From: Khem Raj <[email protected]>
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 <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Signed-off-by: Bruce Ashfield <[email protected]>
---
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 2e3d2bf..fdebd6b 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -376,7 +376,7 @@ 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);
@@ -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_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);
--
2.7.4
--
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