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[PULL,v2,05/61] hw/cxl/cxl-host: Fix segmentation fault when getting cxl-fmw property

Message ID a207d5f87d66f7933b50677e047498fc4af63e1f.1721731723.git.mst@redhat.com
State New
Headers show
Series [PULL,v2,01/61] hw/virtio/virtio-crypto: Fix op_code assignment in virtio_crypto_create_asym_session | expand

Commit Message

Michael S. Tsirkin July 23, 2024, 10:55 a.m. UTC 
From: Zhao Liu <zhao1.liu@intel.com>

QEMU crashes (Segmentation fault) when getting cxl-fmw property via
qmp:

(QEMU) qom-get path=machine property=cxl-fmw

This issue is caused by accessing wrong callback (opaque) type in
machine_get_cfmw().

cxl_machine_init() sets the callback as `CXLState *` type but
machine_get_cfmw() treats the callback as
`CXLFixedMemoryWindowOptionsList **`.

Fix this error by casting opaque to `CXLState *` type in
machine_get_cfmw().

Fixes: 03b39fcf64bc ("hw/cxl: Make the CXL fixed memory window setup a machine parameter.")
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Xingtao Yao <yaoxt.fnst@fujitsu.com>
Link: https://lore.kernel.org/r/20240704093404.1848132-1-zhao1.liu@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20240705113956.941732-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/cxl/cxl-host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/hw/cxl/cxl-host.c b/hw/cxl/cxl-host.c
index c5f5fcfd64..e9f2543c43 100644
--- a/hw/cxl/cxl-host.c
+++ b/hw/cxl/cxl-host.c
@@ -315,7 +315,8 @@  static void machine_set_cxl(Object *obj, Visitor *v, const char *name,
 static void machine_get_cfmw(Object *obj, Visitor *v, const char *name,
                              void *opaque, Error **errp)
 {
-    CXLFixedMemoryWindowOptionsList **list = opaque;
+    CXLState *state = opaque;
+    CXLFixedMemoryWindowOptionsList **list = &state->cfmw_list;
 
     visit_type_CXLFixedMemoryWindowOptionsList(v, name, list, errp);
 }