From: Marek Lindner <mareklindner@neomailbox.ch>
To: b.a.t.m.a.n@lists.open-mesh.org
Subject: Re: [B.A.T.M.A.N.] [PATCH maint 1/2] batman-adv: Fix segfault when writing to throughput_override
Date: Wed, 05 Sep 2018 18:55:46 +0800 [thread overview]
Message-ID: <2732366.0R38ZFdr2M@rousseau> (raw)
In-Reply-To: <20180831144648.24032-1-sven@narfation.org>
[-- Attachment #1: Type: text/plain, Size: 1099 bytes --]
On Friday, 31 August 2018 22:46:47 HKT Sven Eckelmann wrote:
> The per hardif sysfs file "batman_adv/throughput_override" prints the
> resulting change as info text when the users writes to this file. It uses
> the helper function batadv_info to add it at the same time to the kernel
> ring buffer and to the batman-adv debug log (when CONFIG_BATMAN_ADV_DEBUG
> is enabled).
>
> The function batadv_info requires as first parameter the batman-adv softif
> net_device. This parameter is then used to find the private buffer which
> contains the debug log for this batman-adv interface. But
> batadv_store_throughput_override used as first argument the slave
> net_device. This slave device doesn't have the batadv_priv private data
> which is access by batadv_info.
>
> Writing to this file with CONFIG_BATMAN_ADV_DEBUG enabled can either lead
> to a segfault or to memory corruption.
>
> Fixes: c513176e4b7a ("batman-adv: add throughput override attribute to
> hard_ifaces") Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Marek Lindner <mareklindner@neomailbox.ch>
Cheers,
Marek
[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
next prev parent reply other threads:[~2018-09-05 10:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-31 14:46 [B.A.T.M.A.N.] [PATCH maint 1/2] batman-adv: Fix segfault when writing to throughput_override Sven Eckelmann
2018-08-31 14:46 ` [B.A.T.M.A.N.] [PATCH maint 2/2] batman-adv: Fix segfault when writing to sysfs elp_interval Sven Eckelmann
2018-08-31 14:56 ` [B.A.T.M.A.N.] [PATCH maint v2 " Sven Eckelmann
2018-09-05 11:09 ` Marek Lindner
2018-09-05 10:55 ` Marek Lindner [this message]
2018-09-05 16:07 ` [B.A.T.M.A.N.] [PATCH maint 1/2] batman-adv: Fix segfault when writing to throughput_override Sven Eckelmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2732366.0R38ZFdr2M@rousseau \
--to=mareklindner@neomailbox.ch \
--cc=b.a.t.m.a.n@lists.open-mesh.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox