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authorOliver Neukum <oneukum@suse.de>2014-08-01 09:55:20 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-08-01 16:01:46 -0700
commitd310d05f1225d1f6f2bf505255fdf593bfbb3051 (patch)
tree561d579967a741e32fec5c65d7b1140c9a785903 /drivers/usb/core
parent43508be512661c905d0320ee73e0b65ef36d2459 (diff)
downloadlinux-stericsson-d310d05f1225d1f6f2bf505255fdf593bfbb3051.tar.gz
USB: devio: fix issue with log flooding
usbfs allows user space to pass down an URB which sets URB_SHORT_NOT_OK for output URBs. That causes usbcore to log messages without limit for a nonsensical disallowed combination. The fix is to silently drop the attribute in usbfs. The problem is reported to exist since 3.14 https://www.virtualbox.org/ticket/13085 Signed-off-by: Oliver Neukum <oneukum@suse.de> CC: stable@vger.kernel.org Acked-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/devio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 257876ea03a1..0b59731c3021 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1509,7 +1509,7 @@ static int proc_do_submiturb(struct usb_dev_state *ps, struct usbdevfs_urb *uurb
u = (is_in ? URB_DIR_IN : URB_DIR_OUT);
if (uurb->flags & USBDEVFS_URB_ISO_ASAP)
u |= URB_ISO_ASAP;
- if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
+ if (uurb->flags & USBDEVFS_URB_SHORT_NOT_OK && is_in)
u |= URB_SHORT_NOT_OK;
if (uurb->flags & USBDEVFS_URB_NO_FSBR)
u |= URB_NO_FSBR;