list_add corruption. prev->next should be next (ffffffff8c083ac0), but was dead4ead00000000. (prev=ffff888043c735c8).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:30!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14086 Comm: syz-executor.2 Not tainted 6.0.0-syzkaller-02801-gfa182ea26ff0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 20 53 49 8a e8 19 ed f0 ff 0f 0b 48 89 f1 48 c7 c7 a0 52 49 8a 4c 89 e6 e8 05 ed f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 00 55 49 8a e8 f1 ec f0 ff 0f 0b
RSP: 0018:ffffc9000b20fc08 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff888046554780 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff8160f6f8 RDI: fffff52001641f73
RBP: ffff8880465547a0 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8c083ac0
R13: ffff8880465547a0 R14: ffff888046554000 R15: ffffffff8c79c360
FS:  00007ff1b9a9a700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f619ab81998 CR3: 00000000435d5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add include/linux/list.h:69 [inline]
 list_add_tail include/linux/list.h:102 [inline]
 register_shrinker_prepared+0x37/0x120 mm/vmscan.c:684
 sget_fc+0x5e7/0x7c0 fs/super.c:581
 vfs_get_super fs/super.c:1163 [inline]
 get_tree_nodev+0x24/0x1d0 fs/super.c:1198
 mqueue_get_tree+0xee/0x130 ipc/mqueue.c:435
 vfs_get_tree+0x89/0x2f0 fs/super.c:1530
 fc_mount+0x13/0xc0 fs/namespace.c:1043
 mq_create_mount ipc/mqueue.c:485 [inline]
 mq_init_ns+0x43e/0x630 ipc/mqueue.c:1701
 create_ipc_ns ipc/namespace.c:58 [inline]
 copy_ipcs+0x35e/0x5e0 ipc/namespace.c:94
 create_new_namespaces+0x210/0xb20 kernel/nsproxy.c:90
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
 ksys_unshare+0x445/0x920 kernel/fork.c:3181
 __do_sys_unshare kernel/fork.c:3252 [inline]
 __se_sys_unshare kernel/fork.c:3250 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3250
 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: 0033:0x7ff1b888b5a9
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff1b9a9a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ff1b89abf80 RCX: 00007ff1b888b5a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000
RBP: 00007ff1b88e6580 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6fc21f0f R14: 00007ff1b9a9a300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid.cold+0x56/0x58 lib/list_debug.c:30
Code: 0b 48 89 f2 4c 89 e1 48 89 ee 48 c7 c7 20 53 49 8a e8 19 ed f0 ff 0f 0b 48 89 f1 48 c7 c7 a0 52 49 8a 4c 89 e6 e8 05 ed f0 ff <0f> 0b 4c 89 e1 48 89 ee 48 c7 c7 00 55 49 8a e8 f1 ec f0 ff 0f 0b
RSP: 0018:ffffc9000b20fc08 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffff888046554780 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff8160f6f8 RDI: fffff52001641f73
RBP: ffff8880465547a0 R08: 0000000000000075 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8c083ac0
R13: ffff8880465547a0 R14: ffff888046554000 R15: ffffffff8c79c360
FS:  00007ff1b9a9a700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb23000 CR3: 00000000435d5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400