* Elimar Riesebieter <riese...@lxtec.de> [2016-08-06 18:39 +0200]: > Package: gcc-6 > Version: 6.1.1-11 > Severity: important > > > Hi all, > > building a 4.4 Kernel with gcc-6 fails on arch ppc. Build with gcc-5 works > fine. > Kernel 4.7 builds fine with gcc-6. The faillog:
Attached patch provided by [0] fixes the build. [0] https://bugzilla.kernel.org/show_bug.cgi?id=151651 Elimar -- .~. /V\ L I N U X /( )\ >Phear the Penguin< ^^-^^
From 1e407ee3b21f981140491d5b8a36422979ca246f Mon Sep 17 00:00:00 2001 From: Khem Raj <raj.k...@gmail.com> Date: Mon, 25 Apr 2016 09:19:17 -0700 Subject: [PATCH] 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.k...@gmail.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Michael Ellerman <m...@ellerman.id.au> Cc: Segher Boessenkool <seg...@kernel.crashing.org> Tested-by: Aaro Koskinen <aaro.koski...@iki.fi> Acked-by: Olof Johansson <o...@lixom.net> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> --- arch/powerpc/kernel/ptrace.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 30a03c0..060b140 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -377,7 +377,7 @@ static int fpr_get(struct task_struct *target, const struct user_regset *regset, #else BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) != - offsetof(struct thread_fp_state, fpr[32][0])); + offsetof(struct thread_fp_state, fpr[32])); return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &target->thread.fp_state, 0, -1); @@ -405,7 +405,7 @@ static int fpr_set(struct task_struct *target, const struct user_regset *regset, return 0; #else BUILD_BUG_ON(offsetof(struct thread_fp_state, fpscr) != - offsetof(struct thread_fp_state, fpr[32][0])); + offsetof(struct thread_fp_state, fpr[32])); return user_regset_copyin(&pos, &count, &kbuf, &ubuf, &target->thread.fp_state, 0, -1); -- 2.8.1
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