40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
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From: Chris Liddell <chris.liddell@artifex.com>
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Date: Sat, 8 Oct 2016 15:10:27 +0000 (+0100)
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Subject: Bug 697203: check for sufficient params in .sethalftone5
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X-Git-Url: http://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff_plain;h=f5c7555c30393e64ec1f5ab0dfae5b55b3b3fc78;hp=a5360401495654e89301b2516703c1d2877fc5ba
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Bug 697203: check for sufficient params in .sethalftone5
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and param types
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---
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diff --git a/psi/zht2.c b/psi/zht2.c
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index fb4a264..dfa27a4 100644
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--- a/psi/zht2.c
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+++ b/psi/zht2.c
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@@ -82,14 +82,22 @@ zsethalftone5(i_ctx_t *i_ctx_p)
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gs_memory_t *mem;
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uint edepth = ref_stack_count(&e_stack);
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int npop = 2;
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- int dict_enum = dict_first(op);
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+ int dict_enum;
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ref rvalue[2];
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int cname, colorant_number;
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byte * pname;
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uint name_size;
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int halftonetype, type = 0;
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gs_gstate *pgs = igs;
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- int space_index = r_space_index(op - 1);
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+ int space_index;
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+
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+ if (ref_stack_count(&o_stack) < 2)
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+ return_error(gs_error_stackunderflow);
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+ check_type(*op, t_dictionary);
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+ check_type(*(op - 1), t_dictionary);
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+
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+ dict_enum = dict_first(op);
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+ space_index = r_space_index(op - 1);
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mem = (gs_memory_t *) idmemory->spaces_indexed[space_index];
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