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Fix CVE-2017-8380:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8380
Patch copied from upstream source repository:
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=24dfa9fa2f90a95ac33c7372de4f4f2c8a2c141f
From 24dfa9fa2f90a95ac33c7372de4f4f2c8a2c141f Mon Sep 17 00:00:00 2001
From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Mon, 24 Apr 2017 17:36:34 +0530
Subject: [PATCH] scsi: avoid an off-by-one error in megasas_mmio_write
While reading magic sequence(MFI_SEQ) in megasas_mmio_write,
an off-by-one error could occur as 's->adp_reset' index is not
reset after reading the last sequence.
Reported-by: YY Z <bigbird475958471@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20170424120634.12268-1-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
hw/scsi/megasas.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 84b8caf901..804122ab05 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -2138,15 +2138,15 @@ static void megasas_mmio_write(void *opaque, hwaddr addr,
case MFI_SEQ:
trace_megasas_mmio_writel("MFI_SEQ", val);
/* Magic sequence to start ADP reset */
- if (adp_reset_seq[s->adp_reset] == val) {
- s->adp_reset++;
+ if (adp_reset_seq[s->adp_reset++] == val) {
+ if (s->adp_reset == 6) {
+ s->adp_reset = 0;
+ s->diag = MFI_DIAG_WRITE_ENABLE;
+ }
} else {
s->adp_reset = 0;
s->diag = 0;
}
- if (s->adp_reset == 6) {
- s->diag = MFI_DIAG_WRITE_ENABLE;
- }
break;
case MFI_DIAG:
trace_megasas_mmio_writel("MFI_DIAG", val);
--
2.13.0
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