libxl/ACPI: don't hard-code guest page size

We have libxl_ctxt.page_size for this purpose; use it to eliminate a latent buffer overrun. Fixes: 14c0d32 ("libxl/acpi: Build ACPI tables for HVMlite guests") Signed-off-by: Jan Beulich <[email protected]> Reviewed-by: Anthony PERARD <[email protected]>
olafhering · Nov 26, 2024 · 4e0b1ad · 4e0b1ad
1 parent fcf91ce
commit 4e0b1ad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tools/libs/light/libxl_x86_acpi.c b/tools/libs/light/libxl_x86_acpi.c
@@ -218,7 +218,7 @@ int libxl__dom_load_acpi(libxl__gc *gc,
         dom->acpi_modules[0].guest_addr_out = 0x100000 - 64;
 
     dom->acpi_modules[1].data = (void *)config.infop;
-    dom->acpi_modules[1].length = 4096;
+    dom->acpi_modules[1].length = libxl_ctxt.page_size;
     dom->acpi_modules[1].guest_addr_out = ACPI_INFO_PHYSICAL_ADDRESS;
 
     dom->acpi_modules[2].data = libxl_ctxt.buf;