27 lines
771 B
Markdown
27 lines
771 B
Markdown
# Test Case: Truncated metabox super extension
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**Test ID**: TC136-metabox-truncated-super-extension
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**Fixtures**: `bad-metabox-truncated-extension.erofs`, `bad-ishare-prefix-id.erofs`
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## Objective
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Reject `METABOX` when `sb_extslots=0` leaves `metabox_nid` undeclared, and
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reject `ISHARE_XATTRS` when its prefix ID equals `xattr_prefix_count`.
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## Manual steps
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For each image, attach it and trace the read-only mount:
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```sh
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truss -f -o /tmp/tc136.truss mount -t erofs -o ro \
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/dev/${unit} /mnt/repo22-g4
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grep nmount /tmp/tc136.truss
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mount | grep repo22-g4 || true
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mdconfig -d -u "${unit#md}"
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```
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## Expected results
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Both `nmount` calls return `EINTEGRITY` (97). The extension bytes are not
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consumed, no mount appears, and detach succeeds without a vnode/md leak.
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