netdev - Re: [PATCH net] af_netlink: Fix shift out of bounds in group mask calculation

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Date:   Sat, 19 Mar 2022 05:00:15 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Petr Machata <petrm@...dia.com>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        idosch@...dia.com
Subject: Re: [PATCH net] af_netlink: Fix shift out of bounds in group mask
 calculation

Hello:

This patch was applied to netdev/net.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Thu, 17 Mar 2022 15:53:06 +0100 you wrote:
> When a netlink message is received, netlink_recvmsg() fills in the address
> of the sender. One of the fields is the 32-bit bitfield nl_groups, which
> carries the multicast group on which the message was received. The least
> significant bit corresponds to group 1, and therefore the highest group
> that the field can represent is 32. Above that, the UB sanitizer flags the
> out-of-bounds shift attempts.
> 
> [...]

Here is the summary with links:
  - [net] af_netlink: Fix shift out of bounds in group mask calculation
    https://git.kernel.org/netdev/net/c/0caf6d992219

You are awesome, thank you!
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