diff options
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/pmap.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index f5a129f50d21..2f87b1bac050 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -6219,7 +6219,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) PMAP_LOCK(pmap); for (; sva < eva; sva = va_next) { pml4e = pmap_pml4e(pmap, sva); - if ((*pml4e & PG_V) == 0) { + if (pml4e == NULL || (*pml4e & PG_V) == 0) { va_next = (sva + NBPML4) & ~PML4MASK; if (va_next < sva) va_next = eva; @@ -6502,7 +6502,7 @@ restart: if (!pmap_pkru_same(pmap, va, va + NBPDP)) return (KERN_PROTECTION_FAILURE); pml4e = pmap_pml4e(pmap, va); - if ((*pml4e & PG_V) == 0) { + if (pml4e == NULL || (*pml4e & PG_V) == 0) { mp = _pmap_allocpte(pmap, pmap_pml4e_pindex(va), NULL, va); if (mp == NULL) { @@ -7363,7 +7363,7 @@ pmap_unwire(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) PMAP_LOCK(pmap); for (; sva < eva; sva = va_next) { pml4e = pmap_pml4e(pmap, sva); - if ((*pml4e & PG_V) == 0) { + if (pml4e == NULL || (*pml4e & PG_V) == 0) { va_next = (sva + NBPML4) & ~PML4MASK; if (va_next < sva) va_next = eva; @@ -7488,7 +7488,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len, ("pmap_copy: invalid to pmap_copy page tables")); pml4e = pmap_pml4e(src_pmap, addr); - if ((*pml4e & PG_V) == 0) { + if (pml4e == NULL || (*pml4e & PG_V) == 0) { va_next = (addr + NBPML4) & ~PML4MASK; if (va_next < addr) va_next = end_addr; @@ -8571,7 +8571,7 @@ pmap_advise(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, int advice) PMAP_LOCK(pmap); for (; sva < eva; sva = va_next) { pml4e = pmap_pml4e(pmap, sva); - if ((*pml4e & PG_V) == 0) { + if (pml4e == NULL || (*pml4e & PG_V) == 0) { va_next = (sva + NBPML4) & ~PML4MASK; if (va_next < sva) va_next = eva; @@ -9795,6 +9795,8 @@ pmap_get_mapping(pmap_t pmap, vm_offset_t va, uint64_t *ptr, int *num) PMAP_LOCK(pmap); pml4 = pmap_pml4e(pmap, va); + if (pml4 == NULL) + goto done; ptr[idx++] = *pml4; if ((*pml4 & PG_V) == 0) goto done; @@ -10893,7 +10895,7 @@ pmap_pkru_update_range(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, for (changed = false, va = sva; va < eva; va = va_next) { pml4e = pmap_pml4e(pmap, va); - if ((*pml4e & X86_PG_V) == 0) { + if (pml4e == NULL || (*pml4e & X86_PG_V) == 0) { va_next = (va + NBPML4) & ~PML4MASK; if (va_next < va) va_next = eva; |