scsi-disk: improve the lba-out-of-range tests for read/write/verify
Improve the tests for the LBA to cover more cases. For the 16 byte opcodes, the lba is a uint64, so we need to check is to make sure that we do not wrap. For example if an opcode would specify the LBA:0xffffffffffffffff and LEN:2 then lba+len would wrap to 1. Also verify that ALL requested blocks are available, not just the first one. Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -1777,7 +1777,8 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
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if (r->req.cmd.buf[1] & 0xe0) {
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goto illegal_request;
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}
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if (r->req.cmd.lba > s->qdev.max_lba) {
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if (r->req.cmd.lba > r->req.cmd.lba + len ||
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r->req.cmd.lba + len - 1 > s->qdev.max_lba) {
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goto illegal_lba;
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}
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r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
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@ -1800,7 +1801,8 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
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if (r->req.cmd.buf[1] & 0xe0) {
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goto illegal_request;
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}
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if (r->req.cmd.lba > s->qdev.max_lba) {
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if (r->req.cmd.lba > r->req.cmd.lba + len ||
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r->req.cmd.lba + len - 1 > s->qdev.max_lba) {
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goto illegal_lba;
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}
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r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
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