netdev - Re: [PATCH 2/4] caif-u5500: CAIF shared memory transport protocol

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: <20101027.110732.48492064.davem@davemloft.net>
Date:	Wed, 27 Oct 2010 11:07:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sjur.brandeland@...ricsson.com
Cc:	linux@....linux.org.uk, sjurbr@...il.com, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linus.walleij@...ricsson.com,
	stefan.xk.nilsson@...ricsson.com,
	amarnath.bangalore.revanna@...ricsson.com
Subject: Re: [PATCH 2/4] caif-u5500: CAIF shared memory transport protocol

From: Sjur Braendeland <sjur.brandeland@...ricsson.com>
Date: Fri, 22 Oct 2010 21:03:53 +0200

> +		if (!in_irq())
> +			spin_lock_bh(&pshm_drv->lock);
> +		else
> +			spin_lock_irqsave(&pshm_drv->lock, flags);

You should never have contextual based locking schemes like this,
it's not just ugly it's also deadlock prone.
--
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