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-rw-r--r--source/ap/ghostscript/ghostscript-cve-2019-6116.patch770
1 files changed, 770 insertions, 0 deletions
diff --git a/source/ap/ghostscript/ghostscript-cve-2019-6116.patch b/source/ap/ghostscript/ghostscript-cve-2019-6116.patch
new file mode 100644
index 000000000..1246039ea
--- /dev/null
+++ b/source/ap/ghostscript/ghostscript-cve-2019-6116.patch
@@ -0,0 +1,770 @@
+From 13b0a36f8181db66a91bcc8cea139998b53a8996 Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Wed, 5 Dec 2018 12:22:13 +0000
+Subject: [PATCH 1/4] Sanitize op stack for error conditions
+
+We save the stacks to an array and store the array for the error handler to
+access.
+
+For SAFER, we traverse the array, and deep copy any op arrays (procedures). As
+we make these copies, we check for operators that do *not* exist in systemdict,
+when we find one, we replace the operator with a name object (of the form
+"/--opname--").
+---
+ psi/int.mak | 3 +-
+ psi/interp.c | 8 ++++++
+ psi/istack.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ psi/istack.h | 3 ++
+ 4 files changed, 91 insertions(+), 1 deletion(-)
+
+diff --git a/psi/int.mak b/psi/int.mak
+index 6ab5bf0..6b349cb 100644
+--- a/psi/int.mak
++++ b/psi/int.mak
+@@ -204,7 +204,8 @@ $(PSOBJ)iparam.$(OBJ) : $(PSSRC)iparam.c $(GH)\
+ $(PSOBJ)istack.$(OBJ) : $(PSSRC)istack.c $(GH) $(memory__h)\
+ $(ierrors_h) $(gsstruct_h) $(gsutil_h)\
+ $(ialloc_h) $(istack_h) $(istkparm_h) $(istruct_h) $(iutil_h) $(ivmspace_h)\
+- $(store_h) $(INT_MAK) $(MAKEDIRS)
++ $(store_h) $(icstate_h) $(iname_h) $(dstack_h) $(idict_h) \
++ $(INT_MAK) $(MAKEDIRS)
+ $(PSCC) $(PSO_)istack.$(OBJ) $(C_) $(PSSRC)istack.c
+
+ $(PSOBJ)iutil.$(OBJ) : $(PSSRC)iutil.c $(GH) $(math__h) $(memory__h) $(string__h)\
+diff --git a/psi/interp.c b/psi/interp.c
+index 6dc0dda..aa5779c 100644
+--- a/psi/interp.c
++++ b/psi/interp.c
+@@ -761,6 +761,7 @@ copy_stack(i_ctx_t *i_ctx_p, const ref_stack_t * pstack, int skip, ref * arr)
+ uint size = ref_stack_count(pstack) - skip;
+ uint save_space = ialloc_space(idmemory);
+ int code, i;
++ ref *safety, *safe;
+
+ if (size > 65535)
+ size = 65535;
+@@ -778,6 +779,13 @@ copy_stack(i_ctx_t *i_ctx_p, const ref_stack_t * pstack, int skip, ref * arr)
+ make_null(&arr->value.refs[i]);
+ }
+ }
++ if (pstack == &o_stack && dict_find_string(systemdict, "SAFETY", &safety) > 0 &&
++ dict_find_string(safety, "safe", &safe) > 0 && r_has_type(safe, t_boolean) &&
++ safe->value.boolval == true) {
++ code = ref_stack_array_sanitize(i_ctx_p, arr, arr);
++ if (code < 0)
++ return code;
++ }
+ ialloc_set_space(idmemory, save_space);
+ return code;
+ }
+diff --git a/psi/istack.c b/psi/istack.c
+index 8fe151f..f1a3e51 100644
+--- a/psi/istack.c
++++ b/psi/istack.c
+@@ -27,6 +27,10 @@
+ #include "iutil.h"
+ #include "ivmspace.h" /* for local/global test */
+ #include "store.h"
++#include "icstate.h"
++#include "iname.h"
++#include "dstack.h"
++#include "idict.h"
+
+ /* Forward references */
