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ghostscript/SOURCES/ghostscript-cve-2020-16307.patch
CentOS Sources 57818b4e3d import ghostscript-9.27-1.el8
2021-10-08 11:20:26 +00:00

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diff --git a/devices/vector/gdevtxtw.c b/devices/vector/gdevtxtw.c
index b958027..7f02608 100644
--- a/devices/vector/gdevtxtw.c
+++ b/devices/vector/gdevtxtw.c
@@ -1693,97 +1693,100 @@ static int get_unicode(textw_text_enum_t *penum, gs_font *font, gs_glyph glyph,
length = font->procs.decode_glyph((gs_font *)font, glyph, ch, NULL, 0);
if (length == 0) {
- code = font->procs.glyph_name(font, glyph, &gnstr);
- if (code >= 0 && gnstr.size == 7) {
- if (!memcmp(gnstr.data, "uni", 3)) {
- static const char *hexdigits = "0123456789ABCDEF";
- char *d0 = strchr(hexdigits, gnstr.data[3]);
- char *d1 = strchr(hexdigits, gnstr.data[4]);
- char *d2 = strchr(hexdigits, gnstr.data[5]);
- char *d3 = strchr(hexdigits, gnstr.data[6]);
-
- if (d0 != NULL && d1 != NULL && d2 != NULL && d3 != NULL) {
- *Buffer++ = ((d0 - hexdigits) << 12) + ((d1 - hexdigits) << 8) + ((d2 - hexdigits) << 4) + (d3 - hexdigits);
- return 1;
- }
- }
- }
- if (length == 0) {
- single_glyph_list_t *sentry = (single_glyph_list_t *)&SingleGlyphList;
- double_glyph_list_t *dentry = (double_glyph_list_t *)&DoubleGlyphList;
- treble_glyph_list_t *tentry = (treble_glyph_list_t *)&TrebleGlyphList;
- quad_glyph_list_t *qentry = (quad_glyph_list_t *)&QuadGlyphList;
-
- /* Search glyph to single Unicode value table */
- while (sentry->Glyph != 0) {
- if (sentry->Glyph[0] < gnstr.data[0]) {
- sentry++;
- continue;
- }
- if (sentry->Glyph[0] > gnstr.data[0]){
- break;
- }
- if (strlen(sentry->Glyph) == gnstr.size) {
- if(memcmp(gnstr.data, sentry->Glyph, gnstr.size) == 0) {
- *Buffer = sentry->Unicode;
+ if (glyph != GS_NO_GLYPH) {
+ code = font->procs.glyph_name(font, glyph, &gnstr);
+ if (code >= 0 && gnstr.size == 7) {
+ if (!memcmp(gnstr.data, "uni", 3)) {
+ static const char *hexdigits = "0123456789ABCDEF";
+ char *d0 = strchr(hexdigits, gnstr.data[3]);
+ char *d1 = strchr(hexdigits, gnstr.data[4]);
+ char *d2 = strchr(hexdigits, gnstr.data[5]);
+ char *d3 = strchr(hexdigits, gnstr.data[6]);
+
+ if (d0 != NULL && d1 != NULL && d2 != NULL && d3 != NULL) {
+ *Buffer++ = ((d0 - hexdigits) << 12) + ((d1 - hexdigits) << 8) + ((d2 - hexdigits) << 4) + (d3 - hexdigits);
return 1;
}
}
- sentry++;
}
- /* Search glyph to double Unicode value table */
- while (dentry->Glyph != 0) {
- if (dentry->Glyph[0] < gnstr.data[0]) {
- dentry++;
- continue;
- }
- if (dentry->Glyph[0] > gnstr.data[0]){
- break;
- }
- if (strlen(dentry->Glyph) == gnstr.size) {
- if(memcmp(gnstr.data, dentry->Glyph, gnstr.size) == 0) {
- memcpy(Buffer, dentry->Unicode, 2);
- return 2;
+ if (length == 0) {
+ single_glyph_list_t *sentry = (single_glyph_list_t *)&SingleGlyphList;
+ double_glyph_list_t *dentry = (double_glyph_list_t *)&DoubleGlyphList;
+ treble_glyph_list_t *tentry = (treble_glyph_list_t *)&TrebleGlyphList;
+ quad_glyph_list_t *qentry = (quad_glyph_list_t *)&QuadGlyphList;
+
+ /* Search glyph to single Unicode value table */
+ while (sentry->Glyph != 0) {
+ if (sentry->Glyph[0] < gnstr.data[0]) {
+ sentry++;
+ continue;
+ }
+ if (sentry->Glyph[0] > gnstr.data[0]){
