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wifi: mac80211: ensure sdata->work is canceled before initialized.

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This wiphy work is canceled when the iface is stopped,
and shouldn't be queued for a non-running iface.
If it happens to be queued for a non-running iface (due to a bug)
it can cause a corruption of wiphy_work_list when ieee80211_setup_sdata
is called. Make sure to cancel it in this case and warn on.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Link: https://patch.msgid.link/20250205110958.99204c767c10.I84ce27a239059f6009cee197b252549a11426046@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Miri Korenblit 2025-02-05 11:39:26 +02:00 committed by Johannes Berg
parent a883ad479d
commit 6c93fd5020
1 changed files with 4 additions and 1 deletions
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5
net/mac80211/iface.c
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@ -8,7 +8,7 @@
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (c) 2016 Intel Deutschland GmbH
* Copyright (C) 2018-2024 Intel Corporation
* Copyright (C) 2018-2025 Intel Corporation
*/
#include <linux/slab.h>
#include <linux/kernel.h>
@ -804,6 +804,9 @@ static void ieee80211_set_multicast_list(struct net_device *dev)
*/
static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
{
if (WARN_ON(!list_empty(&sdata->work.entry)))
wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
/* free extra data */
ieee80211_free_keys(sdata, false);