+ static void init_block(ref_stack_t *pstack, const ref *pblock_array,
+@@ -294,6 +298,80 @@ ref_stack_store_check(const ref_stack_t *pstack, ref *parray, uint count,
+ return 0;
+ }
+
++int
++ref_stack_array_sanitize(i_ctx_t *i_ctx_p, ref *sarr, ref *darr)
++{
++ int i, code;
++ ref obj, arr2;
++ ref *pobj2;
++ gs_memory_t *mem = (gs_memory_t *)idmemory->current;
++
++ if (!r_is_array(sarr) || !r_has_type(darr, t_array))
++ return_error(gs_error_typecheck);
++
++ for (i = 0; i < r_size(sarr); i++) {
++ code = array_get(mem, sarr, i, &obj);
++ if (code < 0)
++ make_null(&obj);
++ switch(r_type(&obj)) {
++ case t_operator:
++ {
++ int index = op_index(&obj);
++
++ if (index > 0 && index < op_def_count) {
++ const byte *data = (const byte *)(op_index_def(index)->oname + 1);
++ if (dict_find_string(systemdict, (const char *)data, &pobj2) <= 0) {
++ byte *s = gs_alloc_bytes(mem, strlen((char *)data) + 5, "ref_stack_array_sanitize");
++ if (s) {
++ s[0] = '\0';
++ strcpy((char *)s, "--");
++ strcpy((char *)s + 2, (char *)data);
++ strcpy((char *)s + strlen((char *)data) + 2, "--");
++ }
++ else {
++ s = (byte *)data;
++ }
++ code = name_ref(imemory, s, strlen((char *)s), &obj, 1);
++ if (code < 0) make_null(&obj);
++ if (s != data)
++ gs_free_object(mem, s, "ref_stack_array_sanitize");
++ }
++ }
++ else {
++ make_null(&obj);
++ }
++ ref_assign(darr->value.refs + i, &obj);
++ break;
++ }
++ case t_array:
++ case t_shortarray:
++ case t_mixedarray:
++ {
++ int attrs = r_type_attrs(&obj) & (a_write | a_read | a_execute | a_executable);
++ /* We only want to copy executable arrays */
++ if (attrs & (a_execute | a_executable)) {
++ code = ialloc_ref_array(&arr2, attrs, r_size(&obj), "ref_stack_array_sanitize");
++ if (code < 0) {
++ make_null(&arr2);
++ }
++ else {
++ code = ref_stack_array_sanitize(i_ctx_p, &obj, &arr2);
++ }
++ ref_assign(darr->value.refs + i, &arr2);
++ }
++ else {
++ ref_assign(darr->value.refs + i, &obj);
++ }
++ break;
++ }
++ default:
++ ref_assign(darr->value.refs + i, &obj);
++ }
++ }
++ return 0;
++}
++
++
+ /*
+ * Store the top 'count' elements of a stack, starting 'skip' elements below
+ * the top, into an array, with or without store/undo checking. age=-1 for
+diff --git a/psi/istack.h b/psi/istack.h
+index 051dcbe..54be405 100644
+--- a/psi/istack.h
++++ b/psi/istack.h
+@@ -129,6 +129,9 @@ int ref_stack_store(const ref_stack_t *pstack, ref *parray, uint count,
+ uint skip, int age, bool check,
+ gs_dual_memory_t *idmem, client_name_t cname);
+
++int
++ref_stack_array_sanitize(i_ctx_t *i_ctx_p, ref *sarr, ref *darr);
++
+ /*
+ * Pop the top N elements off a stack.
+ * The number must not exceed the number of elements in use.
+--
+2.20.1
+
+
+From 2db98f9c66135601efb103d8db7d020a672308db Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Thu, 13 Dec 2018 15:28:34 +0000
+Subject: [PATCH 2/4] Any transient procedures that call .force* operators
+
+(i.e. for conditionals or loops) make them executeonly.
