File 0067-dma-rc4030-limit-interval-timer-rel.patch of Package qemu

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File 0067-dma-rc4030-limit-interval-timer-rel.patch of Package qemu (Revision 4c737a4284efbc9eba72c4ce4e33ff05)

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From 491b61b48cef566df12b5b2191111febd95d1a5c Mon Sep 17 00:00:00 2001
From: P J P <ppandit@redhat.com>
Date: Mon, 31 Oct 2016 15:55:14 -0600
Subject: [PATCH] dma: rc4030: limit interval timer reload value

The JAZZ RC4030 chipset emulator has a periodic timer and
associated interval reload register. The reload value is used
as divider when computing timer's next tick value. If reload
value is large, it could lead to divide by zero error. Limit
the interval reload value to avoid it.

Reported-by: Huawei PSIRT <psirt@huawei.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
[BR: CVE-2016-8667 BSC#1004702]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/dma/rc4030.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/dma/rc4030.c b/hw/dma/rc4030.c
index 2f2576f..c1b4997 100644
--- a/hw/dma/rc4030.c
+++ b/hw/dma/rc4030.c
@@ -460,7 +460,7 @@ static void rc4030_write(void *opaque, hwaddr addr, uint64_t data,
         break;
     /* Interval timer reload */
     case 0x0228:
-        s->itr = val;
+        s->itr = val & 0x01FF;
         qemu_irq_lower(s->timer_irq);
         set_next_tick(s);
         break;

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File 0067-dma-rc4030-limit-interval-timer-rel.patch of Package qemu (Revision 4c737a4284efbc9eba72c4ce4e33ff05)

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