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From 4f83478c88c2e05d6e8d79ca4557eb039354d2f3 Mon Sep 17 00:00:00 2001
From: Chris Liddell <chris.liddell@artifex.com>
Date: Thu, 27 Apr 2017 13:03:33 +0100
Subject: [PATCH] Bug 697799: have .eqproc check its parameters
The Ghostscript custom operator .eqproc was not check the number or type of
the parameters it was given.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
psi/zmisc3.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/psi/zmisc3.c b/psi/zmisc3.c
index 54b304246..37293ff4b 100644
--- a/psi/zmisc3.c
+++ b/psi/zmisc3.c
@@ -56,6 +56,12 @@ zeqproc(i_ctx_t *i_ctx_p)
ref2_t stack[MAX_DEPTH + 1];
ref2_t *top = stack;
+ if (ref_stack_count(&o_stack) < 2)
+ return_error(gs_error_stackunderflow);
+ if (!r_is_array(op - 1) || !r_is_array(op)) {
+ return_error(gs_error_typecheck);
+ }
+
make_array(&stack[0].proc1, 0, 1, op - 1);
make_array(&stack[0].proc2, 0, 1, op);
for (;;) {
--
2.11.0
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