Am 10.10.20 um 00:25 schrieb Jason Gunthorpe:
On Fri, Oct 09, 2020 at 03:04:20PM -0700, Andrew Morton wrote:
On Fri, 9 Oct 2020 17:03:37 +0200 "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.
Doesn't this patch series address the same thing as
https://lkml.kernel.org/r/20200916090733.31427-1-linmiaohe@xxxxxxxxxx?
Same basic issue, looks like both of these patches should be combined
to plug it fully.
Yes, agree completely.
It's a different error path, but we need to fix both occasions.
Christian.
Jason