+---
+ Resource/Init/gs_diskn.ps | 2 +-
+ Resource/Init/gs_dps1.ps | 4 ++--
+ Resource/Init/gs_fntem.ps | 4 ++--
+ Resource/Init/gs_fonts.ps | 12 ++++++------
+ Resource/Init/gs_init.ps | 4 ++--
+ Resource/Init/gs_lev2.ps | 11 ++++++-----
+ Resource/Init/gs_pdfwr.ps | 2 +-
+ Resource/Init/gs_res.ps | 4 ++--
+ Resource/Init/gs_setpd.ps | 2 +-
+ Resource/Init/pdf_base.ps | 13 ++++++++-----
+ Resource/Init/pdf_draw.ps | 16 +++++++++-------
+ Resource/Init/pdf_font.ps | 6 +++---
+ Resource/Init/pdf_main.ps | 4 ++--
+ Resource/Init/pdf_ops.ps | 7 ++++---
+ 14 files changed, 49 insertions(+), 42 deletions(-)
+
+diff --git a/Resource/Init/gs_diskn.ps b/Resource/Init/gs_diskn.ps
+index fd694bc..8bf2054 100644
+--- a/Resource/Init/gs_diskn.ps
++++ b/Resource/Init/gs_diskn.ps
+@@ -51,7 +51,7 @@ systemdict begin
+ mark 5 1 roll ] mark exch { { } forall } forall ]
+ //systemdict /.searchabledevs 2 index .forceput
+ exch .setglobal
+- }
++ } executeonly
+ if
+ } .bind executeonly odef % must be bound and hidden for .forceput
+
+diff --git a/Resource/Init/gs_dps1.ps b/Resource/Init/gs_dps1.ps
+index ec5db61..4fae283 100644
+--- a/Resource/Init/gs_dps1.ps
++++ b/Resource/Init/gs_dps1.ps
+@@ -78,7 +78,7 @@ level2dict begin
+ .currentglobal
+ { % Current mode is global; delete from local directory too.
+ //systemdict /LocalFontDirectory .knownget
+- { 1 index .forceundef } % LocalFontDirectory is readonly
++ { 1 index .forceundef } executeonly % LocalFontDirectory is readonly
+ if
+ }
+ { % Current mode is local; if there was a shadowed global
+@@ -126,7 +126,7 @@ level2dict begin
+ }
+ ifelse
+ } forall
+- pop counttomark 2 idiv { .forceundef } repeat pop % readonly
++ pop counttomark 2 idiv { .forceundef } executeonly repeat pop % readonly
+ }
+ if
+ //SharedFontDirectory exch .forcecopynew pop
+diff --git a/Resource/Init/gs_fntem.ps b/Resource/Init/gs_fntem.ps
+index c1f7651..6eb672a 100644
+--- a/Resource/Init/gs_fntem.ps
++++ b/Resource/Init/gs_fntem.ps
+@@ -401,12 +401,12 @@ currentdict end def
+ .forceput % FontInfo can be read-only.
+ pop % bool <font>
+ exit
+- } if
++ } executeonly if
+ dup /FontInfo get % bool <font> <FI>
+ /GlyphNames2Unicode /Unicode /Decoding findresource
+ .forceput % FontInfo can be read-only.
+ exit
+- } loop
++ } executeonly loop
+ exch setglobal
+ } .bind executeonly odef % must be bound and hidden for .forceput
+
+diff --git a/Resource/Init/gs_fonts.ps b/Resource/Init/gs_fonts.ps
+index 803faca..290da0c 100644
+--- a/Resource/Init/gs_fonts.ps
++++ b/Resource/Init/gs_fonts.ps
+@@ -374,7 +374,7 @@ FONTPATH length 0 eq { (%END FONTPATH) .skipeof } if
+ /.setnativefontmapbuilt { % set whether we've been run
+ dup type /booleantype eq {
+ systemdict exch /.nativefontmapbuilt exch .forceput
+- }
++ } executeonly
+ {pop}
+ ifelse
+ } .bind executeonly odef
+@@ -1007,11 +1007,11 @@ $error /SubstituteFont { } put
+ { 2 index gcheck currentglobal
+ 2 copy eq {
+ pop pop .forceput
+- } {
++ } executeonly {
+ 5 1 roll setglobal
+ dup length string copy
+ .forceput setglobal
+- } ifelse
++ } executeonly ifelse
+ } .bind executeonly odef % must be bound and hidden for .forceput
+
+ % Attempt to load a font from a file.
