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authorHelge Deller <deller@gmx.de>2016-04-08 18:18:48 +0200
committerHelge Deller <deller@gmx.de>2016-04-08 22:14:04 +0200
commitef72f3110d8b19f4c098a0bff7ed7d11945e70c6 (patch)
tree42b3f7f407b9d875baaf36045f59fc0965d675ee /arch/parisc/lib/fixup.S
parentparisc: Avoid function pointers for kernel exception routines (diff)
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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>
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