Michael J Gruber
7 years ago
parent
f790f9fd30
commit
da88d59031
@ -0,0 +1,78 @@
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From 6ba8c036e9a2147156a426550d97144d16f4cd02 Mon Sep 17 00:00:00 2001
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Message-Id: <6ba8c036e9a2147156a426550d97144d16f4cd02.1518615186.git.mjg@fedoraproject.org>
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From: Sebastian Rasmussen <sebras@gmail.com>
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Date: Mon, 29 Jan 2018 23:40:19 +0100
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Subject: [PATCH] Bug 698908: Resize object use and renumbering lists after
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repair.
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Previously repair might end up increasing xref_len, but the lists
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were not correspodingly expanded, leading to ASAN complaints.
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Signed-off-by: Michael J Gruber <mjg@fedoraproject.org>
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---
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source/pdf/pdf-write.c | 13 +++++++++----
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1 file changed, 9 insertions(+), 4 deletions(-)
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diff --git a/source/pdf/pdf-write.c b/source/pdf/pdf-write.c
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index 9fcdbf0a..beb49252 100644
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--- a/source/pdf/pdf-write.c
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+++ b/source/pdf/pdf-write.c
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@@ -633,7 +633,8 @@ expand_lists(fz_context *ctx, pdf_write_state *opts, int num)
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{
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int i;
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- num++;
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+ /* objects are numbered 0..num and maybe two additional objects for linearization */
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+ num += 3;
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opts->use_list = fz_resize_array(ctx, opts->use_list, num, sizeof(*opts->use_list));
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opts->ofs_list = fz_resize_array(ctx, opts->ofs_list, num, sizeof(*opts->ofs_list));
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opts->gen_list = fz_resize_array(ctx, opts->gen_list, num, sizeof(*opts->gen_list));
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@@ -1522,9 +1523,9 @@ static void preloadobjstms(fz_context *ctx, pdf_document *doc)
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{
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pdf_obj *obj;
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int num;
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- int xref_len = pdf_xref_len(ctx, doc);
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- for (num = 0; num < xref_len; num++)
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+ /* xref_len may change due to repair, so check it every iteration */
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+ for (num = 0; num < pdf_xref_len(ctx, doc); num++)
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{
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if (pdf_get_xref_entry(ctx, doc, num)->type == 'o')
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{
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@@ -2755,7 +2756,7 @@ static void initialise_write_state(fz_context *ctx, pdf_document *doc, const pdf
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opts->continue_on_error = in_opts->continue_on_error;
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opts->errors = in_opts->errors;
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- expand_lists(ctx, opts, xref_len + 3);
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+ expand_lists(ctx, opts, xref_len);
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}
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/* Free the resources held by the dynamic write options */
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@@ -2892,6 +2893,8 @@ do_pdf_save_document(fz_context *ctx, pdf_document *doc, pdf_write_state *opts,
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{
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pdf_ensure_solid_xref(ctx, doc, xref_len);
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preloadobjstms(ctx, doc);
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+ xref_len = pdf_xref_len(ctx, doc); /* May have changed due to repair */
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+ expand_lists(ctx, opts, xref_len);
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}
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/* Sweep & mark objects from the trailer */
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@@ -2900,6 +2903,7 @@ do_pdf_save_document(fz_context *ctx, pdf_document *doc, pdf_write_state *opts,
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else
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{
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xref_len = pdf_xref_len(ctx, doc); /* May have changed due to repair */
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+ expand_lists(ctx, opts, xref_len);
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for (num = 0; num < xref_len; num++)
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opts->use_list[num] = 1;
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}
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@@ -2920,6 +2924,7 @@ do_pdf_save_document(fz_context *ctx, pdf_document *doc, pdf_write_state *opts,
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if ((opts->do_garbage >= 2 || opts->do_linear) && !opts->do_incremental)
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{
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xref_len = pdf_xref_len(ctx, doc); /* May have changed due to repair */
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+ expand_lists(ctx, opts, xref_len);
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while (xref_len > 0 && !opts->use_list[xref_len-1])
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xref_len--;
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}
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--
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2.16.1.312.g365a692731
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