From: syzbot ci <syzbot+cid397fd2b137e247c@syzkaller.appspotmail.com>
To: arnd@arndb.de, bcm-kernel-feedback-list@broadcom.com,
bryan-bt.tan@broadcom.com, corbet@lwn.net, eperezma@redhat.com,
graf@amazon.com, gregkh@linuxfoundation.org,
jasowang@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, mst@redhat.com,
netdev@vger.kernel.org, nh-open-source@amazon.com,
sgarzare@redhat.com, stefanha@redhat.com,
virtualization@lists.linux.dev, vishnu.dasa@broadcom.com
Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com
Subject: [syzbot ci] Re: vsock: add G2H fallback for CIDs not owned by H2G transport
Date: Mon, 02 Mar 2026 23:55:55 -0800 [thread overview]
Message-ID: <69a6940b.a70a0220.135158.0007.GAE@google.com> (raw)
In-Reply-To: <20260302194926.90378-1-graf@amazon.com>
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@amazon.com
* [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@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
next prev parent reply other threads:[~2026-03-03 7:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-02 19:49 [PATCH v2] vsock: add G2H fallback for CIDs not owned by H2G transport Alexander Graf
2026-03-03 7:55 ` syzbot ci [this message]
2026-03-03 10:28 ` Stefano Garzarella
2026-03-03 12:32 ` Stefano Garzarella
2026-03-03 11:59 ` Michael S. Tsirkin
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