+ break;
+ }
+ if (strlen(sentry->Glyph) == gnstr.size) {
+ if(memcmp(gnstr.data, sentry->Glyph, gnstr.size) == 0) {
+ *Buffer = sentry->Unicode;
+ return 1;
+ }
}
+ sentry++;
}
- dentry++;
- }
- /* Search glyph to triple Unicode value table */
- while (tentry->Glyph != 0) {
- if (tentry->Glyph[0] < gnstr.data[0]) {
- tentry++;
- continue;
- }
- if (tentry->Glyph[0] > gnstr.data[0]){
- break;
- }
- if (strlen(tentry->Glyph) == gnstr.size) {
- if(memcmp(gnstr.data, tentry->Glyph, gnstr.size) == 0) {
- memcpy(Buffer, tentry->Unicode, 3);
- return 3;
+ /* Search glyph to double Unicode value table */
+ while (dentry->Glyph != 0) {
+ if (dentry->Glyph[0] < gnstr.data[0]) {
+ dentry++;
+ continue;
}
+ if (dentry->Glyph[0] > gnstr.data[0]){
+ break;
+ }
+ if (strlen(dentry->Glyph) == gnstr.size) {
+ if(memcmp(gnstr.data, dentry->Glyph, gnstr.size) == 0) {
+ memcpy(Buffer, dentry->Unicode, 2);
+ return 2;
+ }
+ }
+ dentry++;
}
- tentry++;
- }
- /* Search glyph to quadruple Unicode value table */
- while (qentry->Glyph != 0) {
- if (qentry->Glyph[0] < gnstr.data[0]) {
- qentry++;
- continue;
- }
- if (qentry->Glyph[0] > gnstr.data[0]){
- break;
+ /* Search glyph to triple Unicode value table */
+ while (tentry->Glyph != 0) {
+ if (tentry->Glyph[0] < gnstr.data[0]) {
+ tentry++;
+ continue;
+ }
+ if (tentry->Glyph[0] > gnstr.data[0]){
+ break;
+ }
+ if (strlen(tentry->Glyph) == gnstr.size) {
+ if(memcmp(gnstr.data, tentry->Glyph, gnstr.size) == 0) {
+ memcpy(Buffer, tentry->Unicode, 3);
+ return 3;
+ }
+ }
+ tentry++;
}
- if (strlen(qentry->Glyph) == gnstr.size) {
- if(memcmp(gnstr.data, qentry->Glyph, gnstr.size) == 0) {
- memcpy(Buffer, qentry->Unicode, 4);
- return 4;
+
+ /* Search glyph to quadruple Unicode value table */
+ while (qentry->Glyph != 0) {
+ if (qentry->Glyph[0] < gnstr.data[0]) {
+ qentry++;
+ continue;
+ }
+ if (qentry->Glyph[0] > gnstr.data[0]){
+ break;
}
+ if (strlen(qentry->Glyph) == gnstr.size) {
+ if(memcmp(gnstr.data, qentry->Glyph, gnstr.size) == 0) {
+ memcpy(Buffer, qentry->Unicode, 4);
+ return 4;
+ }
+ }
+ qentry++;
}
- qentry++;
}
}
*Buffer = fallback;
@@ -1890,8 +1893,8 @@ txtwrite_process_cmap_text(gs_text_enum_t *pte)
pte->returned.total_width.x += dpt.x;
pte->returned.total_width.y += dpt.y;
- penum->TextBufferIndex += get_unicode(penum, (gs_font *)pte->orig_font, glyph, chr, &penum->TextBuffer[penum->TextBufferIndex]);
penum->Widths[penum->TextBufferIndex] += dpt.x;
+ penum->TextBufferIndex += get_unicode(penum, (gs_font *)pte->orig_font, glyph, chr, &penum->TextBuffer[penum->TextBufferIndex]);
break;
case 2: /* end of string */
return 0;
diff --git a/psi/zbfont.c b/psi/zbfont.c
index 262fea9..abc03aa 100644
--- a/psi/zbfont.c
+++ b/psi/zbfont.c
@@ -272,7 +272,7 @@ gs_font_map_glyph_to_unicode(gs_font *font, gs_glyph glyph, int ch, ushort *u, u
* can't be a default value for FontInfo.GlyphNames2Unicode .
*/
}
- if (glyph <= GS_MIN_CID_GLYPH) {
+ if (glyph <= GS_MIN_CID_GLYPH && glyph != GS_NO_GLYPH) {
UnicodeDecoding = zfont_get_to_unicode_map(font->dir);
if (UnicodeDecoding != NULL && r_type(UnicodeDecoding) == t_dictionary)
return gs_font_map_glyph_by_dict(font->memory, UnicodeDecoding, glyph, u, length);
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