linux-kernel - Re: [syzbot] [usb?] KASAN: slab-use-after-free Write in usb_anchor_suspend

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Date: Tue,  2 Apr 2024 07:01:44 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+9a3c54f52bd1edbd975f@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [usb?] KASAN: slab-use-after-free Write in usb_anchor_suspend_wakeups (2)

On Mon, 01 Apr 2024 09:50:32 -0700
> syzbot found the following issue on:
> 
> HEAD commit:    480e035fc4c7 Merge tag 'drm-next-2024-03-13' of https://gi..
> git tree:       upstream
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1244fe29180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git  480e035fc4c7

--- x/drivers/usb/class/usbtmc.c
+++ y/drivers/usb/class/usbtmc.c
@@ -256,6 +256,7 @@ static int usbtmc_release(struct inode *
 	spin_unlock_irq(&file_data->data->dev_lock);
 	mutex_unlock(&file_data->data->io_mutex);
 
+	usb_kill_anchored_urbs(&file_data->submitted);
 	kref_put(&file_data->data->kref, usbtmc_delete);
 	file_data->data = NULL;
 	kfree(file_data);
--