e2 00 01 ff 00 74
RSP: 0018:ffffc9000e8c7850 EFLAGS: 00000246
RAX: ffffffff8b91c392 RBX: ffff888079b90708 RCX: 0000000000080000
RDX: ffffc9000e022000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 1ffff1100f3720e2 R08: ffff88802ab55b9b R09: 1ffff1100556ab73
R10: dffffc0000000000 R11: ffffed100556ab74 R12: 1ffff1100f3720e1
R13: dffffc0000000000 R14: ffff888079b90708 R15: ffff888079b90710
 plist_check_prev_next lib/plist.c:35 [inline]
 plist_check_list+0x2e2/0x310 lib/plist.c:48
 plist_check_head lib/plist.c:60 [inline]
 plist_add+0x66/0x540 lib/plist.c:78
 __futex_queue+0xed/0x160 kernel/futex/core.c:907
 futex_queue kernel/futex/futex.h:315 [inline]
 futex_wait_setup+0x3f8/0x560 kernel/futex/waitwake.c:660
 __futex_wait+0x173/0x420 kernel/futex/waitwake.c:682
 futex_wait+0x119/0x380 kernel/futex/waitwake.c:715
 do_futex+0x333/0x420 kernel/futex/syscalls.c:130
 __do_sys_futex kernel/futex/syscalls.c:207 [inline]
 __se_sys_futex+0x3a8/0x450 kernel/futex/syscalls.c:188
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8637b9aeb9
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:00007f86389730e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f8637e16098 RCX: 00007f8637b9aeb9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8637e16098
RBP: 00007f8637e16090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8637e16128 R14: 00007ffd4e8d9500 R15: 00007ffd4e8d95e8
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 3d c4 3e 33 0c    	mov    0xc333ec4(%rip),%edi        # 0xc333eca
   6:	48 89 de             	mov    %rbx,%rsi
   9:	5b                   	pop    %rbx
   a:	e9 73 c5 5c 00       	jmp    0x5cc582
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  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:	f3 0f 1e fa          	endbr64
  26:	48 8b 04 24          	mov    (%rsp),%rax
* 2a:	65 48 8b 0d a8 38 2e 	mov    %gs:0x112e38a8(%rip),%rcx        # 0x112e38da <-- trapping instruction
  31:	11
  32:	65 8b 15 c9 38 2e 11 	mov    %gs:0x112e38c9(%rip),%edx        # 0x112e3902
  39:	81 e2 00 01 ff 00    	and    $0xff0100,%edx
  3f:	74                   	.byte 0x74