cmd: sysboot: null check filename
Currently if ${bootfile} is unset and sysboot is invoked with no
filename specified then U-Boot will crash will a null-pointer
dereference. Add the missing check and a matching error print.
Fixes: 993c912d304d ("cmd: sysboot: Create a sysboot command dedicated file")
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/cmd/sysboot.c b/cmd/sysboot.c
index 63a7806..d14c570 100644
--- a/cmd/sysboot.c
+++ b/cmd/sysboot.c
@@ -77,6 +77,10 @@
if (argc < 6) {
filename = env_get("bootfile");
+ if (!filename) {
+ printf("Specify a filename or set the ${bootfile} environment variable\n");
+ return 1;
+ }
} else {
filename = argv[5];
env_set("bootfile", filename);