tree 42b3f7f407b9d875baaf36045f59fc0965d675ee
parent e3893027a300927049efc1572f852201eb785142
author Helge Deller <deller@gmx.de> 1460132328 +0200
committer Helge Deller <deller@gmx.de> 1460146444 +0200

parisc: Fix kernel crash with reversed copy_from_user()

The kernel module testcase (lib/test_user_copy.c) exhibited a kernel
crash on parisc if the parameters for copy_from_user were reversed
("illegal reversed copy_to_user" testcase).

Fix this potential crash by checking the fault handler if the faulting
address is in the exception table.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>