Re: [PATCH net v2] net: openvswitch: fix data race in ovs_vport_get_upcall_stats

David Yang [off-list ref] writes:

In ovs_vport_get_upcall_stats(), some statistics protected by
u64_stats_sync, are read and accumulated in ignorance of possible
u64_stats_fetch_retry() events. These statistics are already accumulated
by u64_stats_inc(). Fix this by reading them into temporary variables
first.

Fixes: 1933ea365aa7 ("net: openvswitch: Add support to count upcall packets")
Signed-off-by: David Yang <mmyangfl@gmail.com>
---
v1: https://lore.kernel.org/r/20260119181339.1847451-1-mmyangfl@gmail.com (local)
  - use u64 instead of __u64
 net/openvswitch/vport.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

Thanks for the patch - I did a spot-check of the rest of the module with
the following:

  ~/git/linux/net/openvswitch$ grep -nr 'while\(.*fetch.*\)'

and didn't find any other places that seemed to duplicate this
mistaken read pattern (at least in the OVS kernel module).

Reviewed-by: Aaron Conole <aconole@redhat.com>