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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Mark Bloch , Shigeru Yoshida , Breno Leitao , Stanislav Fomichev , Carolina Jubran , linux-kernel@vger.kernel.org Subject: [PATCH net-next 4/4] vxlan: vnifilter: fix memcpy with u64_stats Date: Tue, 20 Jan 2026 17:21:32 +0800 Message-ID: <20260120092137.2161162-5-mmyangfl@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260120092137.2161162-1-mmyangfl@gmail.com> References: <20260120092137.2161162-1-mmyangfl@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On 64bit arches, struct u64_stats_sync is empty and provides no help against load/store tearing. memcpy() should not be considered atomic against u64 values. Use u64_stats_copy() instead. Signed-off-by: David Yang --- drivers/net/vxlan/vxlan_vnifilter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/vxlan/vxlan_vnifilter.c b/drivers/net/vxlan/vxlan_vnifilter.c index adc89e651e27..cde897d92f24 100644 --- a/drivers/net/vxlan/vxlan_vnifilter.c +++ b/drivers/net/vxlan/vxlan_vnifilter.c @@ -126,7 +126,7 @@ static void vxlan_vnifilter_stats_get(const struct vxlan_vni_node *vninode, pstats = per_cpu_ptr(vninode->stats, i); do { start = u64_stats_fetch_begin(&pstats->syncp); - memcpy(&temp, &pstats->stats, sizeof(temp)); + u64_stats_copy(&temp, &pstats->stats, sizeof(temp)); } while (u64_stats_fetch_retry(&pstats->syncp, start)); dest->rx_packets += temp.rx_packets; -- 2.51.0