diff options
| author | Martin Pieuchot <mpi@cvs.openbsd.org> | 2013-05-17 09:14:09 +0000 |
|---|---|---|
| committer | Martin Pieuchot <mpi@cvs.openbsd.org> | 2013-05-17 09:14:09 +0000 |
| commit | 6e839ba3fc47f57042b29a8529472014f2a061e6 (patch) | |
| tree | 3905f75af5fbc27d16683af7d6bb28eb4b912023 /sys/dev/usb | |
| parent | d765da51bd2fca90693f6a9b3959f4612e5c0db6 (diff) | |
Make it clear that the code related to a transfer submission doesn't
leak anything to userland because it doesn't set the USBD_SHORT_XFER_OK
flag.
Also prevent a bad copy/paste from introducing a similar issue by using
the actual transferred length instead of the requested one in uiomove().
ok miod@
Diffstat (limited to 'sys/dev/usb')
| -rw-r--r-- | sys/dev/usb/urio.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/sys/dev/usb/urio.c b/sys/dev/usb/urio.c index bf6feeb72dc..ac202ed2b5d 100644 --- a/sys/dev/usb/urio.c +++ b/sys/dev/usb/urio.c @@ -1,4 +1,4 @@ -/* $OpenBSD: urio.c,v 1.41 2013/04/15 09:23:02 mglocker Exp $ */ +/* $OpenBSD: urio.c,v 1.42 2013/05/17 09:14:08 mpi Exp $ */ /* $NetBSD: urio.c,v 1.15 2002/10/23 09:14:02 jdolecek Exp $ */ /* @@ -427,7 +427,6 @@ urioioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) struct uio uio; usb_device_request_t req; usbd_status err; - int req_flags = 0; u_int32_t req_actlen = 0; void *ptr = NULL; int error = 0; @@ -492,7 +491,7 @@ urioioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) sc->sc_refcnt++; - err = usbd_do_request_flags(sc->sc_udev, &req, ptr, req_flags, + err = usbd_do_request_flags(sc->sc_udev, &req, ptr, 0, &req_actlen, USBD_DEFAULT_TIMEOUT); if (--sc->sc_refcnt < 0) @@ -501,8 +500,8 @@ urioioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) if (err) { error = EIO; } else { - if (len != 0 && uio.uio_rw == UIO_READ) - error = uiomove(ptr, len, &uio); + if (req_actlen != 0 && uio.uio_rw == UIO_READ) + error = uiomove(ptr, req_actlen, &uio); } ret: |