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wifi: mac80211_hwsim: Fix possible NULL dereference

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[ Upstream commit 0cc80943ef518a1c51a1111e9346d1daf11dd545 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ilan Peer 2023-06-04 12:11:27 +03:00 committed by Greg Kroah-Hartman
parent 8656b31d2e
commit d0124848c7
1 changed files with 2 additions and 2 deletions
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4
drivers/net/wireless/mac80211_hwsim.c
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@ -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 - 2022 Intel Corporation
* Copyright (C) 2018 - 2023 Intel Corporation
*/
/*
@ -1753,7 +1753,7 @@ 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++) {