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] [day] [month] [year] [list]
Date:   Tue, 9 Aug 2022 11:05:19 +0800 (GMT+08:00)
From:   "Lin Ma" <>
To:     "Jakub Kicinski" <>
Subject: Re: [PATCH v0] idb: Add rtnl_lock to avoid data race

Hello there,

> What about the disable path coming from sysfs? This looks incomplete to
> me. Perhaps take a look at commit 1e53834ce541 ("ixgbe: Add locking to
> prevent panic when setting sriov_numvfs to zero") for some inspiration.

Thanks for the advice, I sent the new version of the patch which uses a new spinlock to avoid race cases such as described in commit 1e53834ce541.

Additionally, I also keep the rtnl_lock to eliminate the races that come from netdev core. Although this can also be handled with the newly added spinlock, I found that adding the spinlock every time accessing the VF resources is not trivial.
(If you think that keep using the spinlock is better I will craft a new version of patch)

It seems that ixgbe_disable_sriov also suffers from the mentioned races from netdev core. If you think the rtnl_lock solution is fine, I will also send a patch for that driver too.

Lin Ma

Powered by blists - more mailing lists