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: Sun, 12 Nov 2023 09:45:24 +0000
From: Simon Horman <horms@...nel.org>
To: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: linux-hyperv@...r.kernel.org, netdev@...r.kernel.org, kys@...rosoft.com,
	wei.liu@...nel.org, decui@...rosoft.com, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com, davem@...emloft.net,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH net,v4, 1/3] hv_netvsc: fix race of netvsc and VF
 register_netdevice

On Fri, Nov 10, 2023 at 06:38:58AM -0800, Haiyang Zhang wrote:
> The rtnl lock also needs to be held before rndis_filter_device_add()
> which advertises nvsp_2_vsc_capability / sriov bit, and triggers
> VF NIC offering and registering. If VF NIC finished register_netdev()
> earlier it may cause name based config failure.
> 
> To fix this issue, move the call to rtnl_lock() before
> rndis_filter_device_add(), so VF will be registered later than netvsc
> / synthetic NIC, and gets a name numbered (ethX) after netvsc.
> 
> Cc: stable@...r.kernel.org
> Fixes: e04e7a7bbd4b ("hv_netvsc: Fix a deadlock by getting rtnl lock earlier in netvsc_probe()")
> Reported-by: Dexuan Cui <decui@...rosoft.com>
> Signed-off-by: Haiyang Zhang <haiyangz@...rosoft.com>
> Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>

Reviewed-by: Simon Horman <horms@...nel.org>


Powered by blists - more mailing lists