+@@ -1084,7 +1084,7 @@ $error /SubstituteFont { } put
+ .FontDirectory 3 index .forceundef % readonly
+ 1 index (r) file .loadfont .FontDirectory exch
+ /.setglobal .systemvar exec
+- }
++ } executeonly
+ { .loadfont .FontDirectory
+ }
+ ifelse
+@@ -1105,7 +1105,7 @@ $error /SubstituteFont { } put
+ dup 3 index .fontknownget
+ { dup /PathLoad 4 index .putgstringcopy
+ 4 1 roll pop pop pop //true exit
+- } if
++ } executeonly if
+
+ % Maybe the file had a different FontName.
+ % See if we can get a FontName from the file, and if so,
+@@ -1134,7 +1134,7 @@ $error /SubstituteFont { } put
+ ifelse % Stack: origfontname fontdict
+ exch pop //true exit
+ % Stack: fontdict
+- }
++ } executeonly
+ if pop % Stack: origfontname fontdirectory path
+ }
+ if pop pop % Stack: origfontname
+diff --git a/Resource/Init/gs_init.ps b/Resource/Init/gs_init.ps
+index d733124..56c0bd2 100644
+--- a/Resource/Init/gs_init.ps
++++ b/Resource/Init/gs_init.ps
+@@ -2357,7 +2357,7 @@ SAFER { .setsafeglobal } if
+ % Update the copy of the user parameters.
+ mark .currentuserparams counttomark 2 idiv {
+ userparams 3 1 roll .forceput % userparams is read-only
+- } repeat pop
++ } executeonly repeat pop
+ % Turn on idiom recognition, if available.
+ currentuserparams /IdiomRecognition known {
+ /IdiomRecognition //true .definepsuserparam
+@@ -2376,7 +2376,7 @@ SAFER { .setsafeglobal } if
+ % Remove real system params from pssystemparams.
+ mark .currentsystemparams counttomark 2 idiv {
+ pop pssystemparams exch .forceundef
+- } repeat pop
++ } executeonly repeat pop
+ } if
+
+ % Set up AlignToPixels :
+diff --git a/Resource/Init/gs_lev2.ps b/Resource/Init/gs_lev2.ps
+index 44fe619..0f0d573 100644
+--- a/Resource/Init/gs_lev2.ps
++++ b/Resource/Init/gs_lev2.ps
+@@ -154,7 +154,8 @@ end
+ % protect top level of parameters that we copied
+ dup type dup /arraytype eq exch /stringtype eq or { readonly } if
+ /userparams .systemvar 3 1 roll .forceput % userparams is read-only
+- } {
++ } executeonly
++ {
+ pop pop
+ } ifelse
+ } forall
+@@ -224,7 +225,7 @@ end
+ % protect top level parameters that we copied
+ dup type dup /arraytype eq exch /stringtype eq or { readonly } if
+ //pssystemparams 3 1 roll .forceput % pssystemparams is read-only
+- }
++ } executeonly
+ { pop pop
+ }
+ ifelse
+@@ -934,7 +935,7 @@ mark
+ dup /PaintProc get
+ 1 index /Implementation known not {
+ 1 index dup /Implementation //null .forceput readonly pop
+- } if
++ } executeonly if
+ exec
+ }.bind odef
+
+@@ -958,7 +959,7 @@ mark
+ dup /PaintProc get
+ 1 index /Implementation known not {
+ 1 index dup /Implementation //null .forceput readonly pop
+- } if
++ } executeonly if
+ /UNROLLFORMS where {/UNROLLFORMS get}{false}ifelse not
+ %% [CTM] <<Form>> PaintProc .beginform -
+ {
+@@ -1005,7 +1006,7 @@ mark
+ %% Form dictioanry using the /Implementation key).
