Blackfin arch: have is_user_addr_valid() check for overflows (like when address is -1) (3c08f1d1) · Commits · e / devices / android_kernel_teracube_2e

arch/blackfin/kernel/ptrace.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;