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Some BIOSes return incorrect number of sectors, make checks less

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strictly, to do not lost some partitions.

Reported by:	swills@
This commit is contained in:
Andrey V. Elsukov 2012-08-15 12:01:13 +00:00
parent deafa47873
commit 4b81189aff
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=239294
1 changed files with 4 additions and 0 deletions
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4
sys/boot/common/part.c
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@ -372,8 +372,10 @@ ptable_ebrread(struct ptable *table, void *dev, diskread_t dread)
if (buf == NULL)
return (table);
for (i = 0; i < MAXEBRENTRIES; i++) {
#if 0
if (offset >= table->sectors)
break;
#endif
if (dread(dev, buf, 1, offset) != 0)
break;
dp = (struct dos_partition *)(buf + DOSPARTOFF);
@ -663,8 +665,10 @@ ptable_open(void *dev, off_t sectors, uint16_t sectorsize,
end = le32toh(dp[i].dp_size);
if (start == 0 || end == 0)
continue;
#if 0
if (start + end - 1 >= sectors)
continue; /* XXX: ignore */
#endif
if (dp[i].dp_typ == DOSPTYP_EXT ||
dp[i].dp_typ == DOSPTYP_EXTLBA)
has_ext = 1;