4.9-stable review patch. If anyone has any objections, please let me know.
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From: Yuan-Chi Pang fu3mo6goo@gmail.com
[ Upstream commit 1f631c3201fe5491808df143d8fcba81b3197ffd ]
IEEE 802.11-2016 14.10.8.3 HWMP sequence numbering says: If it is a target mesh STA, it shall update its own HWMP SN to maximum (current HWMP SN, target HWMP SN in the PREQ element) + 1 immediately before it generates a PREP element in response to a PREQ element.
Signed-off-by: Yuan-Chi Pang fu3mo6goo@gmail.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/mac80211/mesh_hwmp.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/net/mac80211/mesh_hwmp.c +++ b/net/mac80211/mesh_hwmp.c @@ -563,6 +563,10 @@ static void hwmp_preq_frame_process(stru forward = false; reply = true; target_metric = 0; + + if (SN_GT(target_sn, ifmsh->sn)) + ifmsh->sn = target_sn; + if (time_after(jiffies, ifmsh->last_sn_update + net_traversal_jiffies(sdata)) || time_before(jiffies, ifmsh->last_sn_update)) {