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]
Date:   Mon, 13 Mar 2017 08:28:38 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Thierry Du Tre <thierry@...ystems.be>
Cc:     netdev@...r.kernel.org, Ben Greear <greearb@...delatech.com>
Subject: Re: [PATCH v2] VLAN, support ingress/egress priority map flushing

On Mon, 2017-03-13 at 15:36 +0100, Thierry Du Tre wrote:

> +void vlan_dev_flush_egress_priority(const struct net_device *dev)
> +{
> +	struct vlan_dev_priv *vlan = vlan_dev_priv(dev);
> +	struct vlan_priority_tci_mapping *mp;
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) {
> +		while ((mp = vlan->egress_priority_map[i]) != NULL) {
> +			vlan->egress_priority_map[i] = mp->next;
> +			kfree(mp);
> +		}
> +	}
> +	vlan->nr_egress_mappings = 0;
> +}


Are you doing this on a live device ?

Looks you'll need proper RCU support then.

Otherwise, crashes will happen, say in egress_priority_map()

smp_rmb() wont be enough if items can now be destroyed.



Powered by blists - more mailing lists