Fix a bug in CD9660 when vmiodirenable is turned on. CD9660 was assuming

that a buffer's b_blkno would be valid.  This is true when vmiodirenable
is turned off because the B_MALLOC'd buffer's data is invalidated when
the buffer is destroyed.  But when vmiodirenable is turned on a buffer
can be reconstituted from its VMIO backing store.  The reconstituted buffer
will have no knowledge of the physical block translation and the result is
serious directory corruption of the CDROM.

The solution is to fix cd9660_blkatoff() to always BMAP the buffer if
b_lblkno == b_blkno.

MFC after:	0 days

0 files changed, 0 insertions, 0 deletions