On Thu, Sep 26, 2019 at 04:49:23PM +0300, Kirill A. Shutemov wrote: > It happens if the VMA got unmapped under us while we dropped mmap_sem > and inode got freed. > > Pinning the file if we drop mmap_sem fixes the issue. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > Reported-by: syzbot+03ee87124ee05af991bd@xxxxxxxxxxxxxxxxxxxxxxxxx > Cc: Hillf Danton <hdanton@xxxxxxxx> > Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> > Cc: Hugh Dickins <hughd@xxxxxxxxxx> Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
