From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) (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 52E311B6D18 for ; Thu, 24 Oct 2024 22:43:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729809810; cv=none; b=LFmlB87XzVt3jBcxX6IoboGQJC1gA7ENkeqf1kRJFQ4wxCNulkwEFFd2Fkw/+lAqWZ5u4TcUjnEzUsZdBh+q1M2eO8O7mXZcLMAEn+0QE5NR8X8Du54JMQq9lAuyrA4juOU/RhADWU0yzvnjhvt199a8w2SVb6VdVPFP2O9Ax/4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729809810; c=relaxed/simple; bh=/5ZYiZzp0GCwEHzhlO4n5c7xBYQikJ94R0K09EPhww4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=EldxyRri1woeigZSyQX0bd2S+gFploZjBOzQzc0xy1/zztmcRX1R0N6Kd6eJDd1pz0RC7oszBqW00u/Tio1vHeWBdBu7J3Ih6qmLAaiJwc9cI4xC/humy6JXDeCzNn7wv1Ur/V3XMDCPQzQxp8WLHKdb9DhI4C/negBotEldXv4= 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=209.85.166.197 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-f197.google.com with SMTP id e9e14a558f8ab-3a3cb771556so12702755ab.3 for ; Thu, 24 Oct 2024 15:43:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729809806; x=1730414606; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=oYhwuTsK8ErK8pqCznBjVR9j914DxkP9wNsyhF8XfNE=; b=cQTA8/qTIRdg6KB1xH6mkOz0dBWUY4Bjy4KgCK59ltMZr+q3jxcgbAVLwH4+mBRMk/ XfP5uQYYuRne+J+DVFtTDZ7LclEEjyIWsZyh2mwvX5Ef6MD8hH49MUCSVKQgiM695vNn iJXxIwsQSGi7dbekBdJgRml073vK6PWuB8b8iAXJKWVZaZzr8iupHvCmR3WlonFaGcpd 5w4ubg6xg1WA9T1Td3lNOv8x/3+lbv4jRMnr8Nso3MAqiQvnsTco4zZo/Z538+l6rVY9 +RFjhLsNGpF3UmANL9+6oVYthNIqqOP3tD+fe5RF9ZK/5Uld8l4rD7QQyR4Q7w8T4AQt 32fA== X-Forwarded-Encrypted: i=1; AJvYcCUBcA6ifGJBSRbX5bYuMnS91KmYTATpDAQ0/BxP/DL8vPDqkojUy+Dp8q2lqJheWq4lD6v+qmY=@vger.kernel.org X-Gm-Message-State: AOJu0YxPpQ2mcN9kCNNmAFoNTj2MHYQloknLQ/HGvB1FIHIB+aGOE/gg hNFMSfCc2TYCP0ehwvNw6YVP/2sDOFnaoEgzwEu42acEFu4PQWj2Sw8OrlksE9msngkHc5FoJ0k FCHNnVw8NT3iirycGySZiSwFwYo+w3U5iYryQ9RGwpbPyNRG7jAuXDTs= X-Google-Smtp-Source: AGHT+IHYrJDXK6aFf17ulAjn+yC+63HeE3NGSQGIClDwD8lYhcUEcg0knjLbI0x9uvE/qx2paCHgOGrAMeLJEIGuG1oRFJWpNaW8 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1564:b0:3a3:aff3:a02b with SMTP id e9e14a558f8ab-3a4d596356amr89928775ab.6.1729809806558; Thu, 24 Oct 2024 15:43:26 -0700 (PDT) Date: Thu, 24 Oct 2024 15:43:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <671acd8e.050a0220.381c35.0004.GAE@google.com> Subject: [syzbot] [afs?] [net?] KMSAN: uninit-value in rxrpc_lookup_peer_rcu From: syzbot To: davem@davemloft.net, dhowells@redhat.com, edumazet@google.com, kuba@kernel.org, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, marc.dionne@auristor.com, 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: db87114dcf13 Merge tag 'x86_urgent_for_v6.12_rc4' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12cf2a40580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7a0aee472a2b5f0a dashboard link: https://syzkaller.appspot.com/bug?extid=14c04e62ca58315571d1 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/140719cfa0c4/disk-db87114d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/fb8a264c89a8/vmlinux-db87114d.xz kernel image: https://storage.googleapis.com/syzbot-assets/4de63179d231/bzImage-db87114d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+14c04e62ca58315571d1@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in rxrpc_lookup_peer_rcu+0x2f8/0x300 net/rxrpc/peer_object.c:142 rxrpc_lookup_peer_rcu+0x2f8/0x300 net/rxrpc/peer_object.c:142 rxrpc_lookup_peer_local_rcu net/rxrpc/peer_event.c:97 [inline] rxrpc_input_error+0x756/0x16e0 net/rxrpc/peer_event.c:148 rxrpc_io_thread+0x13aa/0x5190 net/rxrpc/io_thread.c:498 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: rxrpc_input_error+0x499/0x16e0 net/rxrpc/peer_event.c:148 rxrpc_io_thread+0x13aa/0x5190 net/rxrpc/io_thread.c:498 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] ipv6_local_error+0xd0/0xa10 net/ipv6/datagram.c:354 __ip6_append_data+0x6f3/0x68e0 net/ipv6/ip6_output.c:1491 ip6_make_skb+0x5bd/0xd60 net/ipv6/ip6_output.c:2048 udpv6_sendmsg+0x3b5e/0x40c0 net/ipv6/udp.c:1584 do_udp_sendmsg net/rxrpc/output.c:32 [inline] rxrpc_send_data_packet net/rxrpc/output.c:488 [inline] rxrpc_transmit_one+0xf68/0x2f20 net/rxrpc/output.c:713 rxrpc_decant_prepared_tx net/rxrpc/call_event.c:271 [inline] rxrpc_transmit_some_data net/rxrpc/call_event.c:295 [inline] rxrpc_input_call_event+0x18ba/0x2c10 net/rxrpc/call_event.c:401 rxrpc_io_thread+0xa5c/0x5190 net/rxrpc/io_thread.c:478 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 CPU: 0 UID: 0 PID: 12896 Comm: krxrpcio/0 Tainted: G W 6.12.0-rc3-syzkaller-00454-gdb87114dcf13 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ===================================================== --- 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