From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fanzine2.igalia.com (fanzine2.igalia.com [213.97.179.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C1C1E3DC4A3; Fri, 8 May 2026 12:09:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.97.179.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778242147; cv=none; b=biRv2oNg6c8VZh8NVW2MiDQpdfawJ8fVFBjFK0Ktdx8cznIQdPov6ho491FCOZTFU/nSXePd7vmYAZySwDqsZ3CBAidImp4qIEACQzVD7yCtel/E9q1V6X/KwD3wNfji6r2E0Ozk6x6D9oRMcFMBqrDuAXQDofpJNeFvv0/6Hag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778242147; c=relaxed/simple; bh=PefJ8JJu7/cKo7POP1k7Bbb/EL0NZmMwrKWhUR6m+LA=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=JmcTUshIMqZ7SyNeWecrr/LstuVCRVUQKRfxqiBn3Sgjfb3/y5U5y4Y+BsWe6+w0a985jmcGc3NqaPWJC8aHElcKTj62dSKHnkbpVYiyn4IxZDHHsmEk/xSuQG0HhtYTvvp3zD4OtkuWERbbprRSWX3DDiZOcXlq7hc6GT2zhpQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=cayBonKY; arc=none smtp.client-ip=213.97.179.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="cayBonKY" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From: References:To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=ZxE2F0MPlAKMA9tTYHpUj7NAcehst+ZfS8iSylAqVg4=; b=cayBonKYqJar5bSkkFVChAMPeG u8LQdQUYv2hIF1nMVMTkDIz1MLMENXW8yhLnt9DjX29H0yO95zub+3DGMRurmT1O5Rz/dmJc4zYp7 rwG4bxiUHFHRcWjvZajB8fxESXEg1CCkxECmmxDboGqtlA3C9yXRlcGwSr3tx8jkC8GwafMNeI4hC QX6cs342LAP3XSOwDYobrbfRUn6fbV6RJZCMMFjndTGCNAkPlJU7k2bEla/BECzLMZzm8bRu8fMH8 DDmDuh4Av//BNTrZHsKmVhpRGiFzwHp3O0XFqOL3gdZ3jexaJEtq6jLUMfZ1iq0NibzYjQ5kFebyp 4j/eODhg==; Received: from [138.117.126.15] (helo=[192.168.1.18]) by fanzine2.igalia.com with esmtpsa (Cipher TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_128_GCM:128) (Exim) id 1wLK0r-007ryf-5J; Fri, 08 May 2026 14:09:00 +0200 Message-ID: Date: Fri, 8 May 2026 09:08:51 -0300 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [net?] kernel BUG in pn_socket_autobind To: syzbot , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <69e79944.a00a0220.17a17.001a.GAE@google.com> Content-Language: en-US From: Helen Koike In-Reply-To: <69e79944.a00a0220.17a17.001a.GAE@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit #syz dup kernel BUG in pn_socket_sendmsg On 4/21/26 12:35 PM, syzbot wrote: > 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