We sometimes see a "BUG task_struct (Not tainted): Padding overwritten" on s390, directly after running debug_vm_pgtable. This is because of wrong vaddr alignment in pmd/pud_advanced_tests(), leading to memory corruption at least on s390, see patch description. At first glance, other architectures do not seem to care about vaddr in their xxx_get_and_clear() implementations, so they should not be affected. One exception is sparc, where the addr is passed over to some tlb_batch code, but I'm not sure what implication the wrongly aligned vaddr would have in this case. Also adding linux-arch, just to make sure. Gerald Schaefer (1): mm/debug_vm_pgtable: fix alignment for pmd/pud_advanced_tests() mm/debug_vm_pgtable.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.25.1
