Re: [PATCH net-next v2] ipv4: igmp: annotate data-races around im->users

[Jiayuan Chen]

On 5/22/26 5:39 PM, Yuyang Huang wrote:
> /proc/net/igmp walks IPv4 multicast memberships under RCU and
> prints im->users without holding RTNL, while multicast join and leave
> paths update the field while holding RTNL. Annotate this intentional
> lockless snapshot with READ_ONCE() and the matching writers with
> WRITE_ONCE().
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Yuyang Huang <sigefriedhyy@xxxxxxxxx>


Reviewed-by: Jiayuan Chen <jiayuan.chen@xxxxxxxxx>