6 Nov
2020
6 Nov
'20
10:48 p.m.
On Fri, 6 Nov 2020 12:48:05 +0100 "Christian König" ckoenig.leichtzumerken@gmail.com 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.