diff options
| -rw-r--r-- | sys/kern/kern_physio.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sys/kern/kern_physio.c b/sys/kern/kern_physio.c index 3455f99..aae8ee9 100644 --- a/sys/kern/kern_physio.c +++ b/sys/kern/kern_physio.c @@ -16,7 +16,7 @@ * 4. Modifications may be freely made to this file if the above conditions * are met. * - * $Id: kern_physio.c,v 1.35 1999/06/26 02:46:02 mckusick Exp $ + * $Id: kern_physio.c,v 1.36 1999/08/14 11:40:42 phk Exp $ */ #include <sys/param.h> @@ -57,6 +57,7 @@ physio(bp, dev, rw, minp, uio) int error; int spl; caddr_t sa; + off_t blockno; int bp_alloc = (bp == 0); struct buf *bpa; @@ -95,7 +96,12 @@ physio(bp, dev, rw, minp, uio) * for the temporary kernel mapping. */ bp->b_saveaddr = sa; - bp->b_blkno = btodb(uio->uio_offset); + blockno = uio->uio_offset >> DEV_BSHIFT; + bp->b_blkno = blockno; + if (bp->b_blkno != blockno) { + error = EINVAL; + goto doerror; + } bp->b_offset = uio->uio_offset; if (uio->uio_segflg == UIO_USERSPACE) { |
