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Open Source and information security mailing list archives
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Date: Tue, 1 Apr 2014 21:22:35 +0100 From: One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk> To: Andy Lutomirski <luto@...capital.net> Cc: Jim Lieb <jlieb@...asas.com>, Jeff Layton <jlayton@...hat.com>, "Serge E. Hallyn" <serge@...onical.com>, bfields@...hat.com, "Theodore Ts'o" <tytso@....edu>, Linux FS Devel <linux-fsdevel@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, LSM List <linux-security-module@...r.kernel.org>, "Eric W. Biederman" <ebiederm@...ssion.com>, Kees Cook <keescook@...omium.org> Subject: Re: Thoughts on credential switching > Do we include credfd fds sitting in Unix sockets? Ouch > Hmm. What if we had initial_creds and creds, and initial_creds never > changed unless explicitly requested. There wouldn't be any way to > revert to initial_creds, but may_ptrace would check initial_creds > *and* creds. This is a little hacky, and it might break Android (I'm > not really sure how the zygote thing works), but it could do the > trick. That mirros setfsuid and seteuid type behaviour so seems sensible enough. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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