From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 9E07E1A239F for ; Wed, 9 Apr 2025 14:32:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744209152; cv=none; b=ZQHL+r03t0UGdezysLkMyYcfkByHrGNJwUl88hj0D13GSuLC2wFl/YC5GcZ3O+Ca8NOaTtfQLWzavx3n9egt69ELikYcEYNrNz2X7h2HdvzrU1pTrqwvhGklj7HaMuLeHtNkWJpiQoe2LnJqwauDmY9zd0TWkUXMw52cHtpztEI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744209152; c=relaxed/simple; bh=HuiEp+9QHj6PTNBdnkm5x4zYQBreulDB2Wg2oZqnIdU=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=qKccPpzYFuUmxY6OLQX+JQxe+PpBPvlSvNb8X1GZ/QunoqQz6gkfuzcCrUjrzHdh5NK6SbV9D7VmIswu5XEHfdj+qmDve1Ov+oH3ZX/F5G9WERYFhq8oQ57BJhMbqsF5avXACkP7arPBIDc2cOL8GcFJX7KezvSsoUnr/qI6uFo= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3d451ad5b2dso8307295ab.0 for ; Wed, 09 Apr 2025 07:32:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744209149; x=1744813949; 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=n1zaeuHbhS5F7qKe4+xVWwP5j3MS9s5Jd50ybDTISJc=; b=pm+1FzuKNjjXywunjgDCZRml/JgrCgpUh+/OloyrQeD/H3qdEUNzoEEoliwcJIHqX/ +OIm5lXgNUI4/NSHqvr8deK9hCzH2DzH7cS/8ApET6/tayJGc/YhWqD/AjQ6HoKkg8Xr DfvzFZ6/sXbKU4iSB77Jcae8Z5NTbU+32XObOieklop82PPQUBIY2Az2OmiV5QK9KjTX sa7PXFMRlK8mhvOD1mJRKJ/LKzkm2cj7li0BvQpO0bfH9wt81T59ejCSyeNKYbaA3K3b ALw/jv1MqgSChqG9S8aZ78sy5syMPNLNxzBWeNUfBRYmprgWSal5ZSaa6v+Zd6+EHEMh gTSQ== X-Forwarded-Encrypted: i=1; AJvYcCUSoBhQtICO8bT0fANHzIwO9fUg8UCnSHZppdAiLORu3aKUeavQbfcrzPRXU7fzt1i13pF9uNk=@vger.kernel.org X-Gm-Message-State: AOJu0Yz3SBfwruPImYv+ZEBQdoIUkurWMoYRyDNQvSBVmVYwKNM+XWyg /HBrwaiTOgli6jHr2Aa9DAGp11tpOmUpNrGUMe+KN77thW4mikMAlD8CYI4a5SZ6x7ssWOtllnV yswJSjzerRDX5dElvf49ri+CTIsHSVobUZo3jFdTSJ0ZZobIKoq3uGxg= X-Google-Smtp-Source: AGHT+IFEosU1M9V36tUakIkmCYwraiqzePN5cuZuIqi47BPRqD5pWtHWGRbPHQe2mdTGfgx18w0cTqWq+D/Bca7BX5/2LU+I0mMv Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12ce:b0:3d0:26a5:b2c with SMTP id e9e14a558f8ab-3d76bc2e9a3mr25448065ab.8.1744209149572; Wed, 09 Apr 2025 07:32:29 -0700 (PDT) Date: Wed, 09 Apr 2025 07:32:29 -0700 In-Reply-To: <67d99951.050a0220.3d01d1.013e.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f684fd.050a0220.25d1c8.0005.GAE@google.com> Subject: Re: [syzbot] [net?] WARNING in udp_tunnel_update_gro_rcv 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" syzbot has found a reproducer for the following issue on: HEAD commit: 420aabef3ab5 net: Drop unused @sk of __skb_try_recv_from_q.. git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=14c92c04580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f2054704dd53fb80 dashboard link: https://syzkaller.appspot.com/bug?extid=8c469a2260132cd095c1 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=169eb23f980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17abfb4c580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9e407e3b3a07/disk-420aabef.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/08826ad1cf0b/vmlinux-420aabef.xz kernel image: https://storage.googleapis.com/syzbot-assets/df2ffedb4e99/bzImage-420aabef.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8c469a2260132cd095c1@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5837 at net/ipv4/udp_offload.c:123 udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123 Modules linked in: CPU: 0 UID: 0 PID: 5837 Comm: syz-executor850 Not tainted 6.14.0-syzkaller-13320-g420aabef3ab5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:udp_tunnel_update_gro_rcv+0x28d/0x4c0 net/ipv4/udp_offload.c:123 Code: 00 00 e8 c6 5a 2f f7 48 c1 e5 04 48 8d b5 20 53 c7 9a ba 10 00 00 00 4c 89 ff e8 ce 87 99 f7 e9 ce 00 00 00 e8 a4 5a 2f f7 90 <0f> 0b 90 e9 de fd ff ff bf 01 00 00 00 89 ee e8 cf 5e 2f f7 85 ed RSP: 0018:ffffc90003effa88 EFLAGS: 00010293 RAX: ffffffff8a93fc9c RBX: 0000000000000000 RCX: ffff8880306f9e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff8a93fabe R09: 1ffffffff20bfb2e R10: dffffc0000000000 R11: fffffbfff20bfb2f R12: ffff88814ef21738 R13: dffffc0000000000 R14: ffff88814ef21778 R15: 1ffff11029de42ef FS: 0000000000000000(0000) GS:ffff888124f96000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f04eec760d0 CR3: 000000000eb38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: udp_tunnel_cleanup_gro include/net/udp_tunnel.h:205 [inline] udpv6_destroy_sock+0x212/0x270 net/ipv6/udp.c:1829 sk_common_release+0x71/0x2e0 net/core/sock.c:3896 inet_release+0x17d/0x200 net/ipv4/af_inet.c:435 __sock_release net/socket.c:647 [inline] sock_close+0xbc/0x240 net/socket.c:1391 __fput+0x3e9/0x9f0 fs/file_table.c:465 task_work_run+0x251/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa11/0x27f0 kernel/exit.c:953 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f04eebfac79 Code: Unable to access opcode bytes at 0x7f04eebfac4f. RSP: 002b:00007fffdcaa34a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f04eebfac79 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 00007f04eec75270 R08: ffffffffffffffb8 R09: 00007fffdcaa36c8 R10: 0000200000000000 R11: 0000000000000246 R12: 00007f04eec75270 R13: 0000000000000000 R14: 00007f04eec75cc0 R15: 00007f04eebcca70 --- 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.