summaryrefslogtreecommitdiff
path: root/drivers/oled
diff options
context:
space:
mode:
authorJonathan Rascher <jon@bcat.name>2021-06-16 00:30:37 -0500
committerGitHub <noreply@github.com>2021-06-15 22:30:37 -0700
commit83ee79565ce81c3e8dd097be1fe46dc522e17544 (patch)
treef5abd7a3eaf62aa0f139647981b3ac013b39628a /drivers/oled
parent5c3991cb90108115a269e0b9f7e4b71019851cc1 (diff)
downloadqmk_firmware-83ee79565ce81c3e8dd097be1fe46dc522e17544.tar.gz
qmk_firmware-83ee79565ce81c3e8dd097be1fe46dc522e17544.zip
Fix overrun in oled_write_raw when not at (0, 0) (#13204)
Diffstat (limited to 'drivers/oled')
-rw-r--r--drivers/oled/oled_driver.c5
1 files 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));
}
}