| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 048/343] mt76: mt7921: fix crash when startup fails. | Date | Tue, 12 Apr 2022 08:27:46 +0200 |
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From: Ben Greear <greearb@candelatech.com>
[ Upstream commit 827e7799c61b978fbc2cc9dac66cb62401b2b3f0 ]
If the nic fails to start, it is possible that the reset_work has already been scheduled. Ensure the work item is canceled so we do not have use-after-free crash in case cleanup is called before the work item is executed.
This fixes crash on my x86_64 apu2 when mt7921k radio fails to work. Radio still fails, but OS does not crash.
Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/wireless/mediatek/mt76/mt7921/main.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c index 7a8d2596c226..4abb7a6e775a 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c @@ -273,6 +273,7 @@ static void mt7921_stop(struct ieee80211_hw *hw) cancel_delayed_work_sync(&dev->pm.ps_work); cancel_work_sync(&dev->pm.wake_work); + cancel_work_sync(&dev->reset_work); mt76_connac_free_pending_tx_skbs(&dev->pm, NULL); mt7921_mutex_acquire(dev); -- 2.35.1
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