From daed26bb7ff6714e1c2eaa3dc980c4ce4343e307 Mon Sep 17 00:00:00 2001 From: Hongyan Xia Date: Tue, 24 Mar 2020 10:44:22 +0100 Subject: [PATCH] x86/tboot: check return value of dmar_table allocation The allocation can just return NULL. Return an error value early instead of crashing later on. Signed-off-by: Hongyan Xia Reviewed-by: Jan Beulich --- xen/arch/x86/tboot.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/arch/x86/tboot.c b/xen/arch/x86/tboot.c index 8c232270b4..ce85a710dd 100644 --- a/xen/arch/x86/tboot.c +++ b/xen/arch/x86/tboot.c @@ -480,6 +480,8 @@ int __init tboot_parse_dmar_table(acpi_table_handler dmar_handler) sizeof(dmar_table_length), pa + sizeof(char) * ACPI_NAME_SIZE); dmar_table = xmalloc_bytes(dmar_table_length); + if ( !dmar_table ) + return -ENOMEM; tboot_copy_memory(dmar_table, dmar_table_length, pa); clear_fixmap(FIX_TBOOT_MAP_ADDRESS); -- 2.30.2