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block: Don't attach inactive child to active node

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An active node makes unrestricted use of its children and would possibly
run into assertion failures when it operates on an inactive child node.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20250204211407.381505-6-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2025-02-04 22:13:56 +01:00
parent c2a189976e
commit 9b81361aed
1 changed files with 5 additions and 0 deletions
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block.c
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@ -3183,6 +3183,11 @@ bdrv_attach_child_noperm(BlockDriverState *parent_bs,
child_bs->node_name, child_name, parent_bs->node_name);
return NULL;
}
if (bdrv_is_inactive(child_bs) && !bdrv_is_inactive(parent_bs)) {
error_setg(errp, "Inactive '%s' can't be a %s child of active '%s'",
child_bs->node_name, child_name, parent_bs->node_name);
return NULL;
}
bdrv_get_cumulative_perm(parent_bs, &perm, &shared_perm);
bdrv_child_perm(parent_bs, child_bs, NULL, child_role, NULL,