6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Felix Fietkau <nbd@xxxxxxxx>
commit e26c0946a5c1aa4d27f8dfe78f2a72b4550df91f upstream.
When forwarding is set to 0, frames are typically sent with ttl=1.
Move the ttl decrement check below the check for local receive in order to
fix packet drops.
Reported-by: Thomas Hühn <thomas.huehn@xxxxxxxxxxxxxxxx>
Reported-by: Nick Hainke <vincent@xxxxxxxxxxxx>
Fixes: 986e43b19ae9 ("wifi: mac80211: fix receiving A-MSDU frames on mesh interfaces")
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Link: https://lore.kernel.org/r/20230326151709.17743-1-nbd@xxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/rx.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2774,14 +2774,6 @@ ieee80211_rx_mesh_data(struct ieee80211_
if (sdata->crypto_tx_tailroom_needed_cnt)
tailroom = IEEE80211_ENCRYPT_TAILROOM;
- if (!--mesh_hdr->ttl) {
- if (multicast)
- goto rx_accept;
-
- IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
- return RX_DROP_MONITOR;
- }
-
if (mesh_hdr->flags & MESH_FLAGS_AE) {
struct mesh_path *mppath;
char *proxied_addr;
@@ -2812,6 +2804,14 @@ ieee80211_rx_mesh_data(struct ieee80211_
if (ether_addr_equal(sdata->vif.addr, eth->h_dest))
goto rx_accept;
+ if (!--mesh_hdr->ttl) {
+ if (multicast)
+ goto rx_accept;
+
+ IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
+ return RX_DROP_MONITOR;
+ }
+
if (!ifmsh->mshcfg.dot11MeshForwarding) {
if (is_multicast_ether_addr(eth->h_dest))
goto rx_accept;
