[PATCH v3] hw/cxl: Fix out of bound array access

[Dmitry Frolov]

According to cxl_interleave_ways_enc(), fw->num_targets is allowed to be up
to 16. This also corresponds to CXL specs. So, the fw->target_hbs[] array
is iterated from 0 to 15. But it is statically declared of length 8. Thus,
out of bound array access may occur.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

v2: assert added
v3: assert removed

Fixes: c28db9e000 ("hw/pci-bridge: Make PCIe and CXL PXB Devices inherit from 
TYPE_PXB_DEV")
Signed-off-by: Dmitry Frolov <frolov@swemel.ru>
---
 include/hw/cxl/cxl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/hw/cxl/cxl.h b/include/hw/cxl/cxl.h
index 56c9e7676e..4944725849 100644
--- a/include/hw/cxl/cxl.h
+++ b/include/hw/cxl/cxl.h
@@ -29,7 +29,7 @@ typedef struct PXBCXLDev PXBCXLDev;
 typedef struct CXLFixedWindow {
     uint64_t size;
     char **targets;
-    PXBCXLDev *target_hbs[8];
+    PXBCXLDev *target_hbs[16];
     uint8_t num_targets;
     uint8_t enc_int_ways;
     uint8_t enc_int_gran;
-- 
2.34.1