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| author | Yuyang Huang <yuyanghuang@google.com> | 2026-06-05 04:43:17 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2026-06-09 14:19:33 +0300 |
| commit | 1719841cab55d9da92b2e55b6e0c701e10201467 (patch) | |
| tree | 9d6a84926780de7db704145fc1c0937b67c472f0 /include/linux/timerqueue.h | |
| parent | 193b76eb109ed3ed77400c6d493b2f495ca64d9e (diff) | |
| download | linux-1719841cab55d9da92b2e55b6e0c701e10201467.tar.xz | |
ipv4: igmp: annotate data-races around in_dev->mc_count
/proc/net/igmp walks the multicast list for IPv4 interfaces locklessly
under RCU and prints state->in_dev->mc_count. Concurrently, device
init/destruction and multicast join/leave paths update the count
under the RTNL lock. Fix this intentional lockless snapshot by
annotating the read with READ_ONCE() and the updates with WRITE_ONCE().
Signed-off-by: Yuyang Huang <yuyanghuang@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260605014318.3890804-2-yuyanghuang@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/linux/timerqueue.h')
0 files changed, 0 insertions, 0 deletions