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authorFelix Fietkau <nbd@nbd.name>2019-02-22 15:21:15 +0300
committerJohannes Berg <johannes.berg@intel.com>2019-02-22 16:00:40 +0300
commit51d0af222f6fa43134c6187ab4f374630f6e0d96 (patch)
treedef295a74f625bd48a3bddd55f2e25b7ce01d2ee
parent5c14a4d05f68415af9e41a4e667d1748d41d1baf (diff)
downloadlinux-51d0af222f6fa43134c6187ab4f374630f6e0d96.tar.xz
mac80211: allocate tailroom for forwarded mesh packets
Forwarded packets enter the tx path through ieee80211_add_pending_skb, which skips the ieee80211_skb_resize call. Fixes WARN_ON in ccmp_encrypt_skb and resulting packet loss. Cc: stable@vger.kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r--net/mac80211/rx.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index bb4d71efb6fb..c2a6da5d80da 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -2644,6 +2644,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
u16 ac, q, hdrlen;
+ int tailroom = 0;
hdr = (struct ieee80211_hdr *) skb->data;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
@@ -2732,8 +2733,12 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (!ifmsh->mshcfg.dot11MeshForwarding)
goto out;
+ if (sdata->crypto_tx_tailroom_needed_cnt)
+ tailroom = IEEE80211_ENCRYPT_TAILROOM;
+
fwd_skb = skb_copy_expand(skb, local->tx_headroom +
- sdata->encrypt_headroom, 0, GFP_ATOMIC);
+ sdata->encrypt_headroom,
+ tailroom, GFP_ATOMIC);
if (!fwd_skb)
goto out;