diff options
| author | Kees Cook <keescook@chromium.org> | 2017-02-13 11:25:26 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-14 13:16:27 +0200 |
| commit | 51ff10e72fc2448f66ca5c4cec81c4631c8aad30 (patch) | |
| tree | bab1727eaee93cd3f4e175f550394f1c74dcd621 /mm/msync.c | |
| parent | 746d48934f5194232bc572b2e90f2e5490ca622f (diff) | |
usercopy: Adjust tests to deal with SMAP/PAN
commit f5f893c57e37ca730808cb2eee3820abd05e7507 upstream.
Under SMAP/PAN/etc, we cannot write directly to userspace memory, so
this rearranges the test bytes to get written through copy_to_user().
Additionally drops the bad copy_from_user() test that would trigger a
memcpy() against userspace on failure.
[arnd: the test module was added in 3.14, and this backported patch
should apply cleanly on all version from 3.14 to 4.10.
The original patch was in 4.11 on top of a context change
I saw the bug triggered with kselftest on a 4.4.y stable kernel]
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/msync.c')
0 files changed, 0 insertions, 0 deletions