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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 3 Sep 2015 09:52:57 +0900
From:	Atsushi Nemoto <nemoto@...hiba-tops.co.jp>
To:	<davem@...emloft.net>
CC:	<vbridger@...nsource.altera.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH] net: eth: altera: fix napi poll_list corruption

On Wed, 2 Sep 2015 11:25:00 -0700, David Miller <davem@...emloft.net> wrote:
> Two lines below this change you are disabling interrupts anyways,
> so I would suggest just moving the spin_lock_irqsave() before the
> napi_gro_flush() to fix this.
> 
> Many of the checks done by napi_complete_done() (invoked by
> napi_complete()) are completely redundant in this context.  For
> example, the direct __napi_complete() call is a really nice
> optimization because we know we are on the poll list and therefore
> it is not empty.

Thank you for your suggestion.

I think napi_gro_flush() can be called with irq enabled, so moving the
spin_lock_irqsave() just before the __napi_complete() (or moving the
__napi_complete() just after the spin_lock_irqsave()) would be better,
right?
--
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