Takashi Iwai f1d91f0e9d fbdev: Fix invalid page access after closing deferred I/O devices ... commit 3efc61d952 upstream. When a fbdev with deferred I/O is once opened and closed, the dirty pages still remain queued in the pageref list, and eventually later those may be processed in the delayed work. This may lead to a corruption of pages, hitting an Oops. This patch makes sure to cancel the delayed work and clean up the pageref list at closing the device for addressing the bug. A part of the cleanup code is factored out as a new helper function that is called from the common fb_release(). Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Tested-by: Miko Larsson <mikoxyzzz@gmail.com> Fixes: 56c134f7f1 ("fbdev: Track deferred-I/O pages in pageref struct") Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230129082856.22113-1-tiwai@suse.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-02-22 12:59:46 +01:00
..
bitblit.c
cfbcopyarea.c
cfbfillrect.c
cfbimgblt.c
fb_cmdline.c
fb_ddc.c
fb_defio.c	fbdev: Fix invalid page access after closing deferred I/O devices	2023-02-22 12:59:46 +01:00
fb_draw.h
fb_notify.c
fb_sys_fops.c
fbcmap.c
fbcon_ccw.c
fbcon_cw.c
fbcon_rotate.c
fbcon_rotate.h
fbcon_ud.c
fbcon.c	fbcon: Check font dimension limits	2023-02-09 11:28:15 +01:00
fbcon.h
fbcvt.c
fbmem.c	fbdev: Fix invalid page access after closing deferred I/O devices	2023-02-22 12:59:46 +01:00
fbmon.c
fbsysfs.c	fbdev: fbcon: Destroy mutex on freeing struct fb_info	2022-08-24 21:47:08 +02:00
Makefile
modedb.c
softcursor.c
svgalib.c
syscopyarea.c
sysfillrect.c
sysimgblt.c
tileblit.c