1 files changed, 2 insertions, 0 deletions

diff --git a/miscutils/nandwrite.c b/miscutils/nandwrite.c
index d0e4397fb..8df0fdc81 100644
--- a/miscutils/nandwrite.c
+++ b/miscutils/nandwrite.c
@@ -72,6 +72,8 @@ int nandwrite_main(int argc UNUSED_PARAM, char **argv)
         xioctl(fd, MEMGETINFO, &meminfo);
 
         mtdoffset = bb_strtou(opt_s, NULL, 0);
+        if (errno)
+                bb_error_msg_and_die("invalid number '%s'", opt_s);
 
         /* Pull it into a CPU register (hopefully) - smaller code that way */
         meminfo_writesize = meminfo.writesize;