On Fri, 6 Nov 2020 12:48:05 +0100 "Christian König" <ckoenig.leichtzumerken@xxxxxxxxx> wrote: > Patch "495c10cc1c0c CHROMIUM: dma-buf: restore args..." > adds a workaround for a bug in mmap_region. > > As the comment states ->mmap() callback can change > vma->vm_file and so we might call fput() on the wrong file. > > Revert the workaround and proper fix this in mmap_region. > Seems correct, best I can tell. Presumably all ->mmap() instances will correctly fput() to original file* if they're rewriting vma->vm_file.
