From: Michal Hocko <mhocko@suse.com>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Alexey Dobriyan <adobriyan@gmail.com>,
Lee Duncan <lduncan@suse.com>, Chris Leech <cleech@redhat.com>,
Adam Nichols <adam@grimm-co.com>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-hardening@vger.kernel.org
Subject: Re: [PATCH v2] seq_file: Unconditionally use vmalloc for buffer
Date: Tue, 16 Mar 2021 14:01:04 +0100 [thread overview]
Message-ID: <YFCsEGpi6Et3Bu3B@dhcp22.suse.cz> (raw)
In-Reply-To: <YFCn4ERBMGoqxvUU@zeniv-ca.linux.org.uk>
On Tue 16-03-21 12:43:12, Al Viro wrote:
[...]
> AFAICS, Kees wants to protect against ->show() instances stomping beyond
> the page size. What I don't get is what do you get from using seq_file
> if you insist on doing raw access to the buffer rather than using
> seq_printf() and friends. What's the point?
I do not think there is any and as you have said in other response we
should really make seq_get_buf internal thing to seq_file and be done
with that. If there is a missing functionality that users workaround by
abusing seq_get_buf then it should be added into seq_file interface.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2021-03-16 13:01 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 17:48 [PATCH v2] seq_file: Unconditionally use vmalloc for buffer Kees Cook
2021-03-15 18:33 ` Al Viro
2021-03-15 20:43 ` Kees Cook
2021-03-16 7:24 ` Greg Kroah-Hartman
2021-03-16 12:43 ` Al Viro
2021-03-16 12:55 ` Greg Kroah-Hartman
2021-03-16 13:01 ` Michal Hocko [this message]
2021-03-16 19:18 ` Kees Cook
2021-03-17 10:44 ` Greg Kroah-Hartman
2021-03-16 8:31 ` Michal Hocko
2021-03-16 19:08 ` Kees Cook
2021-03-17 12:08 ` Michal Hocko
2021-03-17 13:34 ` Greg Kroah-Hartman
2021-03-17 14:44 ` Michal Hocko
2021-03-17 14:56 ` Greg Kroah-Hartman
2021-03-17 15:20 ` Michal Hocko
2021-03-17 15:38 ` Greg Kroah-Hartman
2021-03-17 15:48 ` Michal Hocko
2021-03-17 21:30 ` Kees Cook
2021-03-18 8:07 ` Greg Kroah-Hartman
2021-03-18 15:51 ` Kees Cook
2021-03-18 17:56 ` Greg Kroah-Hartman
2021-03-19 14:07 ` [seq_file] 5fd6060e50: stress-ng.eventfd.ops_per_sec -49.1% regression kernel test robot
2021-03-19 19:31 ` Kees Cook
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