Merge branch 'regset' (PTRACE_SETREGSET data leakage)

[platform/kernel/linux-rpi.git] / arch / mips / kernel / ptrace.c

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 3396012..6931fe7 100644 (file)
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -456,7 +456,8 @@ static int fpr_set(struct task_struct *target,
                                          &target->thread.fpu,
                                          0, sizeof(elf_fpregset_t));
 
-       for (i = 0; i < NUM_FPU_REGS; i++) {
+       BUILD_BUG_ON(sizeof(fpr_val) != sizeof(elf_fpreg_t));
+       for (i = 0; i < NUM_FPU_REGS && count >= sizeof(elf_fpreg_t); i++) {
                err = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
                                         &fpr_val, i * sizeof(elf_fpreg_t),
                                         (i + 1) * sizeof(elf_fpreg_t));