38 lines
1.6 KiB
Diff
38 lines
1.6 KiB
Diff
# https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-5951
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# https://bugs.ghostscript.com/show_bug.cgi?id=697548
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commit bfa6b2ecbe48edc69a7d9d22a12419aed25960b8
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Author: Chris Liddell <chris.liddell@artifex.com>
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Date: Thu Apr 6 16:44:54 2017 +0100
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Bug 697548: use the correct param list enumerator
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When we encountered dictionary in a ref_param_list, we were using the enumerator
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for the "parent" param_list, rather than the enumerator for the param_list
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we just created for the dictionary. That parent was usually the stack
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list enumerator, and caused a segfault.
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Using the correct enumerator works better.
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diff --git a/psi/iparam.c b/psi/iparam.c
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index 4e63b6d25..b2fa85fa2 100644
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--- a/psi/iparam.c
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+++ b/psi/iparam.c
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@@ -770,12 +770,13 @@ ref_param_read_typed(gs_param_list * plist, gs_param_name pkey,
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gs_param_enumerator_t enumr;
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gs_param_key_t key;
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ref_type keytype;
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+ dict_param_list *dlist = (dict_param_list *) pvalue->value.d.list;
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param_init_enumerator(&enumr);
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- if (!(*((iparam_list *) plist)->enumerate)
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- ((iparam_list *) pvalue->value.d.list, &enumr, &key, &keytype)
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+ if (!(*(dlist->enumerate))
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+ ((iparam_list *) dlist, &enumr, &key, &keytype)
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&& keytype == t_integer) {
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- ((dict_param_list *) pvalue->value.d.list)->int_keys = 1;
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+ dlist->int_keys = 1;
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pvalue->type = gs_param_type_dict_int_keys;
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}
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}
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