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Require FAT to occupy at least one sector.

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Obtained from:	Android https://r.android.com/1205830
MFC after:	3 days
This commit is contained in:
Xin LI 2020-01-11 03:59:06 +00:00
parent 27a6257130
commit ed0879d944
1 changed files with 1 additions and 1 deletions
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2
sbin/fsck_msdosfs/boot.c
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@ -250,7 +250,7 @@ readboot(int dosfs, struct bootblock *boot)
boot->FATsecs = boot->bpbFATsmall;
}
if (boot->FATsecs > UINT32_MAX / boot->bpbFATs) {
if (boot->FATsecs < 1 || boot->FATsecs > UINT32_MAX / boot->bpbFATs) {
pfatal("Invalid FATs(%u) with FATsecs(%zu)",
boot->bpbFATs, (size_t)boot->FATsecs);
return FSFATAL;