korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-15 06:55:13 +08:00
Code Issues Packages Projects Releases Wiki Activity

USB: serial: sierra: fix potential deadlock at close

Browse Source 
The portdata spinlock can be taken in interrupt context (via
sierra_outdat_callback()).
Disable interrupts when taking the portdata spinlock when discarding
deferred URBs during close to prevent a possible deadlock.

Fixes: 014333f77c ("USB: sierra: fix urb and memory leak on disconnect")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
[ johan: amend commit message and add fixes and stable tags ]
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
John Ogness 2018-06-24 00:32:11 +02:00 committed by Johan Hovold
parent 2ba02c8dd0
commit e60870012e
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/serial/sierra.c
View File

@ -770,9 +770,9 @@ static void sierra_close(struct usb_serial_port *port)
kfree(urb->transfer_buffer);
usb_free_urb(urb);
usb_autopm_put_interface_async(serial->interface);
spin_lock(&portdata->lock);
spin_lock_irq(&portdata->lock);
portdata->outstanding_urbs--;
spin_unlock(&portdata->lock);
spin_unlock_irq(&portdata->lock);
}
sierra_stop_rx_urbs(port);