fixup: mm/gup: remove record_subpages()

pages is not adjusted by the caller, but indexed by existing *nr.

Link: https://lkml.kernel.org/r/cc7f03f8-da8b-407e-a03a-e8e5a9ec5462@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reported-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com
Tested-by: syzbot+1ab243d3eebb2aabf4a4@syzkaller.appspotmail.com
Reported-by: Jens Axboe <axboe@kernel.dk>
Tested-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/gup.c b/mm/gup.c
index 2db2cfd0ec9f520a3753f5fda68a02bd6d1de7df..b8aee964421cec053cd61eff1646110e0ce67993 100644 (file)
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -2979,6 +2979,7 @@ static int gup_fast_pmd_leaf(pmd_t orig, pmd_t *pmdp, unsigned long addr,
                return 0;
        }
 
+       pages += *nr;
        *nr += refs;
        for (; refs; refs--)
                *(pages++) = page++;
@@ -3022,6 +3023,7 @@ static int gup_fast_pud_leaf(pud_t orig, pud_t *pudp, unsigned long addr,
                return 0;
        }
 
+       pages += *nr;
        *nr += refs;
        for (; refs; refs--)
                *(pages++) = page++;