Description: mm/debug_vm_pgtable: fix BUG_ON with pud advanced test
References:
Notes:
 carnil> Introduced in 27af67f35631 ("powerpc/book3s64/mm: enable transparent pud
 carnil> hugepage"). Vulnerable versions: 6.6-rc1.
Bugs:
upstream: released (6.8-rc7) [720da1e593b85a550593b415bf1d79a053133451]
6.8-upstream-stable: N/A "Fixed before branching point"
6.7-upstream-stable: released (6.7.9) [eeeddf85fc58d48c58ad916e4ca12363ebd8ab21]
6.6-upstream-stable: released (6.6.21) [d2a9510c0e39d06f5544075c13040407bdbf2803]
6.1-upstream-stable: N/A "Vulnerable code not present"
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: released (6.7.9-1)
6.1-bookworm-security: N/A "Vulnerable code not present"
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"