linux-kernel - Re: [PATCH v4 06/11] net/9p: fix bug in client create for .L

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

Date:   Sat, 18 Feb 2023 17:01:47 +0900
From:   asmadeus@...ewreck.org
To:     Eric Van Hensbergen <ericvh@...nel.org>
Cc:     v9fs-developer@...ts.sourceforge.net, rminnich@...il.com,
        lucho@...kov.net, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux_oss@...debyte.com
Subject: Re: [PATCH v4 06/11] net/9p: fix bug in client create for .L

Eric Van Hensbergen wrote on Sat, Feb 18, 2023 at 12:33:18AM +0000:
> We are supposed to set fid->mode to reflect the flags
> that were used to open the file.  We were actually setting
> it to the creation mode which is the default perms of the
> file not the flags the file was opened with.
> 
> Signed-off-by: Eric Van Hensbergen <ericvh@...nel.org>

I was about to say fcreate has the same problem, but TCREATE's mode
actually is the open mode (0 (called OREAD), 1 (OWRITE), 2 (ORDWR), and
3 (OEXEC)) and dotl's create is called perm :|

I guess that's where the mistake came from... Good catch!
(and there's also p9_wstat's mode which also is the perms to make things
more confusing...)


Anyway,
Reviewed-by: Dominique Martinet <asmadeus@...ewreck.org>

-- 
Dominique