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On Wed, 2012-03-07 at 10:57 -0500, David Quigley wrote: > On 03/07/2012 10:15, Yao wrote: > > Hi, > > Lately I'm studying SELinux and got some questions which I want to be > > clear. > > > > (1)I know SELinux is based on Flask architecture and I know where the > > SS is, but I'm not sure > > where the OM locates, I guess the variable "security_ops" which > > belongs to LSM represents the OM, am I right? > > > > (2)the struct "selinux_ops" in file hooks.c is declared as "static", > > why not add "const" qualifier so that > > the it will be put in read-only data section in the kernel? > > > > (3)Is there any way to hack the SELinux, I mean, to disable it on the > > fly? For example, replace the policy db with a > > blank file so that any permission is allowed. Is it feasible? > > > > Regards, > > Yao > > So In order. > > I asked (1) when I first started as well and the answer I got was the > kernel itself is the object manager. You'll notice a bunch of security_ > calles through the kernel. These are the enforcement points which query > the security server through the selinux specific hooks behind the LSM > interface. In general, the "object manager" is the component that implements the object abstraction and operations and is responsible for enforcement of the policy decisions. The kernel can either be viewed as a single object manager or as a collection of object managers (e.g. the process management subsystem, the vfs and filesystem implementations, the networking subsystem, the ipc subsystem, ...). In the case of the Flask microkernel-based OS, the various subsystems were in fact separate tasks running on the microkernel. -- Stephen Smalley National Security Agency -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@xxxxxxxxxxxxx with the words "unsubscribe selinux" without quotes as the message.
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