linux-kernel - Re: [RFC v4][PATCH 8/9] File descriprtors (dump)

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:	Tue, 9 Sep 2008 10:06:56 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Oren Laadan" <orenl@...columbia.edu>
Cc:	dave@...ux.vnet.ibm.com, arnd@...db.de, jeremy@...p.org,
	linux-kernel@...r.kernel.org, containers@...ts.linux-foundation.org
Subject: Re: [RFC v4][PATCH 8/9] File descriprtors (dump)

On Tue, Sep 9, 2008 at 9:42 AM, Oren Laadan <orenl@...columbia.edu> wrote:
> +       fdlist = kmalloc(max * sizeof(*fdlist), GFP_KERNEL);
> +       if (!fdlist)
> +               return -ENOMEM;
> +
> +       spin_lock(&files->file_lock);
> +       fdt = files_fdtable(files);
> +       for (i = 0; i < fdt->max_fds; i++) {
> +               if (!fcheck_files(files, i))
> +                       continue;
> +               if (n == max) {
> +                       /* fcheck_files() is safe with drop/re-acquire
> +                        * of the lock, as it tests:  fd < max_fds */
> +                       spin_unlock(&files->file_lock);
> +                       max *= 2;
> +                       if (max < 0) {  /* overflow ? */
> +                               n = -EMFILE;
> +                               goto out;
> +                       }
> +                       fdlist = krealloc(fdlist, max, GFP_KERNEL);

Hm, shouldn't this be max * sizeof(*fdlist) like the kmalloc above?


Vegard

-- 
"The animistic metaphor of the bug that maliciously sneaked in while
the programmer was not looking is intellectually dishonest as it
disguises that the error is the programmer's own creation."
	-- E. W. Dijkstra, EWD1036
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/