[OpenWrt-Devel] [PATCH procd v2 0/5] jail work

John Crispin blogic at openwrt.org
Wed Aug 26 09:48:23 EDT 2015

On 26/08/2015 01:00, Etienne CHAMPETIER wrote:
> This patch series rework a bit ujail,
> and add capabilities support to it


> Seccomp filter are very powerful but not totally generic,
> each arch can have different set of syscalls,
> each libc can use different syscall for the same function,
> and seccomp isn't supported on all arch.
> Capabilities are more high level, but still can restrict
> jail to a sane minimum of privileges.

> Patch 4 is a bit big and i can split it if needed, just tell me how

will have a closer look next few days

there seem to be a way to escape from the rebind mount jail that QCA has
found and i have not had the time yet to finish my jailfs module. it
runs and loads, i can do mounts and access files inside them using
normal shell calls. however if is point a jail instance at the
mountpoint it oops horribly. i suspect that i am either using vfs wrong
or am missing locking/ref-counting somewhere. i'll throw the code onto
github later today or tomorrow and post the link. maybe someone with
more knowledge of vfs can help fix it.
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