net: openvswitch: fix data race in ovs_vport_get_upcall_stats

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[ Upstream commit cc4816bdb0 ]

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: 1933ea365a ("net: openvswitch: Add support to count upcall packets")
Signed-off-by: David Yang <mmyangfl@gmail.com>
Acked-by: Ilya Maximets <i.maximets@ovn.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Aaron Conole <aconole@redhat.com>
Link: https://patch.msgid.link/20260121072932.2360971-1-mmyangfl@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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David Yang 2026-01-21 15:29:26 +08:00 • committed by Greg Kroah-Hartman

parent 1baa43ebca

commit a8043681b1

1 changed files with 6 additions and 5 deletions

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net/openvswitch/vport.c

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