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macio: fix overflow in lba to offset conversion for ATAPI devices 

As the IDEState lba field is an int32_t, make sure we cast to int64_t before
shifting to calculate the offset. Otherwise we end up with an overflow when
trying to access sectors beyond 2GB as can occur when using DVD images.

[Maintainer edit: fixed extraneous parentheses. --js]

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 1451928613-29476-1-git-send-email-mark.cave-ayland@ilande.co.uk
Signed-off-by: John Snow <jsnow@redhat.com>
master
Mark Cave-Ayland 2016-01-11 14:10:42 -05:00 committed by John Snow
parent 7b8a354d47
commit 97225170f6
1 changed files with 1 additions and 1 deletions
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2
hw/ide/macio.c
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@ -280,7 +280,7 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
}
/* Calculate current offset */
offset = (int64_t)(s->lba << 11) + s->io_buffer_index;
offset = ((int64_t)s->lba << 11) + s->io_buffer_index;
pmac_dma_read(s->blk, offset, io->len, pmac_ide_atapi_transfer_cb, io);
return;