This series fixes possible out-of-bound memory accesses when users trigger screen resolutions changes with invalid input parameters, e.g. reconfigures screen which is smaller than the current font size, or if the virtual screen size is smaller than the physical screen size. Changes in v3 (all feedback from Geert): - Drop WARNING, instead just use pr_warn() to report if driver failed to adjust xres_virtual or yres_virtual - Use EXPORT_SYMBOL_GPL() - fbcon_modechange_possible() allows changes for non-text screens Changes in v2: - don't fixup wrong xy_vres values, but instead print warning. - add Reviewed-by tags, minor variable name fixes Helge Deller (4): fbcon: Disallow setting font bigger than screen size fbcon: Prevent that screen size is smaller than font size fbmem: Check virtual screen sizes in fb_set_var() fbcon: Use fbcon_info_from_console() in fbcon_modechange_possible() drivers/video/fbdev/core/fbcon.c | 33 ++++++++++++++++++++++++++++++++ drivers/video/fbdev/core/fbmem.c | 15 ++++++++++++++- include/linux/fbcon.h | 4 ++++ 3 files changed, 51 insertions(+), 1 deletion(-) -- 2.35.3
