list_del corruption. prev->next should be ffff888123f2cf38, but was 0000000000000000. (prev=ffff8881259bab38)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:59!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 5348 Comm: syz-executor.1 Not tainted 6.1.0-rc1-syzkaller-12271-g9abf2313adc1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__list_del_entry_valid.cold+0x37/0x6f lib/list_debug.c:59
Code: fa ff 0f 0b 48 89 d1 48 c7 c7 50 c4 78 85 4c 89 c2 e8 9f 22 fa ff 0f 0b 48 89 f2 48 89 fe 48 c7 c7 00 c4 78 85 e8 8b 22 fa ff <0f> 0b 48 89 fe 48 89 ca 48 c7 c7 c8 c3 78 85 e8 77 22 fa ff 0f 0b
RSP: 0018:ffffc900094a3da0 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff888123f2cf18 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812cc638 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 6c65645f7473696c R12: ffffc900094a3df0
R13: ffffffff85e15dc0 R14: ffffffff8601a6d0 R15: 0000000000000000
FS:  00007f043df33700(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000055c000 CR3: 0000000125b19000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 unregister_shrinker mm/vmscan.c:747 [inline]
 unregister_shrinker+0x3e/0x100 mm/vmscan.c:741
 ops_exit_list+0x41/0x80 net/core/net_namespace.c:162
 setup_net+0x2c9/0x3f0 net/core/net_namespace.c:348
 copy_net_ns+0x1a0/0x3e0 net/core/net_namespace.c:471
 create_new_namespaces+0x199/0x4f0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x9b/0x120 kernel/nsproxy.c:226
 ksys_unshare+0x2fe/0x600 kernel/fork.c:3188
 __do_sys_unshare kernel/fork.c:3259 [inline]
 __se_sys_unshare kernel/fork.c:3257 [inline]
 __x64_sys_unshare+0x12/0x20 kernel/fork.c:3257
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x4645a9
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:00007f043df33198 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004645a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000005259a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055c0e0
R13: 00007f043df336bc R14: 00000000ffffffff R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid.cold+0x37/0x6f lib/list_debug.c:59
Code: fa ff 0f 0b 48 89 d1 48 c7 c7 50 c4 78 85 4c 89 c2 e8 9f 22 fa ff 0f 0b 48 89 f2 48 89 fe 48 c7 c7 00 c4 78 85 e8 8b 22 fa ff <0f> 0b 48 89 fe 48 89 ca 48 c7 c7 c8 c3 78 85 e8 77 22 fa ff 0f 0b
RSP: 0018:ffffc900094a3da0 EFLAGS: 00010286
RAX: 000000000000006d RBX: ffff888123f2cf18 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff812cc638 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 6c65645f7473696c R12: ffffc900094a3df0
R13: ffffffff85e15dc0 R14: ffffffff8601a6d0 R15: 0000000000000000
FS:  00007f043df33700(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcdf2481718 CR3: 0000000125b19000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400