Suraj Jitindar Singh a9ce57d571 powerpc: Add barrier_nospec to raw_copy_in_user() ...

commit 6fbcdd5909 upstream.

Commit ddf35cf376 ("powerpc: Use barrier_nospec in copy_from_user()")
Added barrier_nospec before loading from user-controlled pointers. The
intention was to order the load from the potentially user-controlled
pointer vs a previous branch based on an access_ok() check or similar.

In order to achieve the same result, add a barrier_nospec to the
raw_copy_in_user() function before loading from such a user-controlled
pointer.

Fixes: ddf35cf376 ("powerpc: Use barrier_nospec in copy_from_user()")
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2019-09-19 09:11:01 +02:00

..

asm

powerpc: Add barrier_nospec to raw_copy_in_user()

2019-09-19 09:11:01 +02:00

uapi/asm

treewide: Add SPDX license identifier - Kbuild

2019-05-30 11:32:33 -07:00