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[ Upstream commita8620de72e] In efx_tc_ct_zone_ht_params, the key_len was previously set to offsetof(struct efx_tc_ct_zone, linkage). This calculation is incorrect because it includes any padding between the zone field and the linkage field due to structure alignment, which can vary between systems. This patch updates key_len to use sizeof_field(struct efx_tc_ct_zone, zone) , ensuring that the hash table correctly uses the zone as the key. This fix prevents potential hash lookup errors and improves connection tracking reliability. Fixes:c3bb5c6acd("sfc: functions to register for conntrack zone offload") Signed-off-by: Liang Jie <liangjie@lixiang.com> Acked-by: Edward Cree <ecree.xilinx@gmail.com> Link: https://patch.msgid.link/20241230093709.3226854-1-buaajxlj@163.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>