dm log: ensure log bitmap fits on log device
Check that the log bitmap will fit within the log device. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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@ -457,6 +457,14 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
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*/
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buf_size = dm_round_up((LOG_OFFSET << SECTOR_SHIFT) +
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bitset_size, ti->limits.hardsect_size);
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if (buf_size > dev->bdev->bd_inode->i_size) {
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DMWARN("log device %s too small: need %llu bytes",
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dev->name, (unsigned long long)buf_size);
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kfree(lc);
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return -EINVAL;
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}
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lc->header_location.count = buf_size >> SECTOR_SHIFT;
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lc->io_req.mem.type = DM_IO_VMA;
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