If the modules are unstripped and/or especially large, then the stack can overflow. --- init/init.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/init/init.c b/init/init.c index 106be02..733d66e 100644 --- a/init/init.c +++ b/init/init.c @@ -314,7 +314,11 @@ insmod (const char *filename) exit (EXIT_FAILURE); } size = st.st_size; - char buf[size]; + char *buf = malloc (size); + if (buf == NULL) { + fprintf (stderr, "insmod: malloc (%s, %zu bytes): %m\n", filename, size); + exit (EXIT_FAILURE); + } size_t offset = 0; do { ssize_t rc = read (fd, buf + offset, size - offset); @@ -332,6 +336,8 @@ insmod (const char *filename) * of a missing device. */ } + + free (buf); } /* Mount /proc unless it's mounted already. */ -- 2.7.4