From 32e9fb62e900e94cb2e39e6bd9717983bb259d25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Tue, 23 Nov 2021 12:17:32 +0100
Subject: [PATCH 2/4] tests/qtest: Add fuzz-lsi53c895a-test
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Without the previous commit, this test triggers:

  $ make check-qtest-x86_64
  [...]
  Running test qtest-x86_64/fuzz-lsi53c895a-test
  qemu-system-x86_64: hw/scsi/lsi53c895a.c:624: lsi_do_dma: Assertion `s->current' failed.
  ERROR qtest-x86_64/fuzz-lsi53c895a-test - too few tests run (expected 1, got 0)

Suggested-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20211123111732.83137-3-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 MAINTAINERS                        |  1 +
 tests/qtest/fuzz-lsi53c895a-test.c | 52 ++++++++++++++++++++++++++++++
 tests/qtest/meson.build            |  1 +
 3 files changed, 54 insertions(+)
 create mode 100644 tests/qtest/fuzz-lsi53c895a-test.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 7543eb4d59..fbd6d0b174 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1825,6 +1825,7 @@ F: hw/scsi/*
 F: tests/qtest/virtio-scsi-test.c
 F: tests/qtest/fuzz-virtio-scsi-test.c
 F: tests/qtest/am53c974-test.c
+F: tests/qtest/fuzz-lsi53c895a-test.c
 T: git https://github.com/bonzini/qemu.git scsi-next
 
 SSI
diff --git a/tests/qtest/fuzz-lsi53c895a-test.c b/tests/qtest/fuzz-lsi53c895a-test.c
new file mode 100644
index 0000000000..ba5d468970
--- /dev/null
+++ b/tests/qtest/fuzz-lsi53c895a-test.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QTest fuzzer-generated testcase for LSI53C895A device
+ *
+ * Copyright (c) Red Hat
+ */
+
+#include "qemu/osdep.h"
+#include "libqos/libqtest.h"
+
+/*
+ * This used to trigger the assert in lsi_do_dma()
+ * https://bugs.launchpad.net/qemu/+bug/697510
+ * https://bugs.launchpad.net/qemu/+bug/1905521
+ * https://bugs.launchpad.net/qemu/+bug/1908515
+ */
+static void test_lsi_do_dma_empty_queue(void)
+{
+    QTestState *s;
+
+    s = qtest_init("-M q35 -nographic -monitor none -serial none "
+                   "-drive if=none,id=drive0,"
+                            "file=null-co://,file.read-zeroes=on,format=raw "
+                   "-device lsi53c895a,id=scsi0 "
+                   "-device scsi-hd,drive=drive0,"
+                            "bus=scsi0.0,channel=0,scsi-id=0,lun=0");
+    qtest_outl(s, 0xcf8, 0x80001814);
+    qtest_outl(s, 0xcfc, 0xe1068000);
+    qtest_outl(s, 0xcf8, 0x80001818);
+    qtest_outl(s, 0xcf8, 0x80001804);
+    qtest_outw(s, 0xcfc, 0x7);
+    qtest_outl(s, 0xcf8, 0x80002010);
+
+    qtest_writeb(s, 0xe106802e, 0xff); /* Fill DSP bits 16-23 */
+    qtest_writeb(s, 0xe106802f, 0xff); /* Fill DSP bits 24-31: trigger SCRIPT */
+
+    qtest_quit(s);
+}
+
+int main(int argc, char **argv)
+{
+    const char *arch = qtest_get_arch();
+
+    g_test_init(&argc, &argv, NULL);
+
+    if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
+        qtest_add_func("fuzz/lsi53c895a/lsi_do_dma_empty_queue",
+                       test_lsi_do_dma_empty_queue);
+    }
+
+    return g_test_run();
+}
diff --git a/tests/qtest/meson.build b/tests/qtest/meson.build
index c9d8458062..d2ce20d304 100644
--- a/tests/qtest/meson.build
+++ b/tests/qtest/meson.build
@@ -19,6 +19,7 @@ slow_qtests = {
 
 qtests_generic = \
   (config_all_devices.has_key('CONFIG_MEGASAS_SCSI_PCI') ? ['fuzz-megasas-test'] : []) + \
+  (config_all_devices.has_key('CONFIG_LSI_SCSI_PCI') ? ['fuzz-lsi53c895a-test'] : []) + \
   (config_all_devices.has_key('CONFIG_VIRTIO_SCSI') ? ['fuzz-virtio-scsi-test'] : []) + \
   (config_all_devices.has_key('CONFIG_SB16') ? ['fuzz-sb16-test'] : []) + \
   (config_all_devices.has_key('CONFIG_SDHCI_PCI') ? ['fuzz-sdcard-test'] : []) + \
-- 
2.27.0