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George Dunlap
ce2f426058
Limit the ability of a potentially compromised QEMU to consume system resources. Key limits: - RLIMIT_FSIZE (file size): 256KiB - RLIMIT_NPROC (after uid changes to a unique uid) Probably unnecessary limits but why not: - RLIMIT_CORE: 0 - RLIMIT_MSGQUEUE: 0 - RLIMIT_LOCKS: 0 - RLIMIT_MEMLOCK: 0 NB that we do not yet set RLIMIT_AS (total virtual memory) or RLIMIT_NOFILES (number of open files), since these require more care and/or more coordination with QEMU to implement. Suggested-by: Ross Lagerwall <ross.lagerwall@citrix.com> Signed-off-by: George Dunlap <george.dunlap@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> --- Changes since v4: - Put global headers before local headers (sugg by Paul) - Move #undif inside the braces (sugg by Paul) Changes since v3: - Align RLIMIT_ENTRY list for easier reading - Fix wrong format string specifier - Get rid of some trailing whitespace Changes since v2: - Use a macro to define rlimit entries - Use RLIMIT_NLIMITS as an end-of-list marker, rather than -1 - Various style clean-ups CC: Ian Jackson <ian.jackson@citrix.com> CC: Wei Liu <wei.liu2@citrix.com> CC: Anthony Perard <anthony.perard@citrix.com>
xen-bugtool =========== The xen-bugtool command line application will collate the Xen dmesg output, details of the hardware configuration of your machine, information about the build of Xen that you are using, plus, if you allow it, various logs. The information collated can either be posted to a Xen Bugzilla bug (this bug must already exist in the system, and you must be a registered user there), or it can be saved as a .tar.bz2 for sending or archiving. The collated logs may contain private information, and if you are at all worried about that, you should not use this tool, or you should explicitly exclude those logs from the archive. xen-bugtool is wholly interactive, so simply run it, and answer the questions.