Hello everyone, I was messing around in the GRUB command line and I found two related integer underflows that occur on all platforms. I also found an out-of-bounds write that occurs only on i386 systems using the VGA text terminal. This out-of-bounds write is caused by one of the underflows, but I've included 2 patches so that each bug is fixed.
This is my first patch submission for GRUB, so please let me know if there is anything I should change or fix. I really appreciate feedback! Thanks to Daniel Kiper for helping me figure out the process of submitting a patch. :) Ryan Cohen (2): vga_text: Prevent out-of-bounds writes to VGA text buffer cmdline: Fix two related integer underflows grub-core/normal/cmdline.c | 7 ++++++- grub-core/term/i386/pc/vga_text.c | 3 ++- 2 files changed, 8 insertions(+), 2 deletions(-) -- 2.38.1 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
