[syzbot ci] Re: vsock: add G2H fallback for CIDs not owned by H2G transport

[syzbot ci]

syzbot ci has tested the following series

[v2] vsock: add G2H fallback for CIDs not owned by H2G transport
https://lore.kernel.org/all/20260302194926.90378-1-graf@xxxxxxxxxx
* [PATCH v2] vsock: add G2H fallback for CIDs not owned by H2G transport

and found the following issue:
WARNING in register_net_sysctl_sz

Full report is available here:
https://ci.syzbot.org/series/8be7b007-32ae-447a-bb92-b169bb844054

***

WARNING in register_net_sysctl_sz

tree:      net-next
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net-next.git
base:      01857fc712f6469cab9cc578120cdc80f1c2a634
arch:      amd64
compiler:  Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
config:    https://ci.syzbot.org/builds/5374f01b-dc57-486a-a2a6-2fb66c003b70/config

------------[ cut here ]------------
sysctl net/vsock/g2h_fallback: data points to kernel global data: vsock_g2h_fallback
WARNING: net/sysctl_net.c:156 at register_net_sysctl_sz+0x163/0x440, CPU#0: syz-executor/5808
Modules linked in:
CPU: 0 UID: 0 PID: 5808 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:register_net_sysctl_sz+0x1ad/0x440
Code: 00 00 00 fc ff df 41 80 3c 06 00 74 08 4c 89 ef e8 88 36 c8 f6 4d 8b 44 24 f0 48 89 df 48 8b 74 24 10 4c 89 fa 48 8b 4c 24 18 <67> 48 0f b9 3a 49 bf 00 00 00 00 00 fc ff df 42 0f b6 44 3d 00 84
RSP: 0018:ffffc90005357ab0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffff90234820 RCX: ffffffff8d01a100
RDX: ffffffff8d05e680 RSI: ffffffff8d05e620 RDI: ffffffff90234820
RBP: 1ffff110212d6810 R08: ffffffff8ff4f0c0 R09: ffffffff8e7602e0
R10: 0000012400000008 R11: ffffffff9a79ce5c R12: ffff8881096b4088
R13: ffff8881096b4078 R14: 1ffff110212d680f R15: ffffffff8d05e680
FS:  000055556a136500(0000) GS:ffff88818de66000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0c19e52af8 CR3: 0000000112a0e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 vsock_sysctl_init_net+0x13f/0x2f0
 ops_init+0x35c/0x5c0
 setup_net+0x118/0x340
 copy_net_ns+0x50e/0x730
 create_new_namespaces+0x3e7/0x6a0
 unshare_nsproxy_namespaces+0x11a/0x160
 ksys_unshare+0x51d/0x930
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd97459da67
Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 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:00007fffee0fc138 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd97459da67
RDX: 00007fd97459c799 RSI: 00007fffee0fc100 RDI: 0000000040000000
RBP: 00007fffee0fc190 R08: 00007fd9747d9610 R09: 00007fd9747d9610
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffee0fc198
R13: 0000000000000002 R14: 00007fffee0fc378 R15: 0000000000000000
 </TASK>


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@xxxxxxxxxxxxxxxxxxxxxxxxx

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This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx.