WARNING: CPU: 2 PID: 26886 at fs/libfs.c:2117 stashed_dentry_prune+0x8f/0xb0 fs/libfs.c:2117
Modules linked in:

CPU: 2 PID: 26886 Comm: syz-executor.1 Not tainted 6.8.0-syzkaller-00648-g8ede842f669b #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:stashed_dentry_prune+0x8f/0xb0 fs/libfs.c:2117
Code: d9 88 ff be 08 00 00 00 48 89 ef e8 2b 74 e3 ff 48 89 d8 31 d2 f0 48 0f b1 55 00 5b 5d 41 5c e9 c7 d9 88 ff e8 c2 d9 88 ff 90 <0f> 0b 90 5b 5d 41 5c e9 b5 d9 88 ff e8 30 6c e3 ff eb 8c e8 29 6c
RSP: 0018:ffffc90020957790 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff8880586751a0 RCX: ffffc90003c8a000
RDX: 0000000000040000 RSI: ffffffff820319ee RDI: ffff888058675208
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000010 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888058675238 R14: ffff888058675280 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c400000(0063) knlGS:00000000f5ee8b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5ee7ffc CR3: 00000000655a8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __dentry_kill+0xb0/0x600 fs/dcache.c:594
 dput.part.0+0x4b1/0x9b0 fs/dcache.c:845
 dput+0x1f/0x30 fs/dcache.c:835
 prepare_anon_dentry fs/libfs.c:2018 [inline]
 path_from_stashed+0x9fc/0xd60 fs/libfs.c:2094
 ns_get_path_cb fs/nsfs.c:59 [inline]
 ns_get_path+0x87/0xc0 fs/nsfs.c:82
 proc_ns_get_link+0x122/0x270 fs/proc/namespaces.c:61
 pick_link fs/namei.c:1809 [inline]
 step_into+0x1aef/0x2230 fs/namei.c:1875
 open_last_lookups fs/namei.c:3590 [inline]
 path_openat+0x44a/0x29a0 fs/namei.c:3797
 do_filp_open+0x1de/0x440 fs/namei.c:3827
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_compat_sys_openat fs/open.c:1482 [inline]
 __se_compat_sys_openat fs/open.c:1480 [inline]
 __ia32_compat_sys_openat+0x16e/0x210 fs/open.c:1480
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x7c/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x33/0x80 arch/x86/entry/common.c:346
 entry_SYSENTER_compat_after_hwframe+0x7c/0x86
RIP: 0023:0xf72ee579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5ee84e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f5ee8530
RDX: 0000000000000002 RSI: 0000000000000000 RDI: 00000000f7444ff4
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	10 06                	adc    %al,(%rsi)
   2:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   6:	10 07                	adc    %al,(%rdi)
   8:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   c:	10 08                	adc    %cl,(%rax)
   e:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  1e:	00 51 52             	add    %dl,0x52(%rcx)
  21:	55                   	push   %rbp
  22:	89 e5                	mov    %esp,%ebp
  24:	0f 34                	sysenter
  26:	cd 80                	int    $0x80
* 28:	5d                   	pop    %rbp <-- trapping instruction
  29:	5a                   	pop    %rdx
  2a:	59                   	pop    %rcx
  2b:	c3                   	ret
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	90                   	nop
  2f:	90                   	nop
  30:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi
  37:	8d b4 26 00 00 00 00 	lea    0x0(%rsi,%riz,1),%esi