From e62f41f06c88bfdb4f46a418730095753c298b39 Mon Sep 17 00:00:00 2001
From: Pompolic <pompolic@special-circumstanc.es>
Date: Fri, 18 Feb 2022 16:15:58 +0100
Subject: [PATCH] Fix SIGSEGV in parse_xobject
Try to ignore text stream of a Form XObject if it fails to parse
---
pdf.c | 29 +++++++++++++++++++----------
1 file changed, 19 insertions(+), 10 deletions(-)
diff --git a/pdf.c b/pdf.c
index f2121fc..6bcd7e4 100644
--- a/pdf.c
+++ b/pdf.c
@@ -4444,16 +4444,25 @@ void parse_xobject(
//fprintf(stdout, "\nparse_xobject: Byte Stream = : ");
//h_pprintln(stdout, res->ast);
- HBytes stm = H_CAST_BYTES(res->ast);
- res = h_parse(p_textstream, stm.token, stm.len);
-
- if (res) { // text found in stream
- // DEBUG
- //fprintf(stdout, "\nparse_xobject: Parsing text : ");
- //h_pprintln(stdout, res->ast);
-
-// xobj_r->node->xn.dict = 0;
- xobj_r->node->xn.textStream = res->ast;
+ /* Text stream is missing from object or failed to parse */
+ if (!res)
+ {
+ xobj_r->node->xn.textStream = NULL;
+ continue;
+ }
+ else
+ {
+ HBytes stm = H_CAST_BYTES(res->ast);
+ res = h_parse(p_textstream, stm.token, stm.len);
+
+ if (res) { // text found in stream
+ // DEBUG
+ //fprintf(stdout, "\nparse_xobject: Parsing text : ");
+ //h_pprintln(stdout, res->ast);
+
+// xobj_r->node->xn.dict = 0;
+ xobj_r->node->xn.textStream = res->ast;
+ }
}
}
}
--
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