[PATCH 1/1] tools/fdt_add_pubkey: error handling in add_pubkey

[Heinrich Schuchardt]

* If info is NULL, do not dereference it.
* If mmap fails, print an error message.

Fixes: 30238e99619c ("tools: add fdt_add_pubkey")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 tools/fdt_add_pubkey.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/fdt_add_pubkey.c b/tools/fdt_add_pubkey.c
index 5582d7a8ef..7843a006f0 100644
--- a/tools/fdt_add_pubkey.c
+++ b/tools/fdt_add_pubkey.c
@@ -89,8 +89,10 @@ static int add_pubkey(struct image_sign_info *info)
 	struct stat dest_sbuf;
 	size_t size_inc = 0;
 
-	if (!info)
+	if (!info) {
 		fprintf(stderr, "Error: info is NULL in %s\n", __func__);
+		return -EINVAL;
+	}
 
 	do {
 		if (destfd >= 0) {
@@ -104,7 +106,7 @@ static int add_pubkey(struct image_sign_info *info)
 		destfd = mmap_fdt(cmdname, keydest, size_inc, &dest_blob,
 				  &dest_sbuf, false, false);
 		if (destfd < 0)
-			exit(EXIT_FAILURE);
+			return -ENOSPC;
 
 		ret = info->crypto->add_verify_data(info, dest_blob);
 		if (ret == -ENOSPC)
-- 
2.40.1