From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) (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 7D902277CA5 for ; Sat, 11 Oct 2025 14:13:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760191987; cv=none; b=j8v1yBWpMWrXcUkV3Dy/rO+sU1oV9h3GLQlC7mGkVkaP4Fot8IUY1yYRqVtpCxxFyfle4obppK1Cy8GCq09VGoIQ/JJE+HM54HnwzIh9eU6fTuQvwfqU8sX30HoFUNu2MW+wtysFJe1zQQfZAwp3JVVFBIGd/CYJibxJHl/Siy0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760191987; c=relaxed/simple; bh=rMo7HfRIE7eA6+jB+hLqNHgWOJShn+j7QG+I35e6KqY=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=GlsO50AVXu08MXwh4mGb8j3+Fj/3BY4CaImSYQtlWj+XLkM2KUIwXC9mbHN5mn/Mr3qH1Lo+908lTKCR0ZlWwt+TyMSEeKueKbo9lORC1+yFOtnbhzGPawwZwvQRLYhv++dqRlgN35W3I6wSe/GuZ2JPAZmUJnNeCKcM3Wc7pb0= 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=209.85.166.72 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-io1-f72.google.com with SMTP id ca18e2360f4ac-927f4207211so1303450839f.3 for ; Sat, 11 Oct 2025 07:13:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760191984; x=1760796784; h=cc: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=ip+uLuuOjcts4R2e3BONfrdlhtbZShsrdc7YY7Z9NqQ=; b=AvzMEUSuA7hmNre+J6hANr6DSRZlz6D1VDNmfCDbqqTdTLnBp5Qj+UhR+0fWNBjXNd 7B2LUfY5B7xA3V4tW11GUJESpL4VQ26PV1xPTMmDyyZGj7Xf6mFNiZFHnwEOd3VIgvmH gBHDvRpkrfNoGuoDIxXSZLO/6/TmnjiUf0FNkCBw71kUGXUfqZ72RyvTIkDzOu5rrWM/ Rl+vDUb2W6rqHgZ0l7yqRj4vOU7ecN63UL7Dy7u8aFmE5k3iMK+/m/2H6EM2pDxZLUIv O6OtYCSdSh3Oh3f8ohhtrphhjGOZ4W3GVhHS5DMn/C+8wh9qlP/Elb7mCf1QIRLX3v1T AFxg== X-Forwarded-Encrypted: i=1; AJvYcCVx8E+4jr33v2V84lzRZTYzQYPiZVsAbkj33fSUUV0ylk3vlYzz4NwZGd8VhTBYP8FL6UhN/zA=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5CnLyUUGG6cUjgUYuMTN6GnxqUY2sadSkPy2CHYFa/UfI7jGT WFhhSxYjraJAmrK9rkxWcZsuYXb+01J+CwW1WchuDzwe2lgJ6uliJYWI0080Nzc0WU0vtHZUCAY rbeFz6AXDlg9NC9bPuvNrqoT2idCOmKmmrFInw6H6DZ2Ew8G7mCVqLOdfkvM= X-Google-Smtp-Source: AGHT+IEYPeX0/JDZU2gXu5fZkKpTTFLubdS5ByzTo1zPFXqvhpbxq1nIWID2iHSofUykOKknq0DL0gMJcAfCLjzG4rPoTWJu6fOB Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:3584:b0:92f:1738:92a0 with SMTP id ca18e2360f4ac-93bd17e481dmr2099063739f.7.1760191984683; Sat, 11 Oct 2025 07:13:04 -0700 (PDT) Date: Sat, 11 Oct 2025 07:13:04 -0700 In-Reply-To: <20251011094107.16439-1-xuanzhuo@linux.alibaba.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68ea65f0.050a0220.91a22.01ce.GAE@google.com> Subject: [syzbot ci] Re: fixes two virtio-net related bugs. From: syzbot ci To: alvaro.karsz@solid-run.com, andrew@lunn.ch, davem@davemloft.net, edumazet@google.com, eperezma@redhat.com, hengqi@linux.alibaba.com, jasowang@redhat.com, jiri@resnulli.us, kuba@kernel.org, mst@redhat.com, netdev@vger.kernel.org, pabeni@redhat.com, virtualization@lists.linux.dev, willemb@google.com, xuanzhuo@linux.alibaba.