linux-kernel - Re: [PATCH] ubifs: remove unnecessary check in ubifs_log_start

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 21 Aug 2018 08:25:30 +0200
From:   Richard Weinberger <richard@....at>
To:     Liu Song <liu.song11@....com.cn>
Cc:     dedekind1@...il.com, adrian.hunter@...el.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        jiang.biao2@....com.cn, zhong.weidong@....com.cn
Subject: Re: [PATCH] ubifs: remove unnecessary check in ubifs_log_start_commit

Liu Song,

Am Dienstag, 21. August 2018, 05:17:22 CEST schrieb Liu Song:
> The value of c->lhead_offs cannot exceed max_len which much
> smaller than c->leb_size. So the check will never be true.
> Just remove it.

Please explain in more detail why this case is never ever possible.
Removing such code needs a good justification. 

In general I don't much like such changes for two reasons:
1. They don't fix a problem
2. They are likely to introduce very hard to debug new issues if they are wrong

Thanks,
//richard