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dm integrity: fix a crash if "recalculate" used without "internal_hash"
Recalculate can only be specified with internal_hash. Cc: stable@vger.kernel.org # v4.19+ Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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@ -4235,6 +4235,12 @@ static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
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r = -ENOMEM;
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goto bad;
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}
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} else {
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if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
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ti->error = "Recalculate can only be specified with internal_hash";
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r = -EINVAL;
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goto bad;
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}
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}
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ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,
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