Page MenuHomeFreeBSD

Make superblock reading logic more strict.
ClosedPublic

Authored by fsu on Feb 24 2019, 1:13 PM.

Details

Summary

Now the comput_sb_data() function checks on-disk superblock data fields more carefully. Also, the cylinder group validation function is added.
It should decrease ability to mount filesystems with corrupted superblock data.

Test Plan

Typical fsx/fstorture tests to avoid regression.

Diff Detail

Repository
rS FreeBSD src repository
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

fsu created this revision.Feb 24 2019, 1:13 PM
pfg accepted this revision.Feb 27 2019, 2:43 PM
pfg added inline comments.
sys/fs/ext2fs/ext2fs.h
398 ↗(On Diff #54285)

Use a TAB after the

#define
This revision is now accepted and ready to land.Feb 27 2019, 2:43 PM
This revision was automatically updated to reflect the committed changes.