From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f72.google.com (mail-oo1-f72.google.com [209.85.161.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2350340273 for ; Tue, 3 Mar 2026 07:55:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772524558; cv=none; b=hMwD5rGWOsaqrm8a2KXippU7eJS/lb6thcLcKrnYouVtYR5+Mqvsxvs4SJ646I/eChOfwJgL0m9klsfQkRYyyyY9n+Ayjv9S68D5hNFfaM9Arz9g1DcpW+Dtb1yyJGQpUdIrzVGTl/gKtI9AWiypyBk3Y1jQzPYk+XUTgT7A2cw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772524558; c=relaxed/simple; bh=Gji/OjmRu0DwoNZkvvQ+kxjDH0bpk0ZgWsanNwBiuF4=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=QPxcdI/Ckkcse4gkUIxatTeddVG7HDyprmu5lbWZ5V0N9/7RhDBacpXM/n/c3XgfO/HcYFxPRoHZDV+L19MfTmJLGQ47i+fgb4aPCg9qw4nuRKS6x9nImE1JM7fHCCG6JysGetlXAE7oi9Qv0htxdcKkGGqG8vAdShfNAdvsxfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f72.google.com with SMTP id 006d021491bc7-67999893008so47380258eaf.2 for ; Mon, 02 Mar 2026 23:55:56 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772524556; x=1773129356; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FgQSOpB+ewXh4n0VbeXUwNcBjIkpybIpFZepNJXEjKc=; b=ky/k52JRS1GhSDBcWjNFcyfHISPY4h364mseoveGL6hiW1LXXz6B7aAMYoRAGC5+q4 eUihuKstv+kJmwjovXbQ579lViYGO8gpPVxCmx7lgEmXHKVaxK8TObThor5kDRI4l9XS RHczKKS5aO+pUqd7dbonNyycc/3hg1k3ZZ3NAAlNHuOt4nRMT62+d4FXMV2Fr8SNLYeV O+ytGHTPK17JF1XOmBRmqVb/OuJza/2nQqdKN23m2QYbPo4zHadVPBiyuM5t9AOrHOJs G0ZkzLUPf477pEhvLoHt9ysU/7Ar3vl+1gIXqe8xYZV0csqzElUAlsncqz28GTtyeg0f QlNQ== X-Forwarded-Encrypted: i=1; AJvYcCVYcy7gXzu43tLQGufandtFdJkw5niCrGiRGpAHxYU/UtNVfxoWGHk8KghBwFmXsYy4GEmo4zd35PD1i4KMkA==@lists.linux.dev X-Gm-Message-State: AOJu0YwKTwVPhn/onTwMds7hVCnosLmW9zAKknKU2/GbBwqSL3/ABs6/ j81Pcmq4nVje9J2M4Wiub+hHJWG6goTpPYI3ZVa9GGSwN7C9Lo33hy40feoKkPefKWFU9HMnrsd xow2Mm5Tzk86WcGJ0MaX1nRrdNWMhATfyryoBPedNc65tfLdYl2XBhnpeC1M= Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1895:b0:663:1b8:9c74 with SMTP id 006d021491bc7-679faf8da8emr7462390eaf.68.1772524555798; Mon, 02 Mar 2026 23:55:55 -0800 (PST) Date: Mon, 02 Mar 2026 23:55:55 -0800 In-Reply-To: <20260302194926.90378-1-graf@amazon.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a6940b.a70a0220.135158.0007.GAE@google.com> Subject: [syzbot ci] Re: vsock: add G2H fallback for CIDs not owned by H2G transport From: syzbot ci 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 Content-Type: text/plain; charset="UTF-8" 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: 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 *** 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.