+ 1 dict dup /FormID 4 -1 roll put
+ 1 index exch /Implementation exch .forceput readonly pop
+- }
++ } executeonly
+ ifelse
+ }
+ {
+diff --git a/Resource/Init/gs_pdfwr.ps b/Resource/Init/gs_pdfwr.ps
+index 58e75d3..b425103 100644
+--- a/Resource/Init/gs_pdfwr.ps
++++ b/Resource/Init/gs_pdfwr.ps
+@@ -650,7 +650,7 @@ currentdict /.pdfmarkparams .undef
+ } ifelse
+ } bind .makeoperator .forceput
+ systemdict /.pdf_hooked_DSC_Creator //true .forceput
+- } if
++ } executeonly if
+ pop
+ } if
+ } {
+diff --git a/Resource/Init/gs_res.ps b/Resource/Init/gs_res.ps
+index 8eb8bb0..d9b3459 100644
+--- a/Resource/Init/gs_res.ps
++++ b/Resource/Init/gs_res.ps
+@@ -152,7 +152,7 @@ setglobal
+ % use .forceput / .forcedef later to replace the dummy,
+ % empty .Instances dictionary with the real one later.
+ readonly
+- } {
++ }{
+ /defineresource cvx /typecheck signaloperror
+ } ifelse
+ } bind executeonly odef
+@@ -424,7 +424,7 @@ status {
+ % As noted above, Category dictionaries are read-only,
+ % so we have to use .forcedef here.
+ /.Instances 1 index .forcedef % Category dict is read-only
+- } if
++ } executeonly if
+ }
+ { .LocalInstances dup //.emptydict eq
+ { pop 3 dict localinstancedict Category 2 index put
+diff --git a/Resource/Init/gs_setpd.ps b/Resource/Init/gs_setpd.ps
+index e22597e..7875d1f 100644
+--- a/Resource/Init/gs_setpd.ps
++++ b/Resource/Init/gs_setpd.ps
+@@ -634,7 +634,7 @@ NOMEDIAATTRS {
+ SETPDDEBUG { (Rolling back.) = pstack flush } if
+ 3 index 2 index 3 -1 roll .forceput
+ 4 index 1 index .knownget
+- { 4 index 3 1 roll .forceput }
++ { 4 index 3 1 roll .forceput } executeonly
+ { 3 index exch .undef }
+ ifelse
+ } bind executeonly odef
+diff --git a/Resource/Init/pdf_base.ps b/Resource/Init/pdf_base.ps
+index b45e980..7312729 100644
+--- a/Resource/Init/pdf_base.ps
++++ b/Resource/Init/pdf_base.ps
+@@ -130,26 +130,29 @@ currentdict /num-chars-dict .undef
+
+ /.pdfexectoken { % <count> <opdict> <exectoken> .pdfexectoken ?
