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  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:   Sun, 18 Oct 2020 12:42:54 -0700
From:   Jakub Kicinski <>
To:     Eelco Chaudron <>
Subject: Re: [PATCH net v4] net: openvswitch: fix to make sure flow_lookup()
 is not preempted

On Sat, 17 Oct 2020 20:24:51 +0200 Eelco Chaudron wrote:
> The flow_lookup() function uses per CPU variables, which must be called
> with BH disabled. However, this is fine in the general NAPI use case
> where the local BH is disabled. But, it's also called from the netlink
> context. The below patch makes sure that even in the netlink path, the
> BH is disabled.
> In addition, u64_stats_update_begin() requires a lock to ensure one writer
> which is not ensured here. Making it per-CPU and disabling NAPI (softirq)
> ensures that there is always only one writer.
> Fixes: eac87c413bf9 ("net: openvswitch: reorder masks array based on usage")
> Reported-by: Juri Lelli <>
> Signed-off-by: Eelco Chaudron <>

Applied and queued for 5.9.2. Thanks Eelco!

Powered by blists - more mailing lists