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| author | takawata <takawata@FreeBSD.org> | 2002-03-23 06:44:04 +0000 |
|---|---|---|
| committer | takawata <takawata@FreeBSD.org> | 2002-03-23 06:44:04 +0000 |
| commit | cfea68cc2558bffb3c97f4c8d7646b8266c30e9b (patch) | |
| tree | bef75178482c06f16e509b2428b46c3586c6f9f5 /sys/i386 | |
| parent | c22315924b3afee7ce2b4b2ef1ca94fbeecffbc8 (diff) | |
| download | FreeBSD-src-cfea68cc2558bffb3c97f4c8d7646b8266c30e9b.zip FreeBSD-src-cfea68cc2558bffb3c97f4c8d7646b8266c30e9b.tar.gz | |
Add bios area range check (lower side).
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/i386/bios.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/i386/i386/bios.c b/sys/i386/i386/bios.c index bf4b8a3..3d4c7e5 100644 --- a/sys/i386/i386/bios.c +++ b/sys/i386/i386/bios.c @@ -93,7 +93,8 @@ bios32_init(void *junk) ck += cv[i]; } /* If checksum is OK, enable use of the entrypoint */ - if ((ck == 0) && (sdh->entry < (BIOS_START + BIOS_SIZE))) { + if ((ck == 0) && (BIOS_START <= sdh->entry ) && + (sdh->entry < (BIOS_START + BIOS_SIZE))) { bios32_SDCI = BIOS_PADDRTOVADDR(sdh->entry); if (bootverbose) { printf("bios32: Found BIOS32 Service Directory header at %p\n", sdh); |
