From 83ee79565ce81c3e8dd097be1fe46dc522e17544 Mon Sep 17 00:00:00 2001 From: Jonathan Rascher Date: Wed, 16 Jun 2021 00:30:37 -0500 Subject: [PATCH] Fix overrun in oled_write_raw when not at (0, 0) (#13204) --- drivers/oled/oled_driver.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/oled/oled_driver.c b/drivers/oled/oled_driver.c index 082115d534..53bdc196dc 100644 --- a/drivers/oled/oled_driver.c +++ b/drivers/oled/oled_driver.c @@ -491,8 +491,9 @@ void oled_write_raw(const char *data, uint16_t size) { uint16_t cursor_start_index = oled_cursor - &oled_buffer[0]; if ((size + cursor_start_index) > OLED_MATRIX_SIZE) size = OLED_MATRIX_SIZE - cursor_start_index; for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) { - if (oled_buffer[i] == data[i]) continue; - oled_buffer[i] = data[i]; + uint8_t c = *data++; + if (oled_buffer[i] == c) continue; + oled_buffer[i] = c; oled_dirty |= ((OLED_BLOCK_TYPE)1 << (i / OLED_BLOCK_SIZE)); } }