989201bb8c
commit 566f9c9f89337792070b5a6062dff448b3e7977f upstream. When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called. Reported-by: syzbot+14b0e8f3fd1612e35350@syzkaller.appspotmail.com Cc: stable <stable@kernel.org> Tested-by: Khalid Masum <khalid.masum.92@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de> Link: https://lore.kernel.org/r/YuV9apZGNmGfjcor@p100 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| .gitignore | ||
| Makefile | ||
| conmakehash.c | ||
| consolemap.c | ||
| cp437.uni | ||
| defkeymap.c_shipped | ||
| defkeymap.map | ||
| keyboard.c | ||
| selection.c | ||
| vc_screen.c | ||
| vt.c | ||
| vt_ioctl.c | ||