rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-....: (3 ticks this GP) idle=5d0c/1/0x4000000000000000 softirq=409876/409876 fqs=43748
rcu: 	(detected by 0, t=105002 jiffies, g=404669, q=59650 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7751 Comm: syz-executor.0 Not tainted 6.3.0-next-20230505 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__rcu_read_unlock+0xc8/0x4f0
Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 76 01 00 00 8b 85 f8 03 00 00 85 c0 75 58 <65> 48 8b 1c 25 c0 8c 03 00 48 8d bb f4 03 00 00 48 b8 00 00 00 00
RSP: 0018:ffff88806cf099f0 EFLAGS: 00000202
RAX: 0000000000003c3e RBX: ffff88806cf3a480 RCX: ffffffff812ce8af
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff813738e1
RBP: ffffffff85616900 R08: 0000000000000001 R09: ffffffff87789a37
R10: fffffbfff0ef1346 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000200 R15: ffff88806cf34fc0
FS:  00007ff908e8e700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff908e6cff8 CR3: 000000000ed3a000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
 __is_insn_slot_addr+0x12f/0x290
 kernel_text_address+0x5b/0xc0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x59/0xa0
 arch_stack_walk+0x9d/0xf0
 stack_trace_save+0x90/0xd0
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 kasan_save_free_info+0x2e/0x50
 __kasan_slab_free+0x10a/0x190
 kmem_cache_free+0xff/0x4a0
 rcu_core+0x899/0x2750
 __do_softirq+0x1b7/0x7d4
 __irq_exit_rcu+0xcc/0x110
 irq_exit_rcu+0x9/0x20
 sysvec_apic_timer_interrupt+0x6e/0x90
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:unwind_next_frame+0xbd6/0x2310
Code: e9 6b f9 ff ff 48 89 c7 4c 89 44 24 18 48 89 44 24 10 e8 fd e8 6d 00 4c 8b 44 24 18 48 8b 44 24 10 e9 ad f8 ff ff 49 8d 76 f8 <ba> 08 00 00 00 4c 89 ff 4c 89 4c 24 20 4c 89 44 24 18 48 89 74 24
RSP: 0018:ffff888040d2f3e0 EFLAGS: 00000246
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff888040d2f798 RDI: ffffffff85def5fc
RBP: ffff888040d2f4a8 R08: ffffffff86126004 R09: ffffffff86126008
R10: 0000000000038001 R11: 0000000000020f1b R12: ffff888040d2f4b0
R13: ffff888040d2f498 R14: ffff888040d2f7a0 R15: ffff888040d2f450
 arch_stack_walk+0x87/0xf0
 stack_trace_save+0x90/0xd0
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc+0x172/0x390
 __create_object+0x3c/0xc90
 kmem_cache_alloc_bulk+0x3b4/0x6a0
 mas_alloc_nodes+0x337/0x890
 mas_node_count_gfp+0x106/0x140
 mas_expected_entries+0x117/0x210
 dup_mmap+0x3d9/0x1780
 copy_process+0x3e68/0x73b0
 kernel_clone+0xeb/0x7d0
 __do_sys_fork+0x80/0xc0
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7ff90b918b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff908e8e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039
RAX: ffffffffffffffda RBX: 00007ff90ba2bf60 RCX: 00007ff90b918b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ff90b972f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdbaf6d01f R14: 00007ff908e8e300 R15: 0000000000022000
 </TASK>
----------------
Code disassembly (best guess):
   0:	b8 00 00 00 00       	mov    $0x0,%eax
   5:	00 fc                	add    %bh,%ah
   7:	ff                   	(bad)
   8:	df 48 89             	fisttps -0x77(%rax)
   b:	fa                   	cli
   c:	48 c1 ea 03          	shr    $0x3,%rdx
  10:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  14:	84 c0                	test   %al,%al
  16:	74 08                	je     0x20
  18:	3c 03                	cmp    $0x3,%al
  1a:	0f 8e 76 01 00 00    	jle    0x196
  20:	8b 85 f8 03 00 00    	mov    0x3f8(%rbp),%eax
  26:	85 c0                	test   %eax,%eax
  28:	75 58                	jne    0x82
* 2a:	65 48 8b 1c 25 c0 8c 	mov    %gs:0x38cc0,%rbx <-- trapping instruction
  31:	03 00
  33:	48 8d bb f4 03 00 00 	lea    0x3f4(%rbx),%rdi
  3a:	48                   	rex.W
  3b:	b8 00 00 00 00       	mov    $0x0,%eax