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| author | Kees Cook <keescook@chromium.org> | 2012-08-27 20:38:13 +0200 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2012-09-07 17:06:14 +0200 |
| commit | 2e4930eb7c8fb20a39dfb5f8a8f80402710dcea8 (patch) | |
| tree | 01e5e84032b2d7efe3441080e5ce1c484f696680 /fs/xattr.c | |
| parent | security: allow Yama to be unconditionally stacked (diff) | |
| download | linux-2e4930eb7c8fb20a39dfb5f8a8f80402710dcea8.tar.xz linux-2e4930eb7c8fb20a39dfb5f8a8f80402710dcea8.zip | |
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>
Diffstat (limited to 'fs/xattr.c')
0 files changed, 0 insertions, 0 deletions