+ PDFDEBUG {
+- pdfdict /PDFSTEPcount known not { pdfdict /PDFSTEPcount 1 .forceput } if
++ pdfdict /PDFSTEPcount known not { pdfdict /PDFSTEPcount 1 .forceput } executeonly if
+ PDFSTEP {
+ pdfdict /PDFtokencount 2 copy .knownget { 1 add } { 1 } ifelse .forceput
+ PDFSTEPcount 1 gt {
+ pdfdict /PDFSTEPcount PDFSTEPcount 1 sub .forceput
+- } {
++ } executeonly
++ {
+ dup ==only
+ ( step # ) print PDFtokencount =only
+ ( ? ) print flush 1 //false .outputpage
+ (%stdin) (r) file 255 string readline {
+ token {
+ exch pop pdfdict /PDFSTEPcount 3 -1 roll .forceput
+- } {
++ } executeonly
++ {
+ pdfdict /PDFSTEPcount 1 .forceput
+- } ifelse % token
++ } executeonly ifelse % token
+ } {
+ pop /PDFSTEP //false def % EOF on stdin
+ } ifelse % readline
+ } ifelse % PDFSTEPcount > 1
+- } {
++ } executeonly
++ {
+ dup ==only () = flush
+ } ifelse % PDFSTEP
+ } if % PDFDEBUG
+diff --git a/Resource/Init/pdf_draw.ps b/Resource/Init/pdf_draw.ps
+index 6b0ba93..40c6ac8 100644
+--- a/Resource/Init/pdf_draw.ps
++++ b/Resource/Init/pdf_draw.ps
+@@ -1118,14 +1118,14 @@ currentdict end readonly def
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ }
+ {
+ currentglobal pdfdict gcheck .setglobal
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ end
+ } ifelse
+ } loop
+@@ -1141,14 +1141,14 @@ currentdict end readonly def
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ }
+ {
+ currentglobal pdfdict gcheck .setglobal
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ } if
+ pop
+
+@@ -2350,9 +2350,10 @@ currentdict /last-ditch-bpc-csp undef
+ /IncrementAppearanceNumber {
+ pdfdict /AppearanceNumber .knownget {
+ 1 add pdfdict /AppearanceNumber 3 -1 roll .forceput
+- }{
++ } executeonly
++ {
+ pdfdict /AppearanceNumber 0 .forceput
+- } ifelse
++ } executeonly ifelse
+ }bind executeonly odef
+
+ /MakeAppearanceName {
+@@ -2510,7 +2511,8 @@ currentdict /last-ditch-bpc-csp undef
+ %% want to preserve it.
+ pdfdict /.PreservePDFForm false .forceput
+ /q cvx /execform cvx 5 -2 roll
+- }{
++ } executeonly
++ {
+ /q cvx /PDFexecform cvx 5 -2 roll
+ } ifelse
+
+diff --git a/Resource/Init/pdf_font.ps b/Resource/Init/pdf_font.ps
+index bea9ea9..4cd62b9 100644
+--- a/Resource/Init/pdf_font.ps
++++ b/Resource/Init/pdf_font.ps
+@@ -714,7 +714,7 @@ currentdict end readonly def
+ pop pop pop
+ currentdict /.stackdepth .forceundef
+ currentdict /.dstackdepth .forceundef
+- }
++ } executeonly
+ {pop pop pop}
+ ifelse
+
+@@ -1232,7 +1232,7 @@ currentdict /eexec_pdf_param_dict .undef
+ (\n **** Warning: Type 3 glyph has unbalanced q/Q operators \(too many q's\)\n Output may be incorrect.\n)
+ pdfformatwarning
+ pdfdict /.Qqwarning_issued //true .forceput
+- } if
++ } executeonly if
+ Q
+ } repeat
+ Q
+@@ -2016,7 +2016,7 @@ currentdict /CMap_read_dict undef
+ /CIDFallBack /CIDFont findresource
+ } if
+ exit
+- } if
++ } executeonly if
+ } if
+ } if
+
+diff --git a/Resource/Init/pdf_main.ps b/Resource/Init/pdf_main.ps
+index 00da47a..37e69b3 100644
+--- a/Resource/Init/pdf_main.ps
++++ b/Resource/Init/pdf_main.ps
+@@ -2701,14 +2701,14 @@ currentdict /PDF2PS_matrix_key undef
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ }
+ {
+ currentglobal pdfdict gcheck .setglobal
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ } if
+ } if
+ pop
+diff --git a/Resource/Init/pdf_ops.ps b/Resource/Init/pdf_ops.ps
+index 8672d61..aa09641 100644
+--- a/Resource/Init/pdf_ops.ps
++++ b/Resource/Init/pdf_ops.ps
+@@ -184,14 +184,14 @@ currentdict /gput_always_allow .undef
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ }
+ {
+ currentglobal pdfdict gcheck .setglobal
+ pdfdict /.Qqwarning_issued //true .forceput
+ .setglobal
+ pdfformaterror
+- } ifelse
++ } executeonly ifelse
+ } if
+ } bind executeonly odef
+
+@@ -439,7 +439,8 @@ currentdict /gput_always_allow .undef
+ dup type /booleantype eq {
+ .currentSMask type /dicttype eq {
+ .currentSMask /Processed 2 index .forceput
+- } {
++ } executeonly
++ {
+ .setSMask
+ }ifelse
+ }{
+--
+2.20.1
+
+
+From 99f13091a3f309bdc95d275ea9fec10bb9f42d9a Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Sat, 15 Dec 2018 09:08:32 +0000
+Subject: [PATCH 3/4] Bug700317: Fix logic for an older change
+
+Unlike almost every other function in gs, dict_find_string() returns 1 on
+success 0 or <0 on failure. The logic for this case was wrong.
