[Bug 259068] ext2fs can violate some INVARIANTS if file system is damaged

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 18 Mar 2023 06:17:15 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=259068

--- Comment #1 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=366da717deda3964ae369f1f2fbd62114d14c587

commit 366da717deda3964ae369f1f2fbd62114d14c587
Author:     Fedor Uporov <fsu@FreeBSD.org>
AuthorDate: 2023-02-09 09:34:25 +0000
Commit:     Fedor Uporov <fsu@FreeBSD.org>
CommitDate: 2023-03-18 06:16:22 +0000

    Add root directory entry check.

    Add check that directory entry with ino=EXT2_ROOTINO
    have correct namelength and name. It is possible to
    create malicious image which will cause panic if root
    directory entry have incorrect name.

    PR:                     259068
    Reported by:            Robert Morris
    Reviewed by:            pfg
    MFC after:              2 weeks
    Differential Revision:  https://reviews.freebsd.org/D38502

 sys/fs/ext2fs/ext2_lookup.c | 7 +++++++
 1 file changed, 7 insertions(+)

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