Re: [PATCH v2 1/2] exec: add a flag for "reasonable" execveat() comm

"Eric W. Biederman" ebiederm@xmission.com writes:

Kees Cook kees@kernel.org writes:

...

I'm not super comfortable doing this regardless of bprm->fdpath; that seems like too many cases getting changed. Can we just leave it as depending on bprm->fdpath?

I was recommending that because I did not expect that there was any widespread usage of aliasing of binary names using symlinks.

I realized today that on debian there are many aliases of binaries created with the /etc/alternatives mechanism. So there is much wider exposure to problems than I would have supposed.

So I remove any objections to making the new code conditional on bprm->fdpath.

Eric