Messages in this thread | | | Date | Sun, 04 Nov 2007 22:56:07 -0800 | From | Andrew Morgan <> | Subject | Re: Linux Security *Module* Framework (Was: LSM conversion to static interface) |
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Peter Dolding wrote: > On 11/1/07, Casey Schaufler <casey@schaufler-ca.com> wrote: >> --- Peter Dolding <oiaohm@gmail.com> wrote: >> Posix capabilities predate SELinux. SELinux is not interested in >> Posix capabilities. >> >>> But no IBM had to do it. >> Err, no. It was done by Andrew Morgan back in the dark ages. >> Why on earth do you think IBM did it? > > Posix file capabilities the option to replace SUID bit with something > more security safe only handing out segments of root power instead of > the complete box and dice like SUID. Even different on a user by user > base. > > Posix capabilites is what Posix file capabilities is based on. Yes I > know the words appear close. The word file is important. Please read > Website. http://www.ibm.com/developerworks/linux/library/l-posixcap.html
For the record, I think you are both right. I took a stab at it back when Casey and I first met:
ftp://ftp.kernel.org/pub/linux/libs/security/linux-privs/old/kernel-2.4-fcap/README
all that stuff worked fine it was just a bit ahead of its time...
- From memory, at that point in time "extended attributes" were an external patch, and having some trouble getting merged. My sense was that EA was a pre-requisite and I was happy to wait for that support to become integrated before pushing my file capability support.
In the midst of all this LSM emerged as a reaction to Linus' clear unhappiness about all extensions security. I didn't have the time to participate in the LSM, and my work sat in the form of these patches.
SELinux at that time existed as a separate infrastructure, and evidently did have the time to embrace LSM.
> IBM coders worked and got it into the main line really recently to > provide at least some way to avoid fault of SUID of course it could
[...]
So, yes, IBM (Serge) deserve full credit for starting over, and getting it merged...
Cheers
Andrew -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux)
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