From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 B5810189F56 for ; Thu, 26 Jun 2025 14:28:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750948085; cv=none; b=ojE1wieLsBz+jk00T5kwrWhhxOQyN8077E4IVET8XmufdIHqquRKLuwXF3vtMNjFdOd1NmZNeg6nBwVLeBBwdv6kdsRdNtUdQd/NBzM4KYrf1EriPrj131tVod8tvBhWdONdot3IE5+/O1T4JoJ4F9oBwT4Rmid4ByIl7/7HIq8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750948085; c=relaxed/simple; bh=ktzW2OhkXnYljKjLdNLNOdVGTFmZPmWeSJDJY+2l0/Y=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=pCooUsv8/K096fwQuk6tTs+ZSCHiWDNAPZqqOS+iLoNB6RIwZ1psXWBCFX1Jq9DosHH5N3tnlBBYgdqQf2Y7XNcP66NPrmY4rbBXjW9rOQzZCVouida+fMa/QMAA56HFDbPVU32dJw3biGiHTqFhRt2K7S68r57oUcPskwCx1W0= 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=209.85.166.200 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-il1-f200.google.com with SMTP id e9e14a558f8ab-3df33f39384so5457365ab.1 for ; Thu, 26 Jun 2025 07:28:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750948083; x=1751552883; h=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=gO38/4M06l5OKkUA2reeIgi0o0RwwUe+Rrp/9eUtlKE=; b=aPv0YQ0EI63I1a2XnVDmT/lAHmapbomOKQHc9hO2okE6WeiepfLOnjZHfngdWKQjoj m7GvwJT9pBzTxzsBz0AGwSrGpMJXYCy+GxOTdk/r6sYOzvGgCH0ZzGZfXKUVibiTWn8N a50Fqh5B80ZD4r3F08Jti76hV2V9QDpBvp4mcAOnP4hElGCGCwaOO0mQ9Iy+aXUyuZXI IkKpK3hUtNq/ul6rUHCew0UIpjKeVRo3rd2MVqJq6Nfof4fkv63EBXVaEl+oVonUSKXK u+awfyiL0uSH2YdjC6PLDSisecJEym6i6xPPH1tgbid7PjIDcrZH4vPtEyCETJUoh99o 3bLQ== X-Forwarded-Encrypted: i=1; AJvYcCV51lWtA3oaAZfIBhfu9MSMexahkzq3sduX1FB3EoVIAUB+gsNI5cbL2TDpkfDlxbpYT9GZ0zdIZDOMj38=@vger.kernel.org X-Gm-Message-State: AOJu0YyXvJrCiLqcM/jj6U0pqiaQbtuStvoOeYD3sFEhgWNY/TobezTq MscKpZfui2DooHHbrWjgKt2RZQCiMjjFMvHrblei6XF5AQv8I+kD8b092jZn8hfqxJAd4p0HJA8 t/n03kX4oSA+gUu6pCjJKlgIe4WhPy6Ffo9dj+Jn+lqokXauVp31eF4tHGbQ= X-Google-Smtp-Source: AGHT+IGdo+TlcpnMqEleSm+ikDun13c/8HBGvo1Sw6ciGGLXHawtIDl28GZsukwkiYQdptRPLatY5Ze27xrXjtxaveI6zTxRITc+ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:16cb:b0:3df:3be7:59d1 with SMTP id e9e14a558f8ab-3df3be7658cmr60854735ab.11.1750948082845; Thu, 26 Jun 2025 07:28:02 -0700 (PDT) Date: Thu, 26 Jun 2025 07:28:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <685d58f2.a00a0220.34b642.0110.GAE@google.com> Subject: Re: [syzbot] [hams?] possible deadlock in nr_rt_ioctl (2) From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in nr_remove_node_locked ------------[ cut here ]------------ WARNING: CPU: 2 PID: 6679 at net/netrom/nr_route.c:290 nr_remove_node_locked+0x1b3/0x200 net/netrom/nr_route.c:290 Modules linked in: CPU: 2 UID: 0 PID: 6679 Comm: syz.0.45 Not tainted 6.16.0-rc3-syzkaller-gee88bddf7f2f-dirty #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:nr_remove_node_locked+0x1b3/0x200 net/netrom/nr_route.c:290 Code: be ff ff ff ff 48 c7 c7 58 50 59 90 e8 46 dc 10 01 31 ff 89 c5 89 c6 e8 6b 65 4f f7 85 ed 0f 85 a4 fe ff ff e8 1e 6a 4f f7 90 <0f> 0b 90 e9 96 fe ff ff 48 c7 c7 44 2d a7 90 e8 e9 47 b6 f7 e9 6e RSP: 0018:ffffc90003b47ab0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888025854f00 RCX: ffffffff8a6cb3d5 RDX: ffff8880442a0000 RSI: ffffffff8a6cb3e2 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: ffff88803c362000 R14: ffff888026762c00 R15: 0000000000000000 FS: 00007f21787756c0(0000) GS:ffff8880d6974000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e55ffff CR3: 000000004f9b7000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nr_del_node net/netrom/nr_route.c:347 [inline] nr_rt_ioctl+0x1fc7/0x26f0 net/netrom/nr_route.c:675 nr_ioctl+0x19a/0x2e0 net/netrom/af_netrom.c:1254 sock_do_ioctl+0x115/0x280 net/socket.c:1190 sock_ioctl+0x227/0x6b0 net/socket.c:1311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2177985d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2178775038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2177b75fa0 RCX: 00007f2177985d29 RDX: 0000000020000180 RSI: 000000000000890c RDI: 0000000000000005 RBP: 00007f2177a01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2177b75fa0 R15: 00007fff2cb7c2d8 Tested on: commit: ee88bddf Merge tag 'bpf-fixes' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=170adb70580000 kernel config: https://syzkaller.appspot.com/x/.config?x=644a0493ff5118b1 dashboard link: https://syzkaller.appspot.com/bug?extid=14afda08dc3484d5db82 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=116bb182580000