From: Ian Jackson <ian.jackson@eu.citrix.com>
To: xen-devel@lists.xenproject.org
Cc: "Wei Liu" <wei.liu2@citrix.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [PATCH for-4.12 0/4] tools: Internal fd access, etc.
Date: Mon, 14 May 2018 18:08:55 +0100 [thread overview]
Message-ID: <1526317739-17572-1-git-send-email-ian.jackson@eu.citrix.com> (raw)
I am working on auditing whether deprvileging qemu has actually
worked. The approach I have chosen is to fish the descriptors out of
qemu (by using debugging facilities), and try to make hypercalls
etc. using them.
To take making a hypercall as an example: this is not easily done
without libxc. So I need to make libxc make a hypercall with a
different fd - actually, a different open-file. I do this by using
dup2 to overwrite libxc's fd with the one stolen from qemu. That
means I need to know libxc's fd number. Hence the middle two patches
in this series.
Also, I drop some obsolete declarations and improve an error message.
I doubt this is 4.11 material. qemu depriv is not covered by support
in 4.11 anyway. In 4.12 I want it to be supported, and, therefore,
tested and audited. If it becomes fully supported there, it might be
worth backporting some of these patches.
Thanks,
Ian.
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next reply other threads:[~2018-05-14 17:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-14 17:08 Ian Jackson [this message]
2018-05-14 17:08 ` [PATCH 1/4] libxc: Drop declarations of osdep_privcmd_open and _close Ian Jackson
2018-05-15 8:37 ` Wei Liu
2018-05-15 8:49 ` Roger Pau Monné
2018-05-14 17:08 ` [PATCH 2/4] libxc: Provide access to internal handles Ian Jackson
2018-05-15 8:37 ` Wei Liu
2018-05-15 8:58 ` Roger Pau Monné
2018-06-11 13:49 ` Ian Jackson
2018-05-14 17:08 ` [PATCH 3/4] tools: xencall, xengnttab, xengntshr: Provide access to internal fds Ian Jackson
2018-05-14 17:18 ` Andrew Cooper
2018-05-15 11:10 ` Ian Jackson
2018-05-14 17:08 ` [PATCH 4/4] libxl: Provide better error message when qemu restrict user not found Ian Jackson
2018-05-15 8:38 ` Wei Liu
2018-05-15 9:02 ` Roger Pau Monné
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