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wifi: mac80211_hwsim: Fix possible NULL dereference
author
Ilan Peer
<ilan.peer@intel.com>
Sun, 4 Jun 2023 09:11:27 +0000
(12:11 +0300)
committer
Johannes Berg
<johannes.berg@intel.com>
Tue, 6 Jun 2023 12:17:11 +0000
(14:17 +0200)
In a call to mac80211_hwsim_select_tx_link() the sta pointer might
be NULL, thus need to check that it is not NULL before accessing it.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link:
https://lore.kernel.org/r/20230604120651.f4d889fc98c4.Iae85f527ed245a37637a874bb8b8c83d79812512@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
drivers/net/wireless/virtual/mac80211_hwsim.c
patch
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diff --git
a/drivers/net/wireless/virtual/mac80211_hwsim.c
b/drivers/net/wireless/virtual/mac80211_hwsim.c
index
b06a6e7
..
c706abb
100644
(file)
--- a/
drivers/net/wireless/virtual/mac80211_hwsim.c
+++ b/
drivers/net/wireless/virtual/mac80211_hwsim.c
@@
-4,7
+4,7
@@
* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
* Copyright (c) 2011, Javier Lopez <jlopex@gmail.com>
* Copyright (c) 2016 - 2017 Intel Deutschland GmbH
- * Copyright (C) 2018 - 202
2
Intel Corporation
+ * Copyright (C) 2018 - 202
3
Intel Corporation
*/
/*
@@
-1865,7
+1865,7
@@
mac80211_hwsim_select_tx_link(struct mac80211_hwsim_data *data,
WARN_ON(is_multicast_ether_addr(hdr->addr1));
- if (WARN_ON_ONCE(!sta->valid_links))
+ if (WARN_ON_ONCE(!sta
|| !sta
->valid_links))
return &vif->bss_conf;
for (i = 0; i < ARRAY_SIZE(vif->link_conf); i++) {