From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 9691F20E6EE for ; Thu, 20 Feb 2025 15:49:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740066564; cv=none; b=Lw88bOSNBJRIMBuCQ19wJ1qlGP4CjMp7aMRq/Ppr7Ct4tQdxTNoWFkg8F9fDtAlsadILD/FKcDlrM6s5XF/FKzR96Kug6EQVnqMdwUAuNN9y33xktvEC35iC6FWwnfT3yHf+doHLPsAuPDMY5O/qJcF1CHdxQ/QP7dGIY/S7PW0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740066564; c=relaxed/simple; bh=BtzTVKwyYoFq3h8BdxnfMQT0iTCdQGmFSBTocmzD1fY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=R2j6ioIAx+NcCoTlUcQjWfc9a5yEK0vwDuc6SpSbRKpSlJIsZX9ASquq41CtkCQX/2+S+Yu+kHN57GpcdoMn7wkCZIPoMra9miQb+wbGzK/ui/KOgKou2muOX5rmMIMwYcrJvyqp5kwxWgrgyxa9scU1IDfX+kWC4UzGiA+4FqI= 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=209.85.166.206 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-f206.google.com with SMTP id e9e14a558f8ab-3d2b3882ff5so9570415ab.2 for ; Thu, 20 Feb 2025 07:49:22 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740066561; x=1740671361; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=wf8Jm20JDBfz5v2Jj0rJj5c2Yij2ZpEF6exwzlMhtyU=; b=s3W8UcGzMEbR9hfGbMArdXXKEcRpf0Pf1UvFBsmymcdIRbwd+aFKr0dnHMONxjtrSV SIpnoLzHe6O/6YysLXB5EbDoxiFUs8FncYz2dJgkI8HwrM9R3zO6nkC8BHQKezBAid0p FRHMZIRK8u2JOkglWdx9nlQ2jLr/c9YLv756zhjzPzaaxkxvpvaXC+j5/FXcdwbqFcE7 1GbfCC0uBY/ZmymFbL5nEJygh8f9HldunAv2uZWT4wlQJY3xJ2No//QBiANWkNjAFYVS 4P5PyaCbta+pFkTRQGvhVUUwNyUwxw8rp69jvkh5zfoBCP5utX7YTGmpUGkQEKgMMglA a4iQ== X-Forwarded-Encrypted: i=1; AJvYcCXXTDe1NtxRP5u2WD0sE+OCZV+GwhmQuQVsiW5tifd+kkjrPGno76zzNNzV5zjkZxIISkDTvdoHcpvoY14=@vger.kernel.org X-Gm-Message-State: AOJu0YywlzRE87Jel3QSUyrJq2oxRo3RUtHVdYOVUjtJzSYPs/nDBK4u Eiyh48WSp+OJi9R0VQrauYd2CF5zR6zaOAYTyAwgPJ10F0Vmt1Jkq46YNpECh+FJQYefgkpomiK PYbTbGIw5Q+L8wnDN2Og5FlmUzcFYe618lg5fhq75UBm3IuPrnBH6v0A= X-Google-Smtp-Source: AGHT+IFG+Vu3WzQSx3a0Yr35JXD7UykQ+Y2qZ7Iqihca6ZPy+CAPIcujlZCMwzVCfL79X3uBRcegGL1/bZnD+rTcmvutdH7S9wCb Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2143:b0:3d1:99bd:5503 with SMTP id e9e14a558f8ab-3d2b536ef9dmr80148875ab.14.1740066561655; Thu, 20 Feb 2025 07:49:21 -0800 (PST) Date: Thu, 20 Feb 2025 07:49:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67b74f01.050a0220.14d86d.02d8.GAE@google.com> Subject: [syzbot] [net?] KMSAN: uninit-value in __ipv6_addr_type From: syzbot To: davem@davemloft.net, dsahern@kernel.org, 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: 6537cfb395f3 Merge tag 'sound-6.14-rc4' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d4a7f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8cf1217edc1cc7da dashboard link: https://syzkaller.appspot.com/bug?extid=93ab4a777bafb9d9f960 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/0b4a6e38bb6d/disk-6537cfb3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/96b70942c42c/vmlinux-6537cfb3.xz kernel image: https://storage.googleapis.com/syzbot-assets/fd3dc281a360/bzImage-6537cfb3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+93ab4a777bafb9d9f960@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in __ipv6_addr_type+0xa2/0x490 net/ipv6/addrconf_core.c:47 __ipv6_addr_type+0xa2/0x490 net/ipv6/addrconf_core.c:47 ipv6_addr_type include/net/ipv6.h:555 [inline] ip6_route_output_flags_noref net/ipv6/route.c:2616 [inline] ip6_route_output_flags+0x51/0x720 net/ipv6/route.c:2651 ip6_route_output include/net/ip6_route.h:93 [inline] ipvlan_route_v6_outbound+0x24e/0x520 drivers/net/ipvlan/ipvlan_core.c:476 ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:491 [inline] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:541 [inline] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:605 [inline] ipvlan_queue_xmit+0xd72/0x1780 drivers/net/ipvlan/ipvlan_core.c:671 ipvlan_start_xmit+0x5b/0x210 drivers/net/ipvlan/ipvlan_main.c:223 __netdev_start_xmit include/linux/netdevice.h:5150 [inline] netdev_start_xmit include/linux/netdevice.h:5159 [inline] xmit_one net/core/dev.c:3735 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3751 sch_direct_xmit+0x399/0xd40 net/sched/sch_generic.c:343 qdisc_restart net/sched/sch_generic.c:408 [inline] __qdisc_run+0x14da/0x35d0 net/sched/sch_generic.c:416 qdisc_run+0x141/0x4d0 include/net/pkt_sched.h:127 net_tx_action+0x78b/0x940 net/core/dev.c:5484 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561 __do_softirq+0x14/0x1a kernel/softirq.c:595 do_softirq+0x9a/0x100 kernel/softirq.c:462 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:389 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x2758/0x57d0 net/core/dev.c:4611 dev_queue_xmit include/linux/netdevice.h:3311 [inline] packet_xmit+0x9c/0x6c0 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3132 [inline] packet_sendmsg+0x93e0/0xa7e0 net/packet/af_packet.c:3164 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:733 __sys_sendto+0x594/0x750 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2190 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: ipvlan_route_v6_outbound+0x18f/0x520 drivers/net/ipvlan/ipvlan_core.c:466 ipvlan_process_v6_outbound drivers/net/ipvlan/ipvlan_core.c:491 [inline] ipvlan_process_outbound drivers/net/ipvlan/ipvlan_core.c:541 [inline] ipvlan_xmit_mode_l3 drivers/net/ipvlan/ipvlan_core.c:605 [inline] ipvlan_queue_xmit+0xd72/0x1780 drivers/net/ipvlan/ipvlan_core.c:671 ipvlan_start_xmit+0x5b/0x210 drivers/net/ipvlan/ipvlan_main.c:223 __netdev_start_xmit include/linux/netdevice.h:5150 [inline] netdev_start_xmit include/linux/netdevice.h:5159 [inline] xmit_one net/core/dev.c:3735 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3751 sch_direct_xmit+0x399/0xd40 net/sched/sch_generic.c:343 qdisc_restart net/sched/sch_generic.c:408 [inline] __qdisc_run+0x14da/0x35d0 net/sched/sch_generic.c:416 qdisc_run+0x141/0x4d0 include/net/pkt_sched.h:127 net_tx_action+0x78b/0x940 net/core/dev.c:5484 handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:561 __do_softirq+0x14/0x1a kernel/softirq.c:595 Uninit was created at: slab_post_alloc_hook mm/slub.c:4121 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_node_noprof+0x907/0xe00 mm/slub.c:4216 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1331 [inline] alloc_skb_with_frags+0xc8/0xd00 net/core/skbuff.c:6612 sock_alloc_send_pskb+0xa81/0xbf0 net/core/sock.c:2897 packet_alloc_skb net/packet/af_packet.c:2981 [inline] packet_snd net/packet/af_packet.c:3075 [inline] packet_sendmsg+0x7722/0xa7e0 net/packet/af_packet.c:3164 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg+0x30f/0x380 net/socket.c:733 __sys_sendto+0x594/0x750 net/socket.c:2187 __do_sys_sendto net/socket.c:2194 [inline] __se_sys_sendto net/socket.c:2190 [inline] __x64_sys_sendto+0x125/0x1d0 net/socket.c:2190 x64_sys_call+0x346a/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:45 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 6373 Comm: syz.3.101 Not tainted 6.14.0-rc3-syzkaller-00060-g6537cfb395f3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ===================================================== --- 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