diff options
author | Shuah Khan <[email protected]> | 2020-10-06 16:39:14 -0600 |
---|---|---|
committer | Greg Kroah-Hartman <[email protected]> | 2020-10-07 09:25:48 +0200 |
commit | 9e8586827a7061fdb183e6571fac63af378be013 (patch) | |
tree | 19e5f532b74b2be75a5d1114267f28ec59414469 | |
parent | a4f88430af896bf34ec25a7a5f0e053fb3d928e0 (diff) |
usbip: vhci_hcd: fix calling usb_hcd_giveback_urb() with irqs enabled
kcov testing uncovered call to usb_hcd_giveback_urb() without disabling
interrupts.
Link: https://lore.kernel.org/linux-usb/CAAeHK+wb4k-LGTjK9F5YbJNviF_+yU+wE_=Vpo9Rn7KFN8vG6Q@mail.gmail.com/
usb_hcd_giveback_urb() is called from vhci's urb_enqueue, when it
determines it doesn't need to xmit the urb and can give it back.
This path runs in task context.
Disable irqs around usb_hcd_giveback_urb() call.
Reported-by: Andrey Konovalov <[email protected]>
Suggested-by: Alan Stern <[email protected]>
Acked-by: Andrey Konovalov <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
-rw-r--r-- | drivers/usb/usbip/vhci_hcd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index 1b598db5d8b9..66cde5e5f796 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -797,8 +797,14 @@ no_need_xmit: usb_hcd_unlink_urb_from_ep(hcd, urb); no_need_unlink: spin_unlock_irqrestore(&vhci->lock, flags); - if (!ret) + if (!ret) { + /* usb_hcd_giveback_urb() should be called with + * irqs disabled + */ + local_irq_disable(); usb_hcd_giveback_urb(hcd, urb, urb->status); + local_irq_enable(); + } return ret; } |