[PATCH v2 7/8] exec: Generic execfd support
Eric W. Biederman
ebiederm at xmission.com
Tue May 19 20:20:27 UTC 2020
Linus Torvalds <torvalds at linux-foundation.org> writes:
> On Tue, May 19, 2020 at 12:46 PM Kees Cook <keescook at chromium.org> wrote:
>> Though frankly, I wonder if interp_flags could just be removed in favor
>> of two new bit members, especially since interp_data is gone:
> Yeah, I think that might be a good cleanup - but please keep it as a
> separate thing at the end of the series (or maybe the beginning)
With a little care we can replace setting BINPRM_FLAGS_ENFORCE_NONDUMP
and clearing bprm->mm->dumpable.
Which is the direction I have been looking.
Now that I think about it I believe that the loop in exec_binprm should
be clearing BINPRM_FLAGS_PATH_INACCESSIBLE as it is only relevant to
fexec/execveat with a close on exec file descriptor.
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