Kees Cook 2e4930eb7c Yama: handle 32-bit userspace prctl ...

When running a 64-bit kernel and receiving prctls from a 32-bit
userspace, the "-1" used as an unsigned long will end up being
misdetected. The kernel is looking for 0xffffffffffffffff instead of
0xffffffff. Since prctl lacks a distinct compat interface, Yama needs
to handle this translation itself. As such, support either value as
meaning PR_SET_PTRACER_ANY, to avoid breaking the ABI for 64-bit.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: John Johansen <john.johansen@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: James Morris <james.l.morris@oracle.com>

2012-09-08 01:06:14 +10:00

..

Kconfig

security: allow Yama to be unconditionally stacked

2012-09-05 14:12:31 -07:00

Makefile

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yama_lsm.c

Yama: handle 32-bit userspace prctl

2012-09-08 01:06:14 +10:00