[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.schucha...@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