diff options
| author | Kees Cook <keescook@chromium.org> | 2012-08-27 11:38:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-07 08:39:34 -0700 |
| commit | 762083a99afd67cc2661e3a7de97abd6ab657dce (patch) | |
| tree | ac67ed44c23a870f7b4b1276f89a4acf7b5a9915 /net/lapb/lapb_timer.c | |
| parent | 9c9cc09d08b083a38a341195597c6809113454c7 (diff) | |
Yama: handle 32-bit userspace prctl
commit 2e4930eb7c8fb20a39dfb5f8a8f80402710dcea8 upstream.
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>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions