rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=151c/1/0x4000000000000000 softirq=498744/498746 fqs=20997
	(detected by 0, t=105002 jiffies, g=375437, q=6557 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23351 Comm: syz-executor Tainted: G    B              6.0.0-rc4-next-20220909 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:queued_spin_lock_slowpath+0x124/0xc80
Code: 00 00 00 65 48 2b 04 25 28 00 00 00 0f 85 cd 0a 00 00 48 81 c4 88 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 2e 29 3a 00 f3 90 <e9> 71 ff ff ff 44 8b 74 24 48 41 81 fe 00 01 00 00 0f 84 e5 00 00
RSP: 0018:ffff88804b4b79f8 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000009787b00 RCX: ffffffff84261b8d
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888009de2000
RBP: ffff888009de2000 R08: 0000000000000000 R09: ffff888009de2003
R10: ffffed10013bc400 R11: 0000000000000001 R12: 0000000000000003
R13: ffffed10013bc400 R14: 0000000000000001 R15: 1ffff11009696f40
FS:  0000555556aff400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc209d2a344 CR3: 0000000044ace000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_raw_spin_lock+0x1dc/0x260
 kmemleak_scan+0x21d/0x16f0
 kmemleak_write+0x570/0x680
 full_proxy_write+0x11d/0x190
 vfs_write+0x2cb/0xd90
 ksys_write+0x127/0x250
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8d63df95c3
Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007ffe19688988 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffe19688fc8 RCX: 00007f8d63df95c3
RDX: 0000000000000004 RSI: 00007f8d63eafed9 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000998 R09: 00007ffe19705080
R10: 00007ffe19705090 R11: 0000000000000246 R12: 00000000fffffff6
R13: 00007ffe1968aef1 R14: 0000000000000000 R15: 0000000000257d57
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 65 48             	add    %ah,0x48(%rbp)
   5:	2b 04 25 28 00 00 00 	sub    0x28,%eax
   c:	0f 85 cd 0a 00 00    	jne    0xadf
  12:	48 81 c4 88 00 00 00 	add    $0x88,%rsp
  19:	5b                   	pop    %rbx
  1a:	5d                   	pop    %rbp
  1b:	41 5c                	pop    %r12
  1d:	41 5d                	pop    %r13
  1f:	41 5e                	pop    %r14
  21:	41 5f                	pop    %r15
  23:	e9 2e 29 3a 00       	jmpq   0x3a2956
  28:	f3 90                	pause
* 2a:	e9 71 ff ff ff       	jmpq   0xffffffa0 <-- trapping instruction
  2f:	44 8b 74 24 48       	mov    0x48(%rsp),%r14d
  34:	41 81 fe 00 01 00 00 	cmp    $0x100,%r14d
  3b:	0f                   	.byte 0xf
  3c:	84 e5                	test   %ah,%ch