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] fixes two virtio-net related bugs. https://lore.kernel.org/all/20251011094107.16439-1-xuanzhuo@linux.alibaba.com * [PATCH net v1 1/3] virtio-net: fix incorrect flags recording in big mode * [PATCH net v1 2/3] virtio-net: correct hdr_len handling for VIRTIO_NET_F_GUEST_HDRLEN * [PATCH net v1 3/3] virtio-net: correct hdr_len handling for tunnel gso and found the following issue: WARNING in virtio_net_hdr_from_skb Full report is available here: https://ci.syzbot.org/series/694015b3-a5d7-400b-a7c2-c9ee69c35027 *** WARNING in virtio_net_hdr_from_skb tree: net URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git base: 2c95a756e0cfc19af6d0b32b0c6cf3bada334998 arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/5e67ae6c-bfc6-42cc-ab94-ff0cde528221/config C repro: https://ci.syzbot.org/findings/39fb9135-9abf-418b-82a0-6478c7642a48/c_repro syz repro: https://ci.syzbot.org/findings/39fb9135-9abf-418b-82a0-6478c7642a48/syz_repro syz.0.17 uses obsolete (PF_INET,SOCK_PACKET) ------------[ cut here ]------------ WARNING: CPU: 1 PID: 5956 at ./include/linux/skbuff.h:3071 skb_transport_header include/linux/skbuff.h:3071 [inline] WARNING: CPU: 1 PID: 5956 at ./include/linux/skbuff.h:3071 tcp_hdr include/linux/tcp.h:26 [inline] WARNING: CPU: 1 PID: 5956 at ./include/linux/skbuff.h:3071 tcp_hdrlen include/linux/tcp.h:36 [inline] WARNING: CPU: 1 PID: 5956 at ./include/linux/skbuff.h:3071 virtio_net_hdr_from_skb+0x5e6/0x8d0 include/linux/virtio_net.h:226 Modules linked in: CPU: 1 UID: 0 PID: 5956 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:skb_transport_header include/linux/skbuff.h:3071 [inline] RIP: 0010:tcp_hdr include/linux/tcp.h:26 [inline] RIP: 0010:tcp_hdrlen include/linux/tcp.h:36 [inline] RIP: 0010:virtio_net_hdr_from_skb+0x5e6/0x8d0 include/linux/virtio_net.h:226 Code: 6f 01 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 d8 02 00 00 41 c6 45 00 05 66 41 bf 08 00 e9 2c fd ff ff e8 2b 33 a8 f7 90 <0f> 0b 90 e9 f4 fb ff ff e8 1d 33 a8 f7 90 0f 0b 90 e9 b7 fc ff ff RSP: 0018:ffffc90003777228 EFLAGS: 00010293 RAX: ffffffff8a16e845 RBX: ffff8881763f4fd0 RCX: ffff888106388000 RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff RBP: 000000000000ffff R08: ffff88817517f059 R09: 0000000000000000 R10: ffff88817517f050 R11: ffffed102ea2fe0c R12: ffff88816a55a498 R13: ffff8881763f4fb6 R14: ffff8881763f4f00 R15: 1ffff1102ec7e9f6 FS: 0000555585886500(0000) GS:ffff8882a9d3b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000010000 CR3: 00000001128ba000 CR4: 00000000000006f0 Call Trace: tpacket_rcv+0x1527/0x31c0 net/packet/af_packet.c:2362 deliver_skb net/core/dev.c:2472 [inline] deliver_ptype_list_skb net/core/dev.c:2487 [inline] __netif_receive_skb_core+0x3465/0x4380 net/core/dev.c:6023 __netif_receive_skb_one_core net/core/dev.c:6077 [inline] __netif_receive_skb+0x72/0x380 net/core/dev.c:6192 netif_receive_skb_internal net/core/dev.c:6278 [inline] netif_receive_skb+0x1cb/0x790 net/core/dev.c:6337 tun_rx_batched+0x1b9/0x730 drivers/net/tun.c:1485 tun_get_user+0x2b65/0x3e90 drivers/net/tun.c:1953 tun_chr_write_iter+0x113/0x200 drivers/net/tun.c:1999 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c9/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd130b8eec9 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:00007ffcdba8f558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fd130de5fa0 RCX: 00007fd130b8eec9 RDX: 000000000000fdef RSI: 00002000000002c0 RDI: 0000000000000003 RBP: 00007fd130c11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd130de5fa0 R14: 00007fd130de5fa0 R15: 0000000000000003 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.