On Fri, Aug 3, 2012 at 12:53 PM, Daniel P. Berrange <berrange@xxxxxxxxxx> wrote: > From: "Daniel P. Berrange" <berrange@xxxxxxxxxx> > > The following commit > > commit cf3f89214ef6a33fad60856bc5ffd7bb2fc4709b > Author: Daniel Lezcano <daniel.lezcano@xxxxxxx> > Date: Wed Mar 28 14:42:51 2012 -0700 > > pidns: add reboot_pid_ns() to handle the reboot syscall > > introduced custom handling of the reboot() syscall when invoked > from a non-initial PID namespace. The intent was that a process > in a container can be allowed to keep CAP_SYS_BOOT and execute > reboot() to shutdown/reboot just their private container, rather > than the host. > > Unfortunately the kexec_load() syscall also relies on the > CAP_SYS_BOOT capability. So by allowing a container to keep > this capability to safely invoke reboot(), they mistakenly > also gain the ability to use kexec_load(). The solution is > to make kexec_load() return -EPERM if invoked from a PID > namespace that is not the initial namespace > > Signed-off-by: Daniel P. Berrange <berrange@xxxxxxxxxx> > Cc: Serge Hallyn <serge.hallyn@xxxxxxxxxxxxx> > Cc: Daniel Lezcano <daniel.lezcano@xxxxxxx> > Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx> > Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> > Cc: Tejun Heo <tj@xxxxxxxxxx> > Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Why is this commit not marked for -stable? -- Thanks, //richard _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
