-diff --git a/dmidecode.c b/dmidecode.c
-index 183ced4..a43cfd1 100644
---- a/dmidecode.c
-+++ b/dmidecode.c
-@@ -4751,6 +4751,7 @@ int main(int argc, char * const argv[])
- int ret = 0; /* Returned value */
- int found = 0;
- off_t fp;
-+ size_t size;
- int efi;
- u8 *buf;
-
-@@ -4820,8 +4821,9 @@ int main(int argc, char * const argv[])
- * contain one of several types of entry points, so read enough for
- * the largest one, then determine what type it contains.
- */
-+ size = 0x20;
- if (!(opt.flags & FLAG_NO_SYSFS)
-- && (buf = read_file(0x20, SYS_ENTRY_FILE)) != NULL)
-+ && (buf = read_file(&size, SYS_ENTRY_FILE)) != NULL)
- {
- if (!(opt.flags & FLAG_QUIET))
- printf("Getting SMBIOS data from sysfs.\n");
-diff --git a/util.c b/util.c
-index f97ac0d..52ed413 100644
---- a/util.c
-+++ b/util.c
-@@ -94,10 +94,11 @@ int checksum(const u8 *buf, size_t len)
- * needs to be freed by the caller.
- * This provides a similar usage model to mem_chunk()
- *
-- * Returns pointer to buffer of max_len bytes, or NULL on error
-+ * Returns pointer to buffer of max_len bytes, or NULL on error, and
-+ * sets max_len to the length actually read.
- *
- */
--void *read_file(size_t max_len, const char *filename)
-+void *read_file(size_t *max_len, const char *filename)
- {
- int fd;
- size_t r2 = 0;
-@@ -115,7 +116,7 @@ void *read_file(size_t max_len, const char *filename)
- return(NULL);
- }
-
-- if ((p = malloc(max_len)) == NULL)
-+ if ((p = malloc(*max_len)) == NULL)
- {
- perror("malloc");
- return NULL;
-@@ -123,7 +124,7 @@ void *read_file(size_t max_len, const char *filename)
-
- do
- {
-- r = read(fd, p + r2, max_len - r2);
-+ r = read(fd, p + r2, *max_len - r2);
- if (r == -1)
- {
- if (errno != EINTR)
-@@ -140,6 +141,8 @@ void *read_file(size_t max_len, const char *filename)
- while (r != 0);
-
- close(fd);
-+ *max_len = r2;
-+
- return p;
- }
-
-diff --git a/util.h b/util.h
-index 9d409cd..b8748f1 100644
---- a/util.h
-+++ b/util.h
-@@ -25,7 +25,7 @@
- #define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
-
- int checksum(const u8 *buf, size_t len);
--void *read_file(size_t len, const char *filename);
-+void *read_file(size_t *len, const char *filename);
- void *mem_chunk(off_t base, size_t len, const char *devmem);
- int write_dump(size_t base, size_t len, const void *data, const char *dumpfile, int add);
- u64 u64_range(u64 start, u64 end);
---
-2.1.4
-