[coreboot-gerrit] Change in coreboot[master]: [DONOTSUBMIT]lib: Introduce memory bugs to help test ASan

[Harshit Sharma (Code Review)]

Harshit Sharma has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/43938 )

Change subject: [DONOTSUBMIT]lib: Introduce memory bugs to help test ASan
......................................................................

[DONOTSUBMIT]lib: Introduce memory bugs to help test ASan

Introduces a few memory bugs into cbfs code to make testing easier
for the ones who are willing to try out ASan on their hardware.

Change-Id: I0839f2fd2863934ec28e2322bab04b9cc33363b4
Signed-off-by: Harshit Sharma 
---
M src/lib/cbfs.c
1 file changed, 21 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/43938/1

diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index cb66f81..839de94 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -330,9 +330,30 @@
    return 0;
 }

+#if ENV_RAMSTAGE
+	int global_array[5] = {-1};
+#endif
+
 int cbfs_boot_region_device(struct region_device *rdev)
 {
+	int stack_array[5], i, *p;
    boot_device_init();
+
+	/* global out-of-bounds */
+#if ENV_RAMSTAGE
+	for (i = 10; i > 0; i--)
+		global_array[i] = i;
+#endif
+	/* stack out-of-bounds */
+	for (i = 10; i > 0; i--)
+		stack_array[i] = i;
+
+	/* use-after-scope */
+	{
+		int x = 5;
+		p = &x;
+	}
+	*p = 10;
    return vboot_locate_cbfs(rdev) &&
           fmap_locate_area_as_rdev("COREBOOT", rdev);
 }