Support for NLA_POLICY_RANGE(NLA_BINARY, ...) was added in upstream
Linux commit c8b828023088 ("nl80211: use NLA_POLICY_RANGE(NLA_BINARY,
...) for a few attributes") and needs commit 8aa26c575fb ("netlink: make
NLA_BINARY validation more flexible") which was added in kernel 5.10.
Just ignore the checks in older kernel versions.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/net/netlink.h | 6 +++
patches/0099-netlink-range/mac80211.patch | 57 +++++++++++++++++++++++
2 files changed, 63 insertions(+)
create mode 100644 patches/0099-netlink-range/mac80211.patch
diff --git a/backport/backport-include/net/netlink.h b/backport/backport-include/net/netlink.h
index 082ac4d0..c97f9abd 100644
--- a/backport/backport-include/net/netlink.h
+++ b/backport/backport-include/net/netlink.h
@@ -719,4 +719,10 @@ static inline void *nla_memdup(const struct nlattr *src, gfp_t gfp)
}
#endif /* < 4.9 */
+#ifndef NLA_POLICY_MIN_LEN
+#define NLA_POLICY_MIN_LEN(_len) { \
+ .type = NLA_BINARY \
+}
+#endif
+
#endif /* __BACKPORT_NET_NETLINK_H */
diff --git a/patches/0099-netlink-range/mac80211.patch b/patches/0099-netlink-range/mac80211.patch
new file mode 100644
index 00000000..48afe208
--- /dev/null
+++ b/patches/0099-netlink-range/mac80211.patch
@@ -0,0 +1,57 @@
+--- a/net/wireless/nl80211.c
++++ b/net/wireless/nl80211.c
+@@ -387,9 +387,11 @@ static const struct nla_policy
+ nl80211_fils_discovery_policy[NL80211_FILS_DISCOVERY_ATTR_MAX + 1] = {
+ [NL80211_FILS_DISCOVERY_ATTR_INT_MIN] = NLA_POLICY_MAX(NLA_U32, 10000),
+ [NL80211_FILS_DISCOVERY_ATTR_INT_MAX] = NLA_POLICY_MAX(NLA_U32, 10000),
++#if LINUX_VERSION_IS_GEQ(5,10,0)
+ NLA_POLICY_RANGE(NLA_BINARY,
+ NL80211_FILS_DISCOVERY_TMPL_MIN_LEN,
+ IEEE80211_MAX_DATA_LEN),
++#endif
+ };
+
+ static const struct nla_policy
+@@ -617,16 +619,26 @@ static const struct nla_policy nl80211_p
+ * The value of the Length field of the Supported Operating
+ * Classes element is between 2 and 253.
+ */
++#if LINUX_VERSION_IS_GEQ(5,10,0)
+ [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] =
+ NLA_POLICY_RANGE(NLA_BINARY, 2, 253),
++#else
++ [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] =
++ { .type = NLA_BINARY },
++#endif
+ [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
+ [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
+ [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
+ [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
+ [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
++#if LINUX_VERSION_IS_GEQ(5,10,0)
+ [NL80211_ATTR_QOS_MAP] = NLA_POLICY_RANGE(NLA_BINARY,
+ IEEE80211_QOS_MAP_LEN_MIN,
+ IEEE80211_QOS_MAP_LEN_MAX),
++#else
++ [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
++ .len = IEEE80211_QOS_MAP_LEN_MAX },
++#endif
+ [NL80211_ATTR_MAC_HINT] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
+ [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
+ [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
+@@ -681,10 +693,15 @@ static const struct nla_policy nl80211_p
+ [NL80211_ATTR_TXQ_LIMIT] = { .type = NLA_U32 },
+ [NL80211_ATTR_TXQ_MEMORY_LIMIT] = { .type = NLA_U32 },
+ [NL80211_ATTR_TXQ_QUANTUM] = { .type = NLA_U32 },
++#if LINUX_VERSION_IS_GEQ(5,10,0)
+ [NL80211_ATTR_HE_CAPABILITY] =
+ NLA_POLICY_RANGE(NLA_BINARY,
+ NL80211_HE_MIN_CAPABILITY_LEN,
+ NL80211_HE_MAX_CAPABILITY_LEN),
++#else
++ [NL80211_ATTR_HE_CAPABILITY] = { .type = NLA_BINARY,
++ .len = NL80211_HE_MAX_CAPABILITY_LEN },
++#endif
+ [NL80211_ATTR_FTM_RESPONDER] =
+ NLA_POLICY_NESTED(nl80211_ftm_responder_policy),
+ [NL80211_ATTR_TIMEOUT] = NLA_POLICY_MIN(NLA_U32, 1),
--
2.20.1
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