From nobody Sat Oct 4 19:16:45 2025 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) (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 2FEC2281368 for ; Wed, 13 Aug 2025 16:31:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.69 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755102687; cv=none; b=Lg7/N9UaVITbFUEA9rYm4RRcZHXime1PmxU+KVB4hnhjgXxzpHN1TecULQ273c1HB6NV1h3CWuUBfgr5iD/6nbalOD0AUobpAAsM9C/6UeFNi1K9C0vBk/kYoLoStzZw6rQCRVstPpXSVhsL8+8pPGINmgotBg7bauFHgj0PmSY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755102687; c=relaxed/simple; bh=WfHSUQEY3ZJrnUPJmAiL0Ymo8VhyVozArfR/PvCIpA0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=ErjPbBnQFHQN2AQqGf2ZvbJmVXK8nJnK2zXTx/Yneun3lA/Wfr011012lzUjRdOCHcd9HLeaOb3NLT/ZXJ5TxRFnfOSOO5p+C3+eZc5iXTy6NUbYrt/Ywe19keyJeVbLkVTPCMB4o4UlNQjintvoIWT0e93eNfvtZqIUXQFpBLg= 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=209.85.166.69 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-f69.google.com with SMTP id ca18e2360f4ac-88432e64477so1554339f.3 for ; Wed, 13 Aug 2025 09:31:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755102685; x=1755707485; 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=h3v2PBlw8KMNjlaA5Jr0Slsgw7HOK1MZVmucbZxBQSY=; b=A1Sedy2z27hJYxBJ9TMxXACbBQCx8pz7mUDV0J8mipPd5z2jRlc5pDnY96Pfkuyxef vCH+RJLG3CHUgpwBOJs1dCGK2oMlx02RYa9v6e88h5ifamk+agGX5vjJBTcHBp+r+QP7 jf8GXwn14taJJXbQQHHOLu5CssJX5ZmLkdtCZXUHho+HSaxiWPp1zhlnyQLdZSIEpvGA 4qNnehfslzWKN+wFlMhI2PNAku1kaFDGyriKk4m+WSZm2jZN2AMvGCaAn5dB9OIU5fsB LnboK9q64q8yOrJIdPV8wFyCdJ7eRPg68tqeN8YkWHtPy4rLWTZpfM+OchgqdTs3NJac Bc9A== X-Gm-Message-State: AOJu0YxQM31unUZ0JNmNVObQrqd6u/+DRcoPJqsj1SuJmu/oCvE80nQT 7RZQi16xq7TJruFwf5aqSSvawnsuVGi/RpvtZWpTwldHAA2pa8tsGXXrxso0F5JLQsRRKgUa4nA 6Xz3pb+C2OIbNUKE4hlcPfdEA9PYTTZbN5cUwjvaH5N8GF+33HkAdNsH9H04= X-Google-Smtp-Source: AGHT+IEUYCz+//JqQ3XHe16BxK77aWOwwCT1SRTItHt+P9jmDk1uZza+1vSdXNDJW+lGCbqgnO9ACgn43tTEEI09LbnQdXQoDx8s Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2cc4:b0:884:1d69:f1a9 with SMTP id ca18e2360f4ac-8842963a7abmr720433739f.4.1755102685260; Wed, 13 Aug 2025 09:31:25 -0700 (PDT) Date: Wed, 13 Aug 2025 09:31:25 -0700 In-Reply-To: <689a3d92.050a0220.7f033.00ff.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <689cbddd.050a0220.7f033.0153.GAE@google.com> Subject: Forwarded: Re: [syzbot] [kvm?] [net?] [virt?] WARNING in virtio_transport_send_pkt_info From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Re: [syzbot] [kvm?] [net?] [virt?] WARNING in virtio_transport_sen= d_pkt_info Author: mst@redhat.com #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.g= it master diff --git a/net/core/datagram.c b/net/core/datagram.c index 94cc4705e91d..3b5695ad3714 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -686,6 +686,11 @@ int zerocopy_fill_skb_from_iter(struct sk_buff *skb, if (refs) page_ref_sub(last_head, refs); } + + /* Fail if we couldn't get all requested data, like linear copy does */ + if (length > 0) + return -EFAULT; + return 0; }