+---
+ psi/interp.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/psi/interp.c b/psi/interp.c
+index aa5779c..f6c45bb 100644
+--- a/psi/interp.c
++++ b/psi/interp.c
+@@ -703,7 +703,7 @@ again:
+ * i.e. it's an internal operator we have hidden
+ */
+ code = dict_find_string(systemdict, (const char *)bufptr, &tobj);
+- if (code < 0) {
++ if (code <= 0) {
+ buf[0] = buf[1] = buf[rlen + 2] = buf[rlen + 3] = '-';
+ rlen += 4;
+ bufptr = buf;
+--
+2.20.1
+
+
+From 59d8f4deef90c1598ff50616519d5576756b4495 Mon Sep 17 00:00:00 2001
+From: Chris Liddell <chris.liddell@artifex.com>
+Date: Tue, 18 Dec 2018 10:42:10 +0000
+Subject: [PATCH 4/4] Harden some uses of .force* operators
+
+by adding a few immediate evalutions
+---
+ Resource/Init/gs_dps1.ps | 4 ++--
+ Resource/Init/gs_fonts.ps | 20 ++++++++++----------
+ Resource/Init/gs_init.ps | 6 +++---
+ 3 files changed, 15 insertions(+), 15 deletions(-)
+
+diff --git a/Resource/Init/gs_dps1.ps b/Resource/Init/gs_dps1.ps
+index 4fae283..b75ea14 100644
+--- a/Resource/Init/gs_dps1.ps
++++ b/Resource/Init/gs_dps1.ps
+@@ -74,7 +74,7 @@ level2dict begin
+ } odef
+ % undefinefont has to take local/global VM into account.
+ /undefinefont % <fontname> undefinefont -
+- { .FontDirectory 1 .argindex .forceundef % FontDirectory is readonly
++ { //.FontDirectory 1 .argindex .forceundef % FontDirectory is readonly
+ .currentglobal
+ { % Current mode is global; delete from local directory too.
+ //systemdict /LocalFontDirectory .knownget
+@@ -85,7 +85,7 @@ level2dict begin
+ % definition, copy it into the local directory.
+ //systemdict /SharedFontDirectory .knownget
+ { 1 index .knownget
+- { .FontDirectory 2 index 3 -1 roll { put } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse } % readonly
++ { //.FontDirectory 2 index 3 -1 roll { put } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse } % readonly
+ if
+ }
+ if
+diff --git a/Resource/Init/gs_fonts.ps b/Resource/Init/gs_fonts.ps
+index 290da0c..c13a2fc 100644
+--- a/Resource/Init/gs_fonts.ps
++++ b/Resource/Init/gs_fonts.ps
+@@ -516,7 +516,7 @@ buildfontdict 3 /.buildfont3 cvx put
+ if
+ }
+ if
+- dup .FontDirectory 4 -2 roll { .growput } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse % readonly
++ dup //.FontDirectory 4 -2 roll { .growput } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse % readonly
+ % If the font originated as a resource, register it.
