diff options
| -rw-r--r-- | memdisk/setup.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/memdisk/setup.c b/memdisk/setup.c index 745cfe4a..556d1996 100644 --- a/memdisk/setup.c +++ b/memdisk/setup.c @@ -507,15 +507,16 @@ static uint32_t pnp_install_check(void) { uint32_t *seg; unsigned char *p, csum; - int i; + int i, len; for (seg = (uint32_t *)0xf0000; seg < (uint32_t *)0x100000; seg += 4) { if (*seg == ('$'+('P' << 8)+('n' << 16)+('P' << 24))) { p = (unsigned char *)seg; - if (p[2] < 0x21) + len = p[5]; + if (len < 0x21) continue; csum = 0; - for (i = p[2]; i; i--) + for (i = len; i; i--) csum += *p++; if (csum != 0) continue; |