------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 0 PID: 12 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline]
WARNING: CPU: 0 PID: 12 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline]
WARNING: CPU: 0 PID: 12 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline]
WARNING: CPU: 0 PID: 12 at fs/buffer.c:1229 invalidate_bh_lru+0x102/0x1b0 fs/buffer.c:1511
Modules linked in:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-next-20241122-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
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: 44 ee da ff f0 ff 0b eb 25 e8 ba fa 6f ff 41 80 3c 2e 00 75 2a eb 30 e8 ac fa 6f ff 90 48 c7 c7 20 e1 18 8c e8 2f 99 30 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: 71bc11c585981000 RBX: ffff8880765d1318 RCX: ffff88801cac5a00
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81601b32 R09: 1ffff110170c519a
R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff8880b8639838
R13: 0000000000000000 R14: 1ffff110170c7307 R15: ffff8880b8639838
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6593dd90f8 CR3: 000000000e736000 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/0x1690 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:arch_stack_walk+0x4e/0x150 arch/x86/kernel/stacktrace.c:18
Code: 04 25 28 00 00 00 48 89 45 d0 48 c7 45 c8 00 00 00 00 48 c7 45 c0 00 00 00 00 48 c7 45 b8 00 00 00 00 48 c7 45 b0 00 00 00 00 <48> c7 45 a8 00 00 00 00 48 c7 45 a0 00 00 00 00 48 c7 45 98 00 00
RSP: 0018:ffffc900001171e0 EFLAGS: 00000282
RAX: 71bc11c585981000 RBX: ffffc900001172d0 RCX: 0000000000000000
RDX: ffff88801cac5a00 RSI: ffffc900001172c0 RDI: ffffffff818b3690
RBP: ffffc90000117270 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffc90000117370 R11: fffffbfff2851512 R12: ffff88801cac5a00
R13: ffffffff818b3690 R14: ffffc900001172c0 R15: 0000000000000000
 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2338 [inline]
 slab_free mm/slub.c:4598 [inline]
 kmem_cache_free+0x195/0x410 mm/slub.c:4700
 skb_kfree_head net/core/skbuff.c:1084 [inline]
 skb_free_head net/core/skbuff.c:1098 [inline]
 skb_release_data+0x677/0x8a0 net/core/skbuff.c:1125
 skb_release_all net/core/skbuff.c:1190 [inline]
 __kfree_skb net/core/skbuff.c:1204 [inline]
 consume_skb+0x9f/0xf0 net/core/skbuff.c:1436
 netlink_broadcast_filtered+0x116d/0x12a0 net/netlink/af_netlink.c:1532
 nlmsg_multicast_filtered include/net/netlink.h:1128 [inline]
 nlmsg_multicast include/net/netlink.h:1147 [inline]
 nlmsg_notify+0xfb/0x1c0 net/netlink/af_netlink.c:2584
 mpls_dev_notify+0x563/0x7a0 net/mpls/af_mpls.c:1641
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 unregister_netdevice_many_notify+0xedd/0x1da0 net/core/dev.c:11520
 cleanup_net+0x75d/0xcc0 net/core/net_namespace.c:627
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 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:	04 25                	add    $0x25,%al
   2:	28 00                	sub    %al,(%rax)
   4:	00 00                	add    %al,(%rax)
   6:	48 89 45 d0          	mov    %rax,-0x30(%rbp)
   a:	48 c7 45 c8 00 00 00 	movq   $0x0,-0x38(%rbp)
  11:	00
  12:	48 c7 45 c0 00 00 00 	movq   $0x0,-0x40(%rbp)
  19:	00
  1a:	48 c7 45 b8 00 00 00 	movq   $0x0,-0x48(%rbp)
  21:	00
  22:	48 c7 45 b0 00 00 00 	movq   $0x0,-0x50(%rbp)
  29:	00
* 2a:	48 c7 45 a8 00 00 00 	movq   $0x0,-0x58(%rbp) <-- trapping instruction
  31:	00
  32:	48 c7 45 a0 00 00 00 	movq   $0x0,-0x60(%rbp)
  39:	00
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	45 98                	rex.RB cwtl