------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 63 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline]
WARNING: CPU: 0 PID: 63 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline]
WARNING: CPU: 0 PID: 63 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline]
WARNING: CPU: 0 PID: 63 at fs/buffer.c:1229 invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1511
Modules linked in:
CPU: 0 UID: 0 PID: 63 Comm: kworker/u8:5 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: netns cleanup_net
RIP: 0010:__brelse fs/buffer.c:1229 [inline]
RIP: 0010:brelse include/linux/buffer_head.h:324 [inline]
RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1498 [inline]
RIP: 0010:invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1511
Code: 14 12 dc ff f0 ff 0b eb 25 e8 fa b5 75 ff 41 80 3c 2e 00 75 2a eb 30 e8 ec b5 75 ff 90 48 c7 c7 e0 ea 18 8c e8 ff 64 36 ff 90 <0f> 0b 90 90 48 bd 00 00 00 00 00 fc ff df 41 80 3c 2e 00 74 08 4c
RSP: 0018:ffffc90000007f30 EFLAGS: 00010046
RAX: a4e87c46a327b500 RBX: ffff88807794a060 RCX: ffff88801c760000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81600dd2 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff8880b86398d8
R13: 0000000000000000 R14: 1ffff110170c731b R15: ffff8880b86398d8
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efe53da9130 CR3: 000000007adca000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 csd_do_func kernel/smp.c:134 [inline]
 __flush_smp_call_function_queue+0x3fc/0x1620 kernel/smp.c:540
 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709
RIP: 0010:call_rcu+0x7a6/0xa70 kernel/rcu/tree.c:3191
Code: 3c 03 00 74 08 4c 89 ff e8 d7 9d 80 00 f6 84 24 81 00 00 00 02 75 5d 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <48> b8 00 00 00 00 00 fc ff df 4a c7 04 28 00 00 00 00 66 42 c7 44
RSP: 0018:ffffc9000214f4e0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000429eac RCX: ffffffff817b0afa
RDX: dffffc0000000000 RSI: ffffffff8c0a9240 RDI: ffffffff8c5fbe80
RBP: ffffc9000214f5f8 R08: ffffffff942b284f R09: 1ffffffff2856509
R10: dffffc0000000000 R11: fffffbfff285650a R12: 1ffff110170c7f45
R13: 1ffff92000429ea8 R14: 0000000000000246 R15: ffffc9000214f560
 kernfs_put+0x1dc/0x370 fs/kernfs/dir.c:578
 kernfs_remove_by_name_ns+0xe4/0x160 fs/kernfs/dir.c:1695
 kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfe/0x2c0 fs/sysfs/group.c:322
 sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:346
 device_remove_groups drivers/base/core.c:2819 [inline]
 device_remove_attrs+0x23a/0x290 drivers/base/core.c:2955
 device_del+0x572/0x9b0 drivers/base/core.c:3853
 unregister_netdevice_many_notify+0x1859/0x1da0 net/core/dev.c:11562
 cleanup_net+0x75d/0xcc0 net/core/net_namespace.c:627
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
----------------
Code disassembly (best guess):
   0:	3c 03                	cmp    $0x3,%al
   2:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   6:	89 ff                	mov    %edi,%edi
   8:	e8 d7 9d 80 00       	call   0x809de4
   d:	f6 84 24 81 00 00 00 	testb  $0x2,0x81(%rsp)
  14:	02
  15:	75 5d                	jne    0x74
  17:	41 f7 c6 00 02 00 00 	test   $0x200,%r14d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	48 c7 44 24 60 0e 36 	movq   $0x45e0360e,0x60(%rsp)
  28:	e0 45
* 2a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax <-- trapping instruction
  31:	fc ff df
  34:	4a c7 04 28 00 00 00 	movq   $0x0,(%rax,%r13,1)
  3b:	00
  3c:	66                   	data16
  3d:	42                   	rex.X
  3e:	c7                   	.byte 0xc7
  3f:	44                   	rex.R