Am 06.11.20 um 23:48 schrieb Andrew Morton:
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.
Yes, exactly.
Patch #2 provides a helper to make sure that everybody gets the
get_file()/fput() correctly while updating vma->vm_file.
Can I add your acked-by to the patches and push them upstream through
drm-misc-next?
Thanks,
Christian.
