diff options
| -rw-r--r-- | sys/kern/kern_physio.c | 16 |
1 files changed, 1 insertions, 15 deletions
diff --git a/sys/kern/kern_physio.c b/sys/kern/kern_physio.c index aebbbdb..9a28936 100644 --- a/sys/kern/kern_physio.c +++ b/sys/kern/kern_physio.c @@ -88,25 +88,11 @@ physio(dev_t dev, struct uio *uio, int ioflag) bp->b_blkno = btodb(bp->b_offset); - if (uio->uio_segflg == UIO_USERSPACE) { - /* - * Note that useracc() alone is not a - * sufficient test. vmapbuf() can still fail - * due to a smaller file mapped into a larger - * area of VM, or if userland races against - * vmapbuf() after the useracc() check. - */ - if (!useracc(bp->b_data, bp->b_bufsize, - bp->b_iocmd == BIO_READ ? - VM_PROT_WRITE : VM_PROT_READ)) { - error = EFAULT; - goto doerror; - } + if (uio->uio_segflg == UIO_USERSPACE) if (vmapbuf(bp) < 0) { error = EFAULT; goto doerror; } - } DEV_STRATEGY(bp); spl = splbio(); |