+ currentfile .currentresourcefile eq { dup .registerfont } if
+ readonly
+@@ -943,7 +943,7 @@ $error /SubstituteFont { } put
+ % Try to find a font using only the present contents of Fontmap.
+ /.tryfindfont { % <fontname> .tryfindfont <font> true
+ % <fontname> .tryfindfont false
+- .FontDirectory 1 index .fontknownget
++ //.FontDirectory 1 index .fontknownget
+ { % Already loaded
+ exch pop //true
+ }
+@@ -975,7 +975,7 @@ $error /SubstituteFont { } put
+ { % Font with a procedural definition
+ exec % The procedure will load the font.
+ % Check to make sure this really happened.
+- .FontDirectory 1 index .knownget
++ //.FontDirectory 1 index .knownget
+ { exch pop //true exit }
+ if
+ }
+@@ -1081,11 +1081,11 @@ $error /SubstituteFont { } put
+ % because it's different depending on language level.
+ .currentglobal exch /.setglobal .systemvar exec
+ % Remove the fake definition, if any.
+- .FontDirectory 3 index .forceundef % readonly
+- 1 index (r) file .loadfont .FontDirectory exch
++ //.FontDirectory 3 index .forceundef % readonly
++ 1 index (r) file .loadfont //.FontDirectory exch
+ /.setglobal .systemvar exec
+ } executeonly
+- { .loadfont .FontDirectory
++ { .loadfont //.FontDirectory
+ }
+ ifelse
+ % Stack: fontname fontfilename fontdirectory
+@@ -1119,8 +1119,8 @@ $error /SubstituteFont { } put
+ % Stack: origfontname fontdirectory filefontname fontdict
+ 3 -1 roll pop
+ % Stack: origfontname filefontname fontdict
+- dup /FontName get dup FontDirectory exch .forceundef
+- GlobalFontDirectory exch .forceundef
++ dup /FontName get dup //.FontDirectory exch .forceundef
++ /GlobalFontDirectory .systemvar exch .forceundef
+ dup length dict .copydict dup 3 index /FontName exch put
+ 2 index exch definefont
+ exch
+@@ -1176,10 +1176,10 @@ currentdict /.putgstringcopy .undef
+ {
+ {
+ pop dup type /stringtype eq { cvn } if
+- .FontDirectory 1 index known not {
++ //.FontDirectory 1 index known not {
+ 2 dict dup /FontName 3 index put
+ dup /FontType 1 put
+- .FontDirectory 3 1 roll { put } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse % readonly
++ //.FontDirectory 3 1 roll { put } systemdict /superexec known {//superexec}{1183615869 internaldict /superexec get exec} ifelse % readonly
+ } {
+ pop
+ } ifelse
+diff --git a/Resource/Init/gs_init.ps b/Resource/Init/gs_init.ps
+index 56c0bd2..d9a0829 100644
+--- a/Resource/Init/gs_init.ps
++++ b/Resource/Init/gs_init.ps
+@@ -1168,8 +1168,8 @@ errordict /unknownerror .undef
+ }ifelse
+ }forall
+ noaccess pop
+- systemdict /.setsafeerrors .forceundef
+- systemdict /.SAFERERRORLIST .forceundef
++ //systemdict /.setsafeerrors .forceundef
++ //systemdict /.SAFERERRORLIST .forceundef
+ } bind executeonly odef
+
+ SAFERERRORS {.setsafererrors} if
+@@ -2114,7 +2114,7 @@ currentdict /tempfilepaths undef
+
+ /.locksafe {
+ .locksafe_userparams
+- systemdict /getenv {pop //false} .forceput
++ //systemdict /getenv {pop //false} .forceput
+ % setpagedevice has the side effect of clearing the page, but
+ % we will just document that. Using setpagedevice keeps the device
+ % properties and pagedevice .LockSafetyParams in agreement even
+--
+2.20.1
+
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