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fix segmentation fault from not mapping enough

This commit is contained in:
xfnw 2021-08-19 16:22:04 -04:00
parent 4b6b4d6f9d
commit 876a56e216
1 changed files with 2 additions and 2 deletions
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4
fbflut.c
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@ -42,7 +42,7 @@ void *handle_connection(void *socket_desc) {
// strcat(colorcode, "00");
int color = (int)strtol(colorcode, NULL, 16);
if (xpos >= 0 && ypos >= 0 && xpos <= fb_width && ypos <= fb_height) {
if (xpos >= 0 && ypos >= 0 && xpos < fb_width && ypos < fb_height) {
if (color == 0) {
message = calloc(sizeof(char), 36);
asprintf(&message, "PX %i %i %X\n",xpos,ypos,fbdata[ypos*fb_length+xpos]);
@ -97,7 +97,7 @@ int main(int argc, char *argv[]) {
printf("width: %i, height: %i, bpp: %i\n", fb_width, fb_height, fb_bytes);
int fb_data_size = fb_width * fb_height * fb_bytes;
int fb_data_size = fb_length * fb_height * fb_bytes;
fbdata = mmap(0, fb_data_size, PROT_READ | PROT_WRITE, MAP_SHARED, fbfd, (off_t)0);