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. v6: - final version - added all missing: Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> v5: - swapped patch #2 and #3 - modified patch #3 to use registered_fb[con2fb_map[i]] instead of fbcon_info_from_console(). This is necessary that the patch can be cleanly pushed back to v5.4 - added cleanup patch #4 to fix up patch #3 again to use fbcon_info_from_console() for v5.19+ v4: - merged former patch #2 and #3 - added more Reviewed-by - new patch #2 needs more testing. Note added to comit message that another patch needs to be backport as well. Helge Deller (4): fbcon: Disallow setting font bigger than screen size fbmem: Prevent invalid virtual screen sizes fbcon: Prevent that screen size is smaller than font size fbcon: Use fbcon_info_from_console() in fbcon_modechange_possible() drivers/video/fbdev/core/fbcon.c | 32 ++++++++++++++++++++++++++++++++ drivers/video/fbdev/core/fbmem.c | 10 +++++++++- include/linux/fbcon.h | 4 ++++ 3 files changed, 45 insertions(+), 1 deletion(-) -- 2.35.3
