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Ran 02 Aug 2016 11:28AM UTC

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Build # 483

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travis-ci

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xemul

Commit Message

cr-exec: initialize kdat.{task_size, has_compat_sigreturn} on criu exec

For `criu exec` we are searching for a place for syscall injection.
While searching for a VMA with PROT_EXEC and with needed size,
we check that VMA is lower than task_size.
The callpath for it is:
cr_exec => parasite_prep_ctl => get_vma_by_ip

Firstly, I thought to omit kdat.task_size checking if it's not inited:
> if (vma_area->e->start >= kdat.task_size && kdat.task_size)
but I think it's a hack then a proper solution.
Besides, this code still can choose VMA over task_size on ARM
and try to inject syscall there (IIRC, ARM has kernel-mapped
VMA in that area).

So, lets init kdat.task_size for `criu exec`.
Also lets init kdat.has_compat_sigreturn so we could exec into
compatible applications.

Cc: Christopher Covington <cov@codeaurora.org>
Cc: Andrew Vagin <avagin@virtuozzo.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Reviewed-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

Run Details

Jobs

ID	Job ID	Ran
2	483.2 (TR_ARCH=x86_64)	02 Aug 2016 11:28AM UTC	Travis Job 483.2
3	483.3 (TR_ARCH=armv7hf)	02 Aug 2016 11:41AM UTC	Travis Job 483.3
4	483.4 (TR_ARCH=aarch64)	02 Aug 2016 11:37AM UTC	Travis Job 483.4
5	483.5 (TR_ARCH=ppc64le)	02 Aug 2016 11:40AM UTC	Travis Job 483.5

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