From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 5CA7736AF2 for ; Mon, 3 Jun 2024 05:42:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717393366; cv=none; b=lbRQhkyYn+qj7Hvdp5QSFbz1wPKaIdS/B01Yw5dKovgJfLSkfvoDM09Rg+B5Vyf9xxm2WR28ZxMIt1K9SZJBcGZSohyo2tymVANucKC95GDToIrjc66ZboRHAsbu8ww7LfC/PoHqJTzP+gRupBmgUoWxX/Splhwv5pneAAS4UA0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717393366; c=relaxed/simple; bh=61ixqgz3TnH85wNXtukmWpuOwKhxoFWTmei/1VVi39A=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=Oqze5Xy/pw+OBTtFK4ukiaU9CeOhE/ppJI55gGa4kZtvwqKlhwWeYALZFS+I3YpElbYfm1tSWq8seO+7SfgWZFYFhOWnArEJp5Z2T//yfSNXR8w8LLOMLru3qc4S2WQFbZPS7VGT0nt57ra0/8XUX7DwChgabNRCdDdrkvQZV2g= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-7e94cac3c71so534163639f.2 for ; Sun, 02 Jun 2024 22:42:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717393364; x=1717998164; 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=TPn5AQnCCjUUvOrlZSBRdqFWxupWhkgajfe/IMHh0YA=; b=Y3AdaMOwglb4gBiGY9towsB+mdRiILuzZVK6mh4HTAm1kZKvk8xT2fRZuODtS0rrHx b9pu/UfdEMPbL1P01wAyoiEC8ScsW4XUr8/PtLXjooIZI+VxUG/sc9Q3eY3OhLtkewK3 bN35CssbriEBDBpGKl3PMDj5nkTd48rlv7ZBVzQIeJEOLpV2YnlB2mo1zQe95WlubA0r CobZVBkUic2n3VzLhSB99FbJc+N7vLnh787Q4KSgm+9OrU+Pz1KnRxmSwhWCcpYThDhZ 9zAd2T5gZ90ZpM+7kmnXXifoNs90dOdBiLaUEQ2ynmcFNulVNzjheX+G+twJKbeimztO EU2Q== X-Gm-Message-State: AOJu0YwTFzgDgbuAZ/1S1FMf/PqClC8dQ040GYjIambGHCv9GEM5dwDb /PLcxkmyFKBtLQYaDoLIPuRekf3Ump1TGEQsRqCXYIWyU6+HEMdnsqnG0LHZdTf+LbrTi6Yctck +EbW+h0Pfqv8/9s6qerek58EA9Dmro9oe6HMlAV2bMNeXGxpsFLSqUFA= X-Google-Smtp-Source: AGHT+IETHfCcMvQ+3IUvj/Tl2pcQEUqPED5RYZb3jJ66UsTNw7v4P+1Uyxi8TXZmxRQAkLM6RbwDWdqVSCaavPH1aL7oD1PNgOVN Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:6d1a:b0:7ea:ffcd:c856 with SMTP id ca18e2360f4ac-7eaffeffeaamr35844339f.2.1717393364518; Sun, 02 Jun 2024 22:42:44 -0700 (PDT) Date: Sun, 02 Jun 2024 22:42:44 -0700 In-Reply-To: <000000000000a82e6e0619e9c192@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000006e98250619f5cd99@google.com> Subject: Re: [syzbot] Fix use-after-free in udmabuf_create From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: Fix use-after-free in udmabuf_create Author: nightu.pwn@gmail.com please test file uaf in udmabuf_create #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git 0e1980c40b6e --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -382,6 +382,7 @@ static long udmabuf_create(struct miscdevice *device, kfree(folios); fput(memfd); + memfd = NULL; } flags = head->flags & UDMABUF_FLAGS_CLOEXEC ? O_CLOEXEC : 0;