From 80214941ed6ce24983d8f161a7c9532678acc6f1 Mon Sep 17 00:00:00 2001 From: Prasad J Pandit Date: Thu, 25 Mar 2021 17:03:57 +0800 Subject: [PATCH] hw/pci-host: add pci-intack write method fix CVE-2020-15469 Add pci-intack mmio write method to avoid NULL pointer dereference issue. Reported-by: Lei Sun Reviewed-by: Li Qiang Signed-off-by: Prasad J Pandit Signed-off-by: Jiajie Li --- 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 c564f234af..f03c81f651 100644 --- a/hw/pci-host/prep.c +++ b/hw/pci-host/prep.c @@ -26,6 +26,7 @@ #include "qemu/osdep.h" #include "qemu-common.h" #include "qemu/units.h" +#include "qemu/log.h" #include "qapi/error.h" #include "hw/hw.h" #include "hw/pci/pci.h" @@ -117,8 +118,15 @@ 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, }, -- 2.27.0