From 6dccbc9f3e1d38565dff7730d2b7d1e8b16c9b09 Mon Sep 17 00:00:00 2001 From: Peddolla Harshavardhan Reddy Date: Thu, 5 Mar 2026 21:36:59 +0530 Subject: [PATCH] wifi: cfg80211: cancel pmsr_free_wk in cfg80211_pmsr_wdev_down When the nl80211 socket that originated a PMSR request is closed, cfg80211_release_pmsr() sets the request's nl_portid to zero and schedules pmsr_free_wk to process the abort asynchronously. If the interface is concurrently torn down before that work runs, cfg80211_pmsr_wdev_down() calls cfg80211_pmsr_process_abort() directly. However, the already- scheduled pmsr_free_wk work item remains pending and may run after the interface has been removed from the driver. This could cause the driver's abort_pmsr callback to operate on a torn-down interface, leading to undefined behavior and potential crashes. Cancel pmsr_free_wk synchronously in cfg80211_pmsr_wdev_down() before calling cfg80211_pmsr_process_abort(). This ensures any pending or in-progress work is drained before interface teardown proceeds, preventing the work from invoking the driver abort callback after the interface is gone. Fixes: 9bb7e0f24e7e ("cfg80211: add peer measurement with FTM initiator API") Signed-off-by: Peddolla Harshavardhan Reddy Link: https://patch.msgid.link/20260305160712.1263829-3-peddolla.reddy@oss.qualcomm.com Signed-off-by: Johannes Berg --- net/wireless/pmsr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/wireless/pmsr.c b/net/wireless/pmsr.c index 44bd88c9ea66..50e8e19aa366 100644 --- a/net/wireless/pmsr.c +++ b/net/wireless/pmsr.c @@ -664,6 +664,7 @@ void cfg80211_pmsr_wdev_down(struct wireless_dev *wdev) } spin_unlock_bh(&wdev->pmsr_lock); + cancel_work_sync(&wdev->pmsr_free_wk); if (found) cfg80211_pmsr_process_abort(wdev);