Commit c1a6bff2 authored Mar 11, 2015 by Petr Matousek Committed by Marcelo Tosatti Mar 12, 2015

kvm: x86: i8259: return initialized data on invalid-size read



If data is read from PIC with invalid access size, the return data stays
uninitialized even though success is returned.

Fix this by always initializing the data.

Signed-off-by: Petr Matousek <pmatouse@redhat.com>
Reported-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

parent dc9be0fa

arch/x86/kvm/i8259.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -507,6 +507,7 @@ static int picdev_read(struct kvm_pic *s,
		return -EOPNOTSUPP;

		if (len != 1) {
		memset(val, 0, len);
		pr_pic_unimpl("non byte read\n");
		return 0;
		}