On Fri, Aug 21, 2020 at 1:03 PM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, 21 Aug 2020 10:15:45 -0700 Yang Shi <shy828301@xxxxxxxxx> wrote: > > > It looks the vma is gone. The below patch should be able to fix it: > > > > diff --git a/mm/madvise.c b/mm/madvise.c > > index dd1d43cf026d..d4aa5f776543 100644 > > --- a/mm/madvise.c > > +++ b/mm/madvise.c > > @@ -289,9 +289,9 @@ static long madvise_willneed(struct vm_area_struct *vma, > > */ > > *prev = NULL; /* tell sys_madvise we drop mmap_lock */ > > get_file(file); > > - mmap_read_unlock(current->mm); > > offset = (loff_t)(start - vma->vm_start) > > + ((loff_t)vma->vm_pgoff << PAGE_SHIFT); > > + mmap_read_unlock(current->mm); > > vfs_fadvise(file, offset, end - start, POSIX_FADV_WILLNEED); > > fput(file); > > mmap_read_lock(current->mm); > > Oh geeze. Can you please send this along as a real patch, cc:stable, > Fixes: 692fe62433d4c? Please cc Jan! Yes, sure. Working on a real patch now.
