File 0185-hw-pci-host-add-pci-intack-write-me.patch of Package qemu.19806

From: Prasad J Pandit <pjp@fedoraproject.org>
Date: Tue, 11 Aug 2020 17:11:25 +0530
Subject: hw/pci-host: add pci-intack write method

Git-commit: 520f26fc6d17b71a43eaf620e834b3bdf316f3d3
References: bsc#1173612, CVE-2020-15469

Add pci-intack mmio write method to avoid NULL pointer dereference
issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
Message-Id: <20200811114133.672647-2-ppandit@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/pci-host/prep.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index b1b6b16badb38ff35e4c50f358fd..9b6166dc6d462704797aa044ffa7 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -25,6 +25,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/log.h"
 #include "qapi/error.h"
 #include "hw/hw.h"
 #include "hw/pci/pci.h"
@@ -116,8 +117,15 @@ static uint64_t raven_intack_read(void *opaque, hwaddr addr,
     return pic_read_irq(isa_pic);
 }
 
+static void raven_intack_write(void *opaque, hwaddr addr,
+                                        uint64_t data, unsigned size)
+{
+    qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
+}
+
 static const MemoryRegionOps raven_intack_ops = {
     .read = raven_intack_read,
+    .write = raven_intack_write,
     .valid = {
         .max_access_size = 1,
     },