From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>
Subject: [Qemu-devel] [PATCH v2] audio/hda: fix guest triggerable assert
Date: Fri, 23 Nov 2018 07:39:57 +0100 [thread overview]
Message-ID: <20181123063957.9515-1-kraxel@redhat.com> (raw)
Guest writes to a readonly register trigger the assert in
intel_hda_reg_write(). Add a check and just ignore them.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1628433
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
hw/audio/intel-hda.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/audio/intel-hda.c b/hw/audio/intel-hda.c
index 23a2cf6484..33e333cc26 100644
--- a/hw/audio/intel-hda.c
+++ b/hw/audio/intel-hda.c
@@ -23,6 +23,7 @@
#include "hw/pci/msi.h"
#include "qemu/timer.h"
#include "qemu/bitops.h"
+#include "qemu/log.h"
#include "hw/audio/soundhw.h"
#include "intel-hda.h"
#include "intel-hda-defs.h"
@@ -929,6 +930,11 @@ static void intel_hda_reg_write(IntelHDAState *d, const IntelHDAReg *reg, uint32
if (!reg) {
return;
}
+ if (!reg->wmask) {
+ qemu_log_mask(LOG_GUEST_ERROR, "intel-hda: write to r/o reg %s\n",
+ reg->name);
+ return;
+ }
if (d->debug) {
time_t now = time(NULL);
--
2.9.3
reply other threads:[~2018-11-23 6:40 UTC|newest]
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