Commit 64168f42 authored Nov 15, 2016 by Aneesh Kumar K.V Committed by Michael Ellerman Nov 22, 2016

powerpc/mm/coproc: Handle bad address on coproc slb fault



VSID 0 is bad address. Don't create slb entries on coproc fault for
bad address

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Reviewed-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 6654c936

arch/powerpc/mm/copro_fault.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -134,6 +134,9 @@ int copro_calculate_slb(struct mm_struct mm, u64 ea, struct copro_slb slb)
	pr_debug("%s: invalid region access at %016llx\n", __func__, ea);		pr_debug("%s: invalid region access at %016llx\n", __func__, ea);
	return 1;		return 1;
	}		}
			/* Bad address */
			if (!vsid)
			return 1;

	vsid = (vsid << slb_vsid_shift(ssize)) \| vsidkey;		vsid = (vsid << slb_vsid_shift(ssize)) \| vsidkey;