42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
From 77dc7f699beba606937b7ea23b50cf5974fa64b1 Mon Sep 17 00:00:00 2001
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From: Ken Sharp <Ken.Sharp@artifex.com>
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Date: Thu, 25 Jan 2024 11:55:49 +0000
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Subject: [PATCH 2/7] Bug 707510 - don't allow PDF files with bad Filters to
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overflow the debug buffer
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http://www.ghostscript.com/cgi-bin/findgit.cgi?77dc7f699beba606937b7ea23b50cf5974fa64b1
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Item #2 of the report.
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Allocate a buffer to hold the filter name, instead of assuming it will
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fit in a fixed buffer.
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Reviewed all the other PDFDEBUG cases, no others use a fixed buffer like
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this.
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---
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pdf/pdf_file.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/pdf/pdf_file.c b/pdf/pdf_file.c
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index 5698866..89298f0 100644
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--- a/pdf/pdf_file.c
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+++ b/pdf/pdf_file.c
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@@ -773,10 +773,14 @@ static int pdfi_apply_filter(pdf_context *ctx, pdf_dict *dict, pdf_name *n, pdf_
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if (ctx->args.pdfdebug)
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{
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- char str[100];
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+ char *str;
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+ str = gs_alloc_bytes(ctx->memory, n->length + 1, "temp string for debug");
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+ if (str == NULL)
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+ return_error(gs_error_VMerror);
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memcpy(str, (const char *)n->data, n->length);
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str[n->length] = '\0';
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dmprintf1(ctx->memory, "FILTER NAME:%s\n", str);
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+ gs_free_object(ctx->memory, str, "temp string for debug");
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}
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if (pdfi_name_is(n, "RunLengthDecode")) {
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--
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2.43.0
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