diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f294db835f4b..75b41879e9e9 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -31,6 +31,7 @@ #include <linux/llist.h> #include <linux/cma.h> #include <linux/migrate.h> +#include <linux/nospec.h> #include <asm/page.h> #include <asm/pgalloc.h> @@ -1854,6 +1855,7 @@ int PageHeadHuge(struct page *page_head) return page_head[1].compound_dtor == HUGETLB_PAGE_DTOR; } +EXPORT_SYMBOL_GPL(PageHeadHuge); /* * Find and lock address space (mapping) in write mode. @@ -3498,8 +3500,7 @@ static int demote_pool_huge_page(struct hstate *h, nodemask_t *nodes_allowed) static struct kobj_attribute _name##_attr = __ATTR_WO(_name) #define HSTATE_ATTR(_name) \ - static struct kobj_attribute _name##_attr = \ - __ATTR(_name, 0644, _name##_show, _name##_store) + static struct kobj_attribute _name##_attr = __ATTR_RW(_name) static struct kobject *hugepages_kobj; static struct kobject *hstate_kobjs[HUGE_MAX_HSTATE]; @@ -4161,7 +4162,7 @@ static int __init hugepages_setup(char *s) } if (tmp >= nr_online_nodes) goto invalid; - node = tmp; + node = array_index_nospec(tmp, nr_online_nodes); p += count + 1; /* Parse hugepages */ if (sscanf(p, "%lu%n", &tmp, &count) != 1) @@ -4637,7 +4638,6 @@ static pte_t make_huge_pte(struct vm_area_struct *vma, struct page *page, vma->vm_page_prot)); } entry = pte_mkyoung(entry); - entry = pte_mkhuge(entry); entry = arch_make_huge_pte(entry, shift, vma->vm_flags); return entry; @@ -5341,6 +5341,7 @@ static inline vm_fault_t hugetlb_handle_userfault(struct vm_area_struct *vma, pgoff_t idx, unsigned int flags, unsigned long haddr, + unsigned long addr, unsigned long reason) { vm_fault_t ret; @@ -5348,6 +5349,7 @@ static inline vm_fault_t hugetlb_handle_userfault(struct vm_area_struct *vma, struct vm_fault vmf = { .vma = vma, .address = haddr, + .real_address = addr, .flags = flags, /* @@ -5416,7 +5418,7 @@ retry: /* Check for page in userfault range */ if (userfaultfd_missing(vma)) { ret = hugetlb_handle_userfault(vma, mapping, idx, - flags, haddr, + flags, haddr, address, VM_UFFD_MISSING); goto out; } @@ -5480,7 +5482,7 @@ retry: unlock_page(page); put_page(page); ret = hugetlb_handle_userfault(vma, mapping, idx, - flags, haddr, + flags, haddr, address, VM_UFFD_MINOR); goto out; } @@ -5817,7 +5819,8 @@ int hugetlb_mcopy_atomic_pte(struct mm_struct *dst_mm, *pagep = NULL; goto out; } - folio_copy(page_folio(page), page_folio(*pagep)); + copy_user_huge_page(page, *pagep, dst_addr, dst_vma, + pages_per_huge_page(h)); put_page(*pagep); *pagep = NULL; } @@ -6171,7 +6174,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma, unsigned int shift = huge_page_shift(hstate_vma(vma)); old_pte = huge_ptep_modify_prot_start(vma, address, ptep); - pte = pte_mkhuge(huge_pte_modify(old_pte, newprot)); + pte = huge_pte_modify(old_pte, newprot); pte = arch_make_huge_pte(pte, shift, vma->vm_flags); huge_ptep_modify_prot_commit(vma, address, ptep, old_pte, pte); pages++; @@ -6889,9 +6892,9 @@ static int __init cmdline_parse_hugetlb_cma(char *p) break; if (s[count] == ':') { - nid = tmp; - if (nid < 0 || nid >= MAX_NUMNODES) + if (tmp >= MAX_NUMNODES) break; + nid = array_index_nospec(tmp, MAX_NUMNODES); s += count + 1; tmp = memparse(s, &s); |