slab mnt_cache start ffff88801dab7340 pointer offset 184 size 352
list_add corruption. next->prev should be prev (ffff888028b59e78), but was ffff88801dab73f8. (next=ffff88801dab73f8).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:31!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 23422 Comm: syz.5.15105 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: d4 68 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 53 9d 89 fd 48 8b 53 08 48 c7 c7 60 17 86 8b 4c 89 f6 48 89 d9 e8 6d ca 88 fc 90 <0f> 0b 4c 89 f7 e8 d2 d3 68 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 23
RSP: 0018:ffffc9000db27b28 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801dab73f8 RCX: 329ed193a6415600
RDX: ffffc9001dbc1000 RSI: 0000000000000c0b RDI: 0000000000000c0c
RBP: 1ffff11003b56e80 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124923 R12: ffff88801dab7400
R13: dffffc0000000000 R14: ffff888028b59e78 R15: ffff888028b59238
FS:  00007f4c285966c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001e6030 CR3: 0000000033600000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000009000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_add_valid include/linux/list.h:96 [inline]
 __list_add include/linux/list.h:158 [inline]
 list_add include/linux/list.h:177 [inline]
 clone_mnt+0x447/0x9a0 fs/namespace.c:1275
 copy_tree+0xde/0x930 fs/namespace.c:2159
 copy_mnt_ns+0x24d/0x990 fs/namespace.c:4246
 create_new_namespaces+0xcf/0x6a0 kernel/nsproxy.c:98
 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:226
 ksys_unshare+0x4f4/0x900 kernel/fork.c:3174
 __do_sys_unshare kernel/fork.c:3245 [inline]
 __se_sys_unshare kernel/fork.c:3243 [inline]
 __x64_sys_unshare+0x38/0x50 kernel/fork.c:3243
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c2a33bf79
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4c28596028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f4c2a5b5fa0 RCX: 00007f4c2a33bf79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000022020600
RBP: 00007f4c2a3d27e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4c2a5b6038 R14: 00007f4c2a5b5fa0 R15: 00007ffeb54b7368
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_add_valid_or_report+0xf4/0x130 lib/list_debug.c:29
Code: d4 68 fd 42 80 7c 2d 00 00 74 08 4c 89 e7 e8 53 9d 89 fd 48 8b 53 08 48 c7 c7 60 17 86 8b 4c 89 f6 48 89 d9 e8 6d ca 88 fc 90 <0f> 0b 4c 89 f7 e8 d2 d3 68 fd 43 80 3c 2c 00 74 08 4c 89 f7 e8 23
RSP: 0018:ffffc9000db27b28 EFLAGS: 00010246
RAX: 0000000000000075 RBX: ffff88801dab73f8 RCX: 329ed193a6415600
RDX: ffffc9001dbc1000 RSI: 0000000000000c0b RDI: 0000000000000c0c
RBP: 1ffff11003b56e80 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017124923 R12: ffff88801dab7400
R13: dffffc0000000000 R14: ffff888028b59e78 R15: ffff888028b59238
FS:  00007f4c285966c0(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001e6030 CR3: 0000000033600000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000009000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400