CVE-2022-49589 Information

Description

In the Linux kernel the following vulnerability has been resolved:

igmp: Fix data-races around sysctl_igmp_qrv.

While reading sysctl_igmp_qrv it can be changed concurrently. Thus we need to add READ_ONCE() to its readers.

This test can be packed into a helper so such changes will be in the follow-up series after net is merged into net-next.

qrv ?: READ_ONCE(net->ipv4.sysctl_igmp_qrv);

Reference

https://git.kernel.org/stable/c/8ebcc62c738f68688ee7c6fec2efe5bc6d3d7e60 https://git.kernel.org/stable/c/9eeb3a7702998bdccbfcc37997b5dd9215b9a7f7 https://git.kernel.org/stable/c/b399ffafffba39f47b731b26a5da1dc0ffc4b3ad https://git.kernel.org/stable/c/c2954671010cd1127d1ffa328c6e6f8e99930982 https://git.kernel.org/stable/c/c721324afc589f8ea54bae04756b150aeaae5fa4 https://git.kernel.org/stable/c/e20dd1b0e0ea15bee1e528536a0840dba972ca0e