From: Johannes Berg Date: Wed, 7 Oct 2020 10:53:50 +0000 (+0200) Subject: ethtool: strset: allow ETHTOOL_A_STRSET_COUNTS_ONLY attr X-Git-Tag: baikal/mips/sdk5.9~12462^2~46 X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=11c41c296520926612ef28548d197f036792fcea;p=kernel.git ethtool: strset: allow ETHTOOL_A_STRSET_COUNTS_ONLY attr The ETHTOOL_A_STRSET_COUNTS_ONLY flag attribute was previously not allowed to be used, but now due to the policy size reduction we would access the tb[] array out of bounds since we tried to check for the attribute despite it not being accepted. Fix both issues by adding it correctly to the appropriate policy. Fixes: f815c6bb01dc ("ethtool: trim policy tables") Fixes: d7bef0af95e3 ("ethtool: provide string sets with STRSET_GET request") Reported-by: Leon Romanovsky Signed-off-by: Johannes Berg Tested-by: Leon Romanovsky Reviewed-by: Jakub Kicinski Signed-off-by: Jakub Kicinski --- diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h index 3f5719786b0f3..d8efec516d868 100644 --- a/net/ethtool/netlink.h +++ b/net/ethtool/netlink.h @@ -347,7 +347,7 @@ extern const struct ethnl_request_ops ethnl_tsinfo_request_ops; extern const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_FLAGS + 1]; extern const struct nla_policy ethnl_header_policy_stats[ETHTOOL_A_HEADER_FLAGS + 1]; -extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_STRINGSETS + 1]; +extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_COUNTS_ONLY + 1]; extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_HEADER + 1]; extern const struct nla_policy ethnl_linkinfo_set_policy[ETHTOOL_A_LINKINFO_TP_MDIX_CTRL + 1]; extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_HEADER + 1]; diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c index 0734e83c674c3..0baad0ce18328 100644 --- a/net/ethtool/strset.c +++ b/net/ethtool/strset.c @@ -103,6 +103,7 @@ const struct nla_policy ethnl_strset_get_policy[] = { [ETHTOOL_A_STRSET_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), [ETHTOOL_A_STRSET_STRINGSETS] = { .type = NLA_NESTED }, + [ETHTOOL_A_STRSET_COUNTS_ONLY] = { .type = NLA_FLAG }, }; static const struct nla_policy get_stringset_policy[] = {