d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Detect and handle invalid number of FATs

Browse Source 
If the number of FATs field in the boot sector is zero, give
an appropriate error code.

Obtained from:	Android 6c29bbe8d5%5E%21/
MFC after:	2 weeks
This commit is contained in:
Xin LI 2018-07-13 02:02:16 +00:00
parent bcbc8d35eb
commit 7f2b7ec93c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=336236
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sbin/fsck_msdosfs/boot.c
View File

@ -87,6 +87,10 @@ readboot(int dosfs, struct bootblock *boot)
pfatal("Invalid sector size: %u", boot->bpbBytesPerSec);
return FSFATAL;
}
if (boot->bpbFATs == 0) {
pfatal("Invalid number of FATs: %u", boot->bpbFATs);
return FSFATAL;
}
if (!boot->bpbRootDirEnts)
boot->flags |= FAT32;
if (boot->flags & FAT32) {