powerpc/ptrace: Fix out of bounds array access warning
authorKhem Raj <raj.khem@gmail.com>
Mon, 25 Apr 2016 16:19:17 +0000 (09:19 -0700)
committerMichael Ellerman <mpe@ellerman.id.au>
Mon, 6 Jun 2016 00:48:07 +0000 (10:48 +1000)
commit1e407ee3b21f981140491d5b8a36422979ca246f
tree79de91450d04e0ab42c4c69c4e23b96dfeb3f4d6
parent7cc851039d643a2ee7df4d18177150f2c3a484f5
powerpc/ptrace: Fix out of bounds array access warning

gcc-6 correctly warns about a out of bounds access

arch/powerpc/kernel/ptrace.c:407:24: warning: index 32 denotes an offset greater than size of 'u64[32][1] {aka long long unsigned int[32][1]}' [-Warray-bounds]
        offsetof(struct thread_fp_state, fpr[32][0]));
                        ^

check the end of array instead of beginning of next element to fix this

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/ptrace.c