exec: Use sane stack rlimit under secureexec

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For a secureexec, before memory layout selection has happened, reset the
stack rlimit to something sane to avoid the caller having control over
the resulting layouts.

$ ulimit -s
8192
$ ulimit -s unlimited
$ /bin/sh -c 'ulimit -s'
unlimited
$ sudo /bin/sh -c 'ulimit -s'
8192

Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Acked-by: Serge Hallyn <serge@hallyn.com>

...

This commit is contained in:

Kees Cook 2017-07-18 15:25:35 -07:00

parent 473d89639d

commit 64701dee41

1 changed files with 12 additions and 0 deletions

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fs/exec.c

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