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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 |
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