[PATCH 0/4] fbdev: defio: Protect against device/module removal

[Thomas Zimmermann <tzimmermann@suse.de>]

There's a long-standing bug in defio where the framebuffer device or
module gets removed while mmap'ed areas of the framebuffer memory
persists in userspace. Page faults in the area then operate on defined
state.

Patches 1 and 2 fix these problems. Patches 3 and 4 build upon the fix
and put defio state into the correct places.

Thomas Zimmermann (4):
  fbdev: defio: Disconnect deferred I/O from the lifetime of struct
    fb_info
  fbdev: defio: Keep module reference from VMAs
  fbdev: defio: Move variable state into struct fb_deferred_io_state
  fbdev: defio: Move pageref array to struct fb_deferred_io_state

 drivers/video/fbdev/core/fb_defio.c | 266 ++++++++++++++++++++--------
 include/linux/fb.h                  |   9 +-
 2 files changed, 195 insertions(+), 80 deletions(-)


base-commit: a3ecd278f9a05323fab7471760a7ea10081251d6
-- 
2.52.0