From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (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 312162D97B7 for ; Tue, 21 Apr 2026 15:35:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776785736; cv=none; b=AI9rJPQkk+lvqQlmRmy+O7K9HNg+fYKGk6BENwsPGwEx4VeTL0PCW3a4JyNBAJogqZH7aoVycla1v4DS0BIOSgqpNOCsTEntJEJhecVfErMFfKnRKK2nRnA78V33EO3XFTE1kc7Ikk75trfTB3M7XLRdHE+sCGmB3A/mN6wHLDQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776785736; c=relaxed/simple; bh=iqEWk6uYHERT5rbJJGWanfCq1ohLZkd0SSFaqHxel6Y=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=kaUCE82fpY2sAp4mQ4rpRizhaOujzdstLDh/u3aZ4GDuc13hm9nC2D1sldvlEqbqj3ZY+ePIHA42HFF6zIdX8ozC554buw6MOIWI8GavIi+8bBwqN05yRylSmNrIupbwEL+wKH6pJerWap0sfTQi7t+4E7xuWMKI8gy8CUcEbDI= 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=209.85.161.80 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-f80.google.com with SMTP id 006d021491bc7-66308f16ea1so6397529eaf.2 for ; Tue, 21 Apr 2026 08:35:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776785732; x=1777390532; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=kOpqBM96QcpbmuHxumsP+RAdHvAHkt+d2uQmzoGd1Dc=; b=tKuwF3hNxsLNfjcQ3LKEpTvbxCybiq8cv+kgH1VOroigu2Br/sAPh5NwC5p7qJ8GFL TRt6/7uWyn8GkODTlw9FXhsaiJWl161l2TlVX7EV90ngnahYUFixiLQG0df7Gkt0mTfE OflzNixCx4tiSP1P7BbXgAOyYBsuoY7d504xG11kWIhHaVFszWcjcN6xaGuwID0/07Qw 9s5xpjJlON7y9sUQN3SREUU3FmiooPvzwBVxpKxtedeGbSbGrNT7RWPTbDxcNFjs4pmx ki2u3tOAH7GuXwWkyWl0aydP/jpqUQCd/wJvf10FQwexIGX28gi3Q5HjED2147re2saX 0Fyw== X-Forwarded-Encrypted: i=1; AFNElJ+kr8XaolxAlaifYPs8p8ctgZs/hE78HnS5xkiBd2llBBVx5IFuv1hlh5eNPdbals/kCVfCR6Q=@vger.kernel.org X-Gm-Message-State: AOJu0YzN0DlaAfe3L0TRkOa+mFyPUUGK7pb35ui89Zp+MWyYK2zeQcDk ro0mEM2g61YoExgYXWtONRMb9BZZ9bxscBBX5BMH9yjgta624K4ODnNI1tdmsOmuWjKnYZk2WpK hhOJYsXcGo5siv1vYLjOe+cKGPo+m1GPBEweIPedXS+epqD4pSQKH/tkXIf8= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:622:b0:694:9c29:c298 with SMTP id 006d021491bc7-6949c29db53mr1049682eaf.33.1776785732069; Tue, 21 Apr 2026 08:35:32 -0700 (PDT) Date: Tue, 21 Apr 2026 08:35:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e79944.a00a0220.17a17.001a.GAE@google.com> Subject: [syzbot] [net?] kernel BUG in pn_socket_autobind From: syzbot To: courmisch@gmail.com, davem@davemloft.net, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b4e07588e743 tracing: tell git to ignore the generated 'un.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10aa8e6a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=95ee3fe1c5a8ab57 dashboard link: https://syzkaller.appspot.com/bug?extid=b3c0e6a240078433c42b compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-b4e07588.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bb7067cc2bb4/vmlinux-b4e07588.xz kernel image: https://storage.googleapis.com/syzbot-assets/46b9d3bae153/bzImage-b4e07588.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b3c0e6a240078433c42b@syzkaller.appspotmail.com netlink: 'syz.3.104': attribute type 2 has an invalid length. ------------[ cut here ]------------ kernel BUG at net/phonet/socket.c:213! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6429 Comm: syz.3.104 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline] RIP: 0010:pn_socket_autobind+0x14c/0x170 net/phonet/socket.c:202 Code: 00 00 00 00 48 8b 44 24 58 65 48 2b 05 35 85 47 09 75 2a 48 83 c4 60 89 d8 5b 5d 41 5c 41 5d c3 cc cc cc cc e8 f5 0f 3d f7 90 <0f> 0b e8 ad c8 aa f7 eb 9e e8 06 c9 aa f7 e9 6c ff ff ff e8 5c b0 RSP: 0018:ffffc900037ffa30 EFLAGS: 00010287 RAX: 000000000000084d RBX: 0000000000000000 RCX: ffffc90007544000 RDX: 0000000000080000 RSI: ffffffff8acc6aeb RDI: ffff888034de8000 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920006fff46 R13: dffffc0000000000 R14: 1ffff920006fff61 R15: ffffc900037ffe48 FS: 00007fdb20e7f6c0(0000) GS:ffff8880d63e1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce31d5ee9c CR3: 000000002d58c000 CR4: 0000000000352ef0 Call Trace: pn_socket_sendmsg+0x43/0xe0 net/phonet/socket.c:421 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x9e1/0xb70 net/socket.c:2698 ___sys_sendmsg+0x190/0x1e0 net/socket.c:2752 __sys_sendmsg+0x170/0x220 net/socket.c:2784 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdb1ff9c819 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:00007fdb20e7f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fdb20215fa0 RCX: 00007fdb1ff9c819 RDX: 0000000000008000 RSI: 0000200000000380 RDI: 0000000000000006 RBP: 00007fdb20032c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdb20216038 R14: 00007fdb20215fa0 R15: 00007ffc7b77c6b8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline] RIP: 0010:pn_socket_autobind+0x14c/0x170 net/phonet/socket.c:202 Code: 00 00 00 00 48 8b 44 24 58 65 48 2b 05 35 85 47 09 75 2a 48 83 c4 60 89 d8 5b 5d 41 5c 41 5d c3 cc cc cc cc e8 f5 0f 3d f7 90 <0f> 0b e8 ad c8 aa f7 eb 9e e8 06 c9 aa f7 e9 6c ff ff ff e8 5c b0 RSP: 0018:ffffc900037ffa30 EFLAGS: 00010287 RAX: 000000000000084d RBX: 0000000000000000 RCX: ffffc90007544000 RDX: 0000000000080000 RSI: ffffffff8acc6aeb RDI: ffff888034de8000 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920006fff46 R13: dffffc0000000000 R14: 1ffff920006fff61 R15: ffffc900037ffe48 FS: 00007fdb20e7f6c0(0000) GS:ffff8880d63e1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fce31d5ee9c CR3: 000000002d58c000 CR4: 0000000000352ef0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup