From: Remi Pommarel <repk@triplefau.lt>
To: Johannes Berg <johannes@sipsolutions.net>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: Javier Cardona <javier@cozybit.com>,
linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, Remi Pommarel <repk@triplefau.lt>
Subject: [PATCH] mac80211: mesh: Free ie data when leaving mesh
Date: Sat, 4 Jul 2020 15:50:07 +0200 [thread overview]
Message-ID: <20200704135007.27292-1-repk@triplefau.lt> (raw)
At ieee80211_join_mesh() some ie data could have been allocated (see
copy_mesh_setup()) and need to be cleaned up when leaving the mesh.
This fixes the following kmemleak report:
unreferenced object 0xffff0000116bc600 (size 128):
comm "wpa_supplicant", pid 608, jiffies 4294898983 (age 293.484s)
hex dump (first 32 bytes):
30 14 01 00 00 0f ac 04 01 00 00 0f ac 04 01 00 0...............
00 0f ac 08 00 00 00 00 c4 65 40 00 00 00 00 00 .........e@.....
backtrace:
[<00000000bebe439d>] __kmalloc_track_caller+0x1c0/0x330
[<00000000a349dbe1>] kmemdup+0x28/0x50
[<0000000075d69baa>] ieee80211_join_mesh+0x6c/0x3b8 [mac80211]
[<00000000683bb98b>] __cfg80211_join_mesh+0x1e8/0x4f0 [cfg80211]
[<0000000072cb507f>] nl80211_join_mesh+0x520/0x6b8 [cfg80211]
[<0000000077e9bcf9>] genl_family_rcv_msg+0x374/0x680
[<00000000b1bd936d>] genl_rcv_msg+0x78/0x108
[<0000000022c53788>] netlink_rcv_skb+0xb0/0x1c0
[<0000000011af8ec9>] genl_rcv+0x34/0x48
[<0000000069e41f53>] netlink_unicast+0x268/0x2e8
[<00000000a7517316>] netlink_sendmsg+0x320/0x4c0
[<0000000069cba205>] ____sys_sendmsg+0x354/0x3a0
[<00000000e06bab0f>] ___sys_sendmsg+0xd8/0x120
[<0000000037340728>] __sys_sendmsg+0xa4/0xf8
[<000000004fed9776>] __arm64_sys_sendmsg+0x44/0x58
[<000000001c1e5647>] el0_svc_handler+0xd0/0x1a0
Fixes: c80d545da3f7 (mac80211: Let userspace enable and configure vendor specific path selection.)
Signed-off-by: Remi Pommarel <repk@triplefau.lt>
---
net/mac80211/cfg.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 9b360544ad6f..1079a07e43e4 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2166,6 +2166,7 @@ static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
ieee80211_stop_mesh(sdata);
mutex_lock(&sdata->local->mtx);
ieee80211_vif_release_channel(sdata);
+ kfree(sdata->u.mesh.ie);
mutex_unlock(&sdata->local->mtx);
return 0;
--
2.26.2
reply other threads:[~2020-07-04 13:43 UTC|newest]
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