From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 98A3922F74B for ; Mon, 23 Jun 2025 08:50:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750668645; cv=none; b=bBwYrazwqWvKYTDwthhp65i86E/9WrKgw86Rtkd18AxApH/RKPsllNDoFYuygNeCmAO4Rkh1vmUaTER+gSztwLrV+eN+mINvfAGjuSYVwAKMNzUt5/2rcK0suPYEiJFhwE7MHDDpriFbFfaD3wOHGQnymb7LGfC4YDRRvisGE1s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750668645; c=relaxed/simple; bh=4YaijbhSu8B0AGBXcXAD2zOe37QdUotg4qUZE4CIqyo=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=jdDSilTWVtq0C8Ej51MxgL6eru1dvLH9pk6hB4QwXsCMbGvlRy/bejIkp2kFk4Vtk27TIG4hULHG6ZXN9Y06ya2eAsjATt27Blim+iWPwYUkOHbsdK2RVHSMN6PDvgeytCpQ+yJWWHv8BghFvo6JfxmcnzEC3976uTnM5GQuXko= 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=209.85.166.199 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-f199.google.com with SMTP id e9e14a558f8ab-3ddd03db24dso35332835ab.2 for ; Mon, 23 Jun 2025 01:50:43 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750668643; x=1751273443; 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=34ldYHHob+9En/WL6nat24QJCBcVNGF+83H/uFKv9oM=; b=GEpdw9reakADPq1aCTmv8TmdIyCi/5z7C8OqiomtPd8x1Es8byAmGAWZXF6I5cEUA7 /BIGeaMq8rxO+e666Dzopa3Rp2+u5qN2PAnEc7ZVTFf11lFY+N1Ak0HU+0rZfSqxjk8b rdTnEhttYxW3rDwV+adfV4fciNfjZQNN3iotQabX8EGbzDqD8f7nld+oh+cZqBs8Hhba uujdVuN/cLPD52xcAOCZdS76k47ByXMF4sOUk6HX2p4lpm+ToVYazzc8YCZSJ5BempIB KwO4NuquLIB9TyJgskgL2ew9JFwzXq8/+f9UltPO3jBRd5Sa0U+jsbPW3BiXntl3Cw9v nIKA== X-Gm-Message-State: AOJu0YwPoLDOVf5Rnn0Uazi+WrYi6YwmmPJ9mCBTdpsmNtX3Br1yU+0b bDoIYPtmn8fPbMtw6tIexObD5rgoPqpJyYTJ7cby1r4HkgTrplyadtGVlnOa8EdJ5fl7V0/gBDq im9BnhYXVOhKL97VxiEFJBQkrUzK+S8Wyvian4uf5yNYQIT4u+Ypjg7yPsLc= X-Google-Smtp-Source: AGHT+IHBZon5hMxFnLrwoIptmH1v3GN6tu9FG2k8qVP4HgdwUbebTjlxHcEY2mnaSfu3E4NR0m46o5qiL8cQZAwP/xu2wq0cP1B4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3499:b0:3de:119f:5261 with SMTP id e9e14a558f8ab-3de38c1c019mr170616185ab.3.1750668642801; Mon, 23 Jun 2025 01:50:42 -0700 (PDT) Date: Mon, 23 Jun 2025 01:50:42 -0700 In-Reply-To: <6854a3e6.a00a0220.137b3.0022.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68591562.050a0220.d71a0.0005.GAE@google.com> Subject: Re: [syzbot] Re: [syzbot] [kernel?] KMSAN: kernel-infoleak in vmci_host_unlocked_ioctl (3) 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: Re: [syzbot] [kernel?] KMSAN: kernel-infoleak in vmci_host_unlocked_ioctl (3) Author: lizhi.xu@windriver.com #syz test diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index b64944367ac5..30c60a00d3ae 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -426,8 +426,12 @@ static int vmci_host_do_receive_datagram(struct vmci_host_dev *vmci_host_dev, return -EINVAL; } - if (copy_from_user(&recv_info, uptr, sizeof(recv_info))) - return -EFAULT; + mutex_lock(&vmci_host_dev->lock); + + if (copy_from_user(&recv_info, uptr, sizeof(recv_info))) { + retval = -EFAULT; + goto out; + } size = recv_info.len; recv_info.result = vmci_ctx_dequeue_datagram(vmci_host_dev->context, @@ -437,11 +441,17 @@ static int vmci_host_do_receive_datagram(struct vmci_host_dev *vmci_host_dev, void __user *ubuf = (void __user *)(uintptr_t)recv_info.addr; retval = copy_to_user(ubuf, dg, VMCI_DG_SIZE(dg)); kfree(dg); - if (retval != 0) - return -EFAULT; + if (retval != 0) { + retval = -EFAULT; + goto out; + } } - return copy_to_user(uptr, &recv_info, sizeof(recv_info)) ? -EFAULT : 0; + retval = copy_to_user(uptr, &recv_info, sizeof(recv_info)) ? -EFAULT : 0; + +out: + mutex_unlock(&vmci_host_dev->lock); + return retval; } static int vmci_host_do_alloc_queuepair(struct vmci_host_dev *vmci_host_dev,