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 --- cmd/sysboot.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/cmd/sysboot.c b/cmd/sysboot.c index 63a7806debe4..d14c570d96ab 100644 --- a/cmd/sysboot.c +++ b/cmd/sysboot.c @@ -76,8 +76,12 @@ static int do_sysboot(struct cmd_tbl *cmdtp, int flag, int argc, }

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); }