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 75FCB2030B for ; Sat, 9 Mar 2024 16:02:32 +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=1710000154; cv=none; b=eb63yiqBRAZKY12sDRr2K44+ZWckmSCycnhVMj917mk5FXBi26SfpQgJ7FVYM6SN4K8NlaHPdMnbXXzCrxv0sI+HzPcB5XMiZVPg8klWIZetd9gMTWPnN89FIcxjBISLGqEQb2zwnpi3E57VJc/NbRpbw+NmzF/tzyE4iDU3kNk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710000154; c=relaxed/simple; bh=IlNrku6gx4ITKYYDutuHTeSlU+G5G6ZUR+kyBRWRaxU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=OchLYQsSYioP6OI7OkO1rIiiPHSHeXR5nZWJSZS9iwz6aTRyQw/5ElKGSYTVjaDT+JoGVkBqzBUAAkMIa4AQ9+4pqBIRrldZ+lwl1K4HFFVDkeu4FmfMF/sPy/2Ka6NklHWor2R9sckk0xt7RjU1c1Pr1eIjOL2+PxiAJv29QIw= 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-36512fcf643so29149425ab.1 for ; Sat, 09 Mar 2024 08:02:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1710000151; x=1710604951; 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=DP1DpJ1i+QrXcPetYGEJb/XTbYsSwgXExEyAIL0rh6k=; b=qrJoFA0DTSDsYjNNTEkfCE63Qg9ODW3PmzRggWbX0ejmswKgTpnuuKvZGvGrQ1GF7F z0RIUZNhqkjresHuq7mny3hfB62adOapheomiK1WuQ4J3MUXwL7wtpVjb/CUac7Jcq+F OW3+QbjilwBlJEWP2iZU0dckkDlt/6WyG99x2OQuLHWsawp7O99jFtBNZoAZRUohiYxC ck3YyQ3wN7lBHCfpbBA/yD1MLA3PGw/BawqgGM4k4ib9sLnFUFu5IaB8NQJ7hhivbWyo dRY9FBFxsa4zhWu6GhlWiL892GfsQD5f3K7dYpEZO6FJcrn9uHyz2u4vz9Knvap04D3G BrWg== X-Forwarded-Encrypted: i=1; AJvYcCWUSjdUrIOaJ+a5FYW39k9jPWn4eoK6AO5sZLiROkTGIGPxB3vEA7sIVjO6DgwsyZYoIoUO245+MYRBV1itGDEGpREslQ2G X-Gm-Message-State: AOJu0YyKjvwjQxD8QJ7irqwMPeW/VcmwjxoiGjvyO9bjSrkdmFnwNykk KgfmXWs8hUN3mrN4uaLgav/Z6boVqESdA/3I83Htel+/eBccqpbCuKi4+CCMpAE1fAcJX7AZQZX J3nFIHX9oe/EPjPQWyux/5gcWqaUAt+pZWmJst7mGc+aZ6LEzMG78EgU= X-Google-Smtp-Source: AGHT+IEnqyTXCKSaxdQhDPFxJ8eQG150S4a4p8lsjTHwF8btT+LJXq03mW7lZ6jdcK/owA+1HcGU/bIv3caTBoQsj1oarwHDYhAI Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1d8e:b0:365:7607:3f4b with SMTP id h14-20020a056e021d8e00b0036576073f4bmr61509ila.2.1710000151675; Sat, 09 Mar 2024 08:02:31 -0800 (PST) Date: Sat, 09 Mar 2024 08:02:31 -0800 In-Reply-To: <00000000000088981b06133bc07b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000009b652f06133c6f27@google.com> Subject: Re: [syzbot] [net?] kernel BUG in __nla_validate_parse From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, petrm@nvidia.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: d7e14e534493 Merge tag 'mlx5-socket-direct-v3' of git://gi.. git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1179b11e180000 kernel config: https://syzkaller.appspot.com/x/.config?x=63afafeedf00ef8f dashboard link: https://syzkaller.appspot.com/bug?extid=65bb09a7208ce3d4a633 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=113a3399180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=156404d6180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6e15425ce891/disk-d7e14e53.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/290e40cea50b/vmlinux-d7e14e53.xz kernel image: https://storage.googleapis.com/syzbot-assets/099bac6ed92e/bzImage-d7e14e53.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+65bb09a7208ce3d4a633@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at lib/nlattr.c:411! invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 PID: 5074 Comm: syz-executor243 Not tainted 6.8.0-rc7-syzkaller-02431-gd7e14e534493 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:validate_nla lib/nlattr.c:411 [inline] RIP: 0010:__nla_validate_parse+0x2f61/0x2f70 lib/nlattr.c:635 Code: 48 8b 4c 24 18 80 e1 07 38 c1 0f 8c e0 f7 ff ff 48 8b 7c 24 18 e8 ff 0e 1d fd e9 d1 f7 ff ff e8 d5 c2 91 06 e8 50 64 ba fc 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900041b6ec0 EFLAGS: 00010293 RAX: ffffffff84d90ad0 RBX: ffffffff8caa11e0 RCX: ffff8880283bd940 RDX: 0000000000000000 RSI: 000000000000004e RDI: 0000000000000015 RBP: ffffc900041b7100 R08: ffffffff84d8df5b R09: 0000000000000000 R10: ffffc900041b71a0 R11: fffff52000836e46 R12: 0000000000000008 R13: 1ffff11003d97c83 R14: 000000000000004e R15: 0000000000000008 FS: 0000555556b10380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045ad50 CR3: 000000007aa22000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __nla_parse+0x40/0x60 lib/nlattr.c:732 __nlmsg_parse include/net/netlink.h:756 [inline] nlmsg_parse include/net/netlink.h:777 [inline] rtm_del_nexthop+0x257/0x6d0 net/ipv4/nexthop.c:3256 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8e0/0xcb0 net/netlink/af_netlink.c:1902 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f70bac1d369 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcffdc2f38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffcffdc3108 RCX: 00007f70bac1d369 RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 RBP: 00007f70bac90610 R08: 0000000000000000 R09: 00007ffcffdc3108 R10: 00007f70bac589e3 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffcffdc30f8 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:validate_nla lib/nlattr.c:411 [inline] RIP: 0010:__nla_validate_parse+0x2f61/0x2f70 lib/nlattr.c:635 Code: 48 8b 4c 24 18 80 e1 07 38 c1 0f 8c e0 f7 ff ff 48 8b 7c 24 18 e8 ff 0e 1d fd e9 d1 f7 ff ff e8 d5 c2 91 06 e8 50 64 ba fc 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900041b6ec0 EFLAGS: 00010293 RAX: ffffffff84d90ad0 RBX: ffffffff8caa11e0 RCX: ffff8880283bd940 RDX: 0000000000000000 RSI: 000000000000004e RDI: 0000000000000015 RBP: ffffc900041b7100 R08: ffffffff84d8df5b R09: 0000000000000000 R10: ffffc900041b71a0 R11: fffff52000836e46 R12: 0000000000000008 R13: 1ffff11003d97c83 R14: 000000000000004e R15: 0000000000000008 FS: 0000555556b10380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045ad50 CR3: 000000007aa22000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.