The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 1fab1b89e2e8f01204a9c05a39fd0b6411a48593 Mon Sep 17 00:00:00 2001
From: Markus Theil markus.theil@tu-ilmenau.de Date: Tue, 29 Oct 2019 10:30:03 +0100 Subject: [PATCH] nl80211: fix validation of mesh path nexthop
Mesh path nexthop should be a ethernet address, but current validation checks against 4 byte integers.
Cc: stable@vger.kernel.org Fixes: 2ec600d672e74 ("nl80211/cfg80211: support for mesh, sta dumping") Signed-off-by: Markus Theil markus.theil@tu-ilmenau.de Link: https://lore.kernel.org/r/20191029093003.10355-1-markus.theil@tu-ilmenau.de Signed-off-by: Johannes Berg johannes.berg@intel.com
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 4453dd375de9..7b72286922f7 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -393,7 +393,7 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, .len = IEEE80211_MAX_MESH_ID_LEN }, - [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, + [NL80211_ATTR_MPATH_NEXT_HOP] = NLA_POLICY_ETH_ADDR_COMPAT,
[NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 }, [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },