From 1c8d80125142294052e808df6aedce53fb2d0ed8 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 11 Dec 2023 09:05:32 +0200 Subject: [PATCH] wifi: mac80211: mesh: check element parsing succeeded [ Upstream commit 1fc4a3eec50d726f4663ad3c0bb0158354d6647a ] ieee802_11_parse_elems() can return NULL, so we must check for the return value. Fixes: 5d24828d05f3 ("mac80211: always allocate struct ieee802_11_elems") Signed-off-by: Johannes Berg Signed-off-by: Miri Korenblit Link: https://msgid.link/20231211085121.93dea364f3d3.Ie87781c6c48979fb25a744b90af4a33dc2d83a28@changeid Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/mesh_plink.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c index a1e526419e9d..5c8a3ff0ae0c 100644 --- a/net/mac80211/mesh_plink.c +++ b/net/mac80211/mesh_plink.c @@ -1243,6 +1243,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, return; } elems = ieee802_11_parse_elems(baseaddr, len - baselen, true, NULL); - mesh_process_plink_frame(sdata, mgmt, elems, rx_status); - kfree(elems); + if (elems) { + mesh_process_plink_frame(sdata, mgmt, elems, rx_status); + kfree(elems); + } }