From 4ff3a9d14c6c06eaa4e5976c61599ea2bd9e81b2 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 14 Feb 2019 22:03:25 +0800
Subject: [PATCH] mac80211: Free mpath object when rhashtable insertion fails
Git-commit: 4ff3a9d14c6c06eaa4e5976c61599ea2bd9e81b2
Patch-mainline: v5.0-rc8
References: bsc#1051510
When rhashtable insertion fails the mesh table code doesn't free
the now-orphan mesh path object. This patch fixes that.
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
net/mac80211/mesh_pathtbl.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -448,17 +448,15 @@ struct mesh_path *mesh_path_add(struct i
} while (unlikely(ret == -EEXIST && !mpath));
- if (ret && ret != -EEXIST)
- return ERR_PTR(ret);
-
- /* At this point either new_mpath was added, or we found a
- * matching entry already in the table; in the latter case
- * free the unnecessary new entry.
- */
- if (ret == -EEXIST) {
+ if (ret) {
kfree(new_mpath);
+
+ if (ret != -EEXIST)
+ return ERR_PTR(ret);
+
new_mpath = mpath;
}
+
sdata->u.mesh.mesh_paths_generation++;
return new_mpath;
}
@@ -488,6 +486,9 @@ int mpp_path_add(struct ieee80211_sub_if
&new_mpath->rhash,
mesh_rht_params);
+ if (ret)
+ kfree(new_mpath);
+
sdata->u.mesh.mpp_paths_generation++;
return ret;
}