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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: ff419afa43 ("ethtool: trim policy tables")
Fixes: 71921690f9 ("ethtool: provide string sets with STRSET_GET request")
Reported-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Tested-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Johannes Berg 2020-10-07 12:53:50 +02:00 committed by Jakub Kicinski
parent 9d49aea13f
commit db972e5325
2 changed files with 2 additions and 1 deletions
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2
net/ethtool/netlink.h
View File

@ -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];

1
net/ethtool/strset.c
View File

@ -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[] = {