131 lines
3.7 KiB
Diff
131 lines
3.7 KiB
Diff
diff -urNp old/plug-ins/file-fli/fli.c new/plug-ins/file-fli/fli.c
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--- old/plug-ins/file-fli/fli.c 2018-01-04 12:19:54.714139464 +0100
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+++ new/plug-ins/file-fli/fli.c 2018-01-04 12:34:18.568323629 +0100
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@@ -25,6 +25,8 @@
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#include "config.h"
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+#include <glib/gstdio.h>
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+
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#include <string.h>
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#include <stdio.h>
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@@ -461,23 +463,27 @@ void fli_read_brun(FILE *f, s_fli_header
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unsigned short yc;
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unsigned char *pos;
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for (yc=0; yc < fli_header->height; yc++) {
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- unsigned short xc, pc, pcnt;
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+ unsigned short pc, pcnt;
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+ size_t n, xc;
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pc=fli_read_char(f);
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xc=0;
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pos=framebuf+(fli_header->width * yc);
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+ n=(size_t)fli_header->width * (fli_header->height-yc);
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for (pcnt=pc; pcnt>0; pcnt--) {
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unsigned short ps;
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ps=fli_read_char(f);
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if (ps & 0x80) {
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unsigned short len;
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- for (len=-(signed char)ps; len>0; len--) {
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+ for (len=-(signed char)ps; len>0 && xc<n; len--) {
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pos[xc++]=fli_read_char(f);
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}
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} else {
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unsigned char val;
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+ size_t len;
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+ len=MIN(n-xc,ps);
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val=fli_read_char(f);
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- memset(&(pos[xc]), val, ps);
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- xc+=ps;
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+ memset(&(pos[xc]), val, len);
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+ xc+=len;
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}
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}
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}
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@@ -564,25 +570,34 @@ void fli_read_lc(FILE *f, s_fli_header *
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memcpy(framebuf, old_framebuf, fli_header->width * fli_header->height);
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firstline = fli_read_short(f);
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numline = fli_read_short(f);
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+ if (numline > fli_header->height || fli_header->height-numline < firstline)
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+ return;
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+
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for (yc=0; yc < numline; yc++) {
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- unsigned short xc, pc, pcnt;
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+ unsigned short pc, pcnt;
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+ size_t n, xc;
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pc=fli_read_char(f);
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xc=0;
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pos=framebuf+(fli_header->width * (firstline+yc));
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+ n=(size_t)fli_header->width * (fli_header->height-firstline-yc);
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for (pcnt=pc; pcnt>0; pcnt--) {
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unsigned short ps,skip;
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skip=fli_read_char(f);
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ps=fli_read_char(f);
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- xc+=skip;
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+ xc+=MIN(n-xc,skip);
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if (ps & 0x80) {
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unsigned char val;
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+ size_t len;
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ps=-(signed char)ps;
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val=fli_read_char(f);
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- memset(&(pos[xc]), val, ps);
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- xc+=ps;
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+ len=MIN(n-xc,ps);
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+ memset(&(pos[xc]), val, len);
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+ xc+=len;
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} else {
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- fread(&(pos[xc]), ps, 1, f);
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- xc+=ps;
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+ size_t len;
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+ len=MIN(n-xc,ps);
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+ fread(&(pos[xc]), len, 1, f);
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+ xc+=len;
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}
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}
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}
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@@ -689,7 +704,8 @@ void fli_read_lc_2(FILE *f, s_fli_header
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yc=0;
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numline = fli_read_short(f);
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for (lc=0; lc < numline; lc++) {
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- unsigned short xc, pc, pcnt, lpf, lpn;
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+ unsigned short pc, pcnt, lpf, lpn;
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+ size_t n, xc;
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pc=fli_read_short(f);
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lpf=0; lpn=0;
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while (pc & 0x8000) {
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@@ -700,26 +716,30 @@ void fli_read_lc_2(FILE *f, s_fli_header
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}
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pc=fli_read_short(f);
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}
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+ yc=MIN(yc, fli_header->height);
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xc=0;
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pos=framebuf+(fli_header->width * yc);
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+ n=(size_t)fli_header->width * (fli_header->height-yc);
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for (pcnt=pc; pcnt>0; pcnt--) {
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unsigned short ps,skip;
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skip=fli_read_char(f);
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ps=fli_read_char(f);
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- xc+=skip;
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+ xc+=MIN(n-xc,skip);
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if (ps & 0x80) {
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unsigned char v1,v2;
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ps=-(signed char)ps;
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v1=fli_read_char(f);
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v2=fli_read_char(f);
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- while (ps>0) {
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+ while (ps>0 && xc+1<n) {
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pos[xc++]=v1;
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pos[xc++]=v2;
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ps--;
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}
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} else {
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- fread(&(pos[xc]), ps, 2, f);
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- xc+=ps << 1;
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+ size_t len;
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+ len=MIN((n-xc)/2,ps);
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+ fread(&(pos[xc]), len, 2, f);
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+ xc+=len << 1;
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}
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}
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if (lpf) pos[xc]=lpn;
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