Commit 1917f917 authored by Khem Raj's avatar Khem Raj Committed by Jiri Slaby

powerpc/ptrace: Fix out of bounds array access warning

commit 1e407ee3 upstream.

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: default avatarKhem 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: default avatarAaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent f1991d49
......@@ -376,7 +376,7 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset,
#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
offsetof(struct thread_struct, fpr[32]));
return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
......@@ -404,7 +404,7 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset,
return 0;
#else
BUILD_BUG_ON(offsetof(struct thread_struct, fpscr) !=
offsetof(struct thread_struct, TS_FPR(32)));
offsetof(struct thread_struct, fpr[32]));
return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
&target->thread.fpr, 0, -1);
......
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