tree fee3f3b3448d41419a6e261eec6e59d1f7101fca
parent fbc877cd08e55f794bdd0d0363bce5147629ef16
author Kees Cook <keescook@chromium.org> 1499453849 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1500615742 +0200

exec: Limit arg stack to at most 75% of _STK_LIM

commit da029c11e6b12f321f36dac8771e833b65cec962 upstream.

To avoid pathological stack usage or the need to special-case setuid
execs, just limit all arg stack usage to at most 75% of _STK_LIM (6MB).

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>