linux-kernel - [PATCH 4.19 088/116] staging: wlan-ng: fix ODEBUG bug in prism2sta_disconnect

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Date:   Wed,  1 Apr 2020 18:17:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        syzbot+6d2e7f6fa90e27be9d62@...kaller.appspotmail.com,
        Qiujun Huang <hqjagain@...il.com>
Subject: [PATCH 4.19 088/116] staging: wlan-ng: fix ODEBUG bug in prism2sta_disconnect_usb

From: Qiujun Huang <hqjagain@...il.com>

commit a1f165a6b738f0c9d744bad4af7a53909278f5fc upstream.

We should cancel hw->usb_work before kfree(hw).

Reported-by: syzbot+6d2e7f6fa90e27be9d62@...kaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@...il.com>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/1585120006-30042-1-git-send-email-hqjagain@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/wlan-ng/prism2usb.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/staging/wlan-ng/prism2usb.c
+++ b/drivers/staging/wlan-ng/prism2usb.c
@@ -180,6 +180,7 @@ static void prism2sta_disconnect_usb(str
 
 		cancel_work_sync(&hw->link_bh);
 		cancel_work_sync(&hw->commsqual_bh);
+		cancel_work_sync(&hw->usb_work);
 
 		/* Now we complete any outstanding commands
 		 * and tell everyone who is waiting for their