From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au,
Frederic Barrat <fbarrat@linux.vnet.ibm.com>,
imunsie@au1.ibm.com
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH] powerpc/mm/coproc: Handle bad address on coproc slb fault
Date: Tue, 15 Nov 2016 20:36:06 +0530 [thread overview]
Message-ID: <20161115150606.14090-1-aneesh.kumar@linux.vnet.ibm.com> (raw)
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>
---
NOTE: note tested
arch/powerpc/mm/copro_fault.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c
index 362954f98029..aaa7ec6788b9 100644
--- a/arch/powerpc/mm/copro_fault.c
+++ b/arch/powerpc/mm/copro_fault.c
@@ -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);
return 1;
}
+ /* Bad address */
+ if (!vsid)
+ return 1;
vsid = (vsid << slb_vsid_shift(ssize)) | vsidkey;
--
2.10.2
next reply other threads:[~2016-11-15 15:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-15 15:06 Aneesh Kumar K.V [this message]
2016-11-16 0:08 ` [PATCH] powerpc/mm/coproc: Handle bad address on coproc slb fault Balbir Singh
2016-11-16 1:11 ` Ian Munsie
2016-11-25 0:04 ` Michael Ellerman
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