File CVE-2016-8667-qemut-dma-rc4030-divide-by-zero-e... of Package xen

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File CVE-2016-8667-qemut-dma-rc4030-divide-by-zero-error-in-set_next_tick.patch of Package xen (Revision 18d9f567aa76ad786ec2ce93bd88d638)

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References: bsc#1005004 CVE-2016-8667

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 <address@hidden>
Signed-off-by: Prasad J Pandit <address@hidden>
---
 hw/dma/rc4030.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: xen-4.7.0-testing/tools/qemu-xen-traditional-dir-remote/hw/rc4030.c
===================================================================
--- xen-4.7.0-testing.orig/tools/qemu-xen-traditional-dir-remote/hw/rc4030.c
+++ xen-4.7.0-testing/tools/qemu-xen-traditional-dir-remote/hw/rc4030.c
@@ -366,7 +366,7 @@ static void rc4030_writel(void *opaque,
         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 CVE-2016-8667-qemut-dma-rc4030-divide-by-zero-error-in-set_next_tick.patch of Package xen (Revision 18d9f567aa76ad786ec2ce93bd88d638)

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