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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#1: dhcpcd-run-hook/22927
Modules linked in:
CPU: 1 UID: 0 PID: 22927 Comm: dhcpcd-run-hook Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 20 25 49 9a be 04 00 00 00 e8 53 98 85 00 4c 89 f7 b8 01 00 00 00 87 05 e5 b5 9d 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 28 96 8e 74 47 48 c7 c0 c0 06 31 90 48 c1 e8
RSP: 0018:ffffc90000a08d98 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81ab6f2d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e962840
RBP: ffffc90000a08f18 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34924a4 R12: 0000000000002904
R13: dffffc0000000000 R14: ffffffff8e962840 R15: dffffc0000000000
FS:  00007fc1335b3c80(0000) GS:ffff888125387000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c28ba51048 CR3: 000000003a3f4000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rcu_core+0x3fe/0x1070 kernel/rcu/tree.c:2864
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:native_pause arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfcd/0x13d0 kernel/smp.c:892
Code: c0 75 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 7a 06 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 25 02 0c 00 eb 37 <f3> 90 43 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 0a
RSP: 0018:ffffc90003aaf560 EFLAGS: 00000293
RAX: ffffffff81b9c2b6 RBX: ffff8880b873c148 RCX: ffff888034ad5c40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003aaf688 R08: ffffffff9030d3f7 R09: 1ffffffff2061a7e
R10: dffffc0000000000 R11: fffffbfff2061a7f R12: 1ffff110170c8589
R13: dffffc0000000000 R14: ffff8880b8642c48 R15: 0000000000000000
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1057
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
 flush_tlb_mm_range+0x5c3/0x10b0 arch/x86/mm/tlb.c:1451
 dup_mmap+0x17a2/0x1d90 mm/mmap.c:1905
 dup_mm kernel/fork.c:1534 [inline]
 copy_mm+0x13b/0x4a0 kernel/fork.c:1586
 copy_process+0x1f1c/0x4440 kernel/fork.c:2264
 kernel_clone+0x284/0x8f0 kernel/fork.c:2721
 __do_sys_clone kernel/fork.c:2862 [inline]
 __se_sys_clone kernel/fork.c:2846 [inline]
 __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2846
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc13374d636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffdbd1bf2f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffdbd1bf2f8 RCX: 00007fc13374d636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 000055c28ba4fc30 R08: 0000000000000000 R09: 3c00000040001201
R10: 00007fc1335b3f50 R11: 0000000000000246 R12: 000055c28ba5d820
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	c0 75 79 45          	shlb   $0x45,0x79(%rbp)
   4:	8b 2e                	mov    (%rsi),%ebp
   6:	44 89 ee             	mov    %r13d,%esi
   9:	83 e6 01             	and    $0x1,%esi
   c:	31 ff                	xor    %edi,%edi
   e:	e8 7a 06 0c 00       	call   0xc068d
  13:	41 83 e5 01          	and    $0x1,%r13d
  17:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  1e:	fc ff df
  21:	75 07                	jne    0x2a
  23:	e8 25 02 0c 00       	call   0xc024d
  28:	eb 37                	jmp    0x61
* 2a:	f3 90                	pause <-- trapping instruction
  2c:	43 0f b6 04 2c       	movzbl (%r12,%r13,1),%eax
  31:	84 c0                	test   %al,%al
  33:	75 10                	jne    0x45
  35:	41 f7 06 01 00 00 00 	testl  $0x1,(%r14)
  3c:	74 1e                	je     0x5c
  3e:	e8                   	.byte 0xe8
  3f:	0a                   	.byte 0xa