The patch titled
Subject: userfaultfd: provide unmasked address on page-fault
has been added to the -mm tree. Its filename is
userfaultfd-provide-unmasked-address-on-page-fault-v3.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/userfaultfd-provide-unmasked-address-on-page-fault-v3.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/userfaultfd-provide-unmasked-address-on-page-fault-v3.patch
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------------------------------------------------------
From: Nadav Amit <namit@xxxxxxxxxx>
Subject: userfaultfd: provide unmasked address on page-fault
initialize real_address on all code paths, per Jan
Link: https://lkml.kernel.org/r/20220226022655.350562-1-namit@xxxxxxxxxx
Signed-off-by: Nadav Amit <namit@xxxxxxxxxx>
Acked-by: Peter Xu <peterx@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 6 ++++--
mm/swapfile.c | 1 +
2 files changed, 5 insertions(+), 2 deletions(-)
--- a/mm/hugetlb.c~userfaultfd-provide-unmasked-address-on-page-fault-v3
+++ a/mm/hugetlb.c
@@ -5341,6 +5341,7 @@ static inline vm_fault_t hugetlb_handle_
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_
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;
}
--- a/mm/swapfile.c~userfaultfd-provide-unmasked-address-on-page-fault-v3
+++ a/mm/swapfile.c
@@ -1951,6 +1951,7 @@ static int unuse_pte_range(struct vm_are
struct vm_fault vmf = {
.vma = vma,
.address = addr,
+ .real_address = addr,
.pmd = pmd,
};
_
Patches currently in -mm which might be from namit@xxxxxxxxxx are
userfaultfd-mark-uffd_wp-regardless-of-vm_write-flag.patch
userfaultfd-provide-unmasked-address-on-page-fault.patch
userfaultfd-provide-unmasked-address-on-page-fault-v3.patch
