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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

​