diff options
| -rw-r--r-- | arch/blackfin/kernel/ptrace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c index 7e1f762b670..140bf00e997 100644 --- a/arch/blackfin/kernel/ptrace.c +++ b/arch/blackfin/kernel/ptrace.c @@ -160,6 +160,10 @@ static inline int is_user_addr_valid(struct task_struct *child, struct vm_list_struct *vml; struct sram_list_struct *sraml; + /* overflow */ + if (start + len < start) + return -EIO; + for (vml = child->mm->context.vmlist; vml; vml = vml->next) if (start >= vml->vma->vm_start && start + len < vml->vma->vm_end) return 0; |