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]
Message-ID: <55CA4ED2.9070207@cogentembedded.com>
Date:	Tue, 11 Aug 2015 22:36:50 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Antonio Quartulli <antonio@...hcoding.com>, davem@...emloft.net
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	Linus Lüssing <linus.luessing@...3.blue>,
	Marek Lindner <mareklindner@...mailbox.ch>
Subject: Re: [PATCH 03/10] batman-adv: Make DAT capability changes atomic

Hello.

On 08/11/2015 07:35 PM, Antonio Quartulli wrote:

> From: Linus Lüssing <linus.luessing@...3.blue>

> Bitwise OR/AND assignments in C aren't guaranteed to be atomic. One
> OGM handler might undo the set/clear of a specific bit from another
> handler run in between.

> Fix this by using the atomic set_bit()/clear_bit()/test_bit() functions.

> Fixes: 17cf0ea455f1 ("batman-adv: tvlv - add distributed arp table container")
> Signed-off-by: Linus Lüssing <linus.luessing@...3.blue>
> Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
> Signed-off-by: Antonio Quartulli <antonio@...hcoding.com>
> ---
>   net/batman-adv/distributed-arp-table.c | 7 ++++---
>   net/batman-adv/types.h                 | 4 ++--
>   2 files changed, 6 insertions(+), 5 deletions(-)

> diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c
> index fb54e6a..244dcf6 100644
> --- a/net/batman-adv/distributed-arp-table.c
> +++ b/net/batman-adv/distributed-arp-table.c
[...]
> @@ -453,7 +454,7 @@ static bool batadv_is_orig_node_eligible(struct batadv_dat_candidate *res,
>   	int j;
>
>   	/* check if orig node candidate is running DAT */
> -	if (!(candidate->capabilities & BATADV_ORIG_CAPA_HAS_DAT))
> +	if (!(test_bit(BATADV_ORIG_CAPA_HAS_DAT, &candidate->capabilities)))

    () around the tst_bit() call not needed.

[...]

MBR, Sergei

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