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From 510ac1b166c642ccf6a57515922730c73f492f55 Mon Sep 17 00:00:00 2001
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From: Andrey Borzenkov <arvidjaar@gmail.com>
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Date: Mon, 25 Feb 2013 22:42:25 +0100
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Subject: [PATCH 158/482] * grub-core/normal/menu_entry.c
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(insert_string): fix off by one access to unallocated memory.
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---
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ChangeLog | 5 +++++
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grub-core/normal/menu_entry.c | 11 ++++++-----
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2 files changed, 11 insertions(+), 5 deletions(-)
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diff --git a/ChangeLog b/ChangeLog
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index 107c049..cc5d5e3 100644
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--- a/ChangeLog
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+++ b/ChangeLog
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@@ -1,5 +1,10 @@
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2013-02-25 Andrey Borzenkov <arvidjaar@gmail.com>
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+ * grub-core/normal/menu_entry.c (insert_string): fix off by one
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+ access to unallocated memory.
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+
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+2013-02-25 Andrey Borzenkov <arvidjaar@gmail.com>
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+
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* Makefile.util.def: Add partmap/msdos.c to common library.
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* include/grub/msdos_partition.h: Add GRUB_PC_PARTITION_TYPE_LDM
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* grub-core/disk/ldm.c: Check for existence of
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diff --git a/grub-core/normal/menu_entry.c b/grub-core/normal/menu_entry.c
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index 7cd67f3..85f97da 100644
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--- a/grub-core/normal/menu_entry.c
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+++ b/grub-core/normal/menu_entry.c
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@@ -393,11 +393,12 @@ insert_string (struct screen *screen, const char *s, int update)
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if (! screen->lines)
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return 0;
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- /* Scroll down. */
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- grub_memmove (screen->lines + screen->line + 2,
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- screen->lines + screen->line + 1,
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- ((screen->num_lines - screen->line - 2)
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- * sizeof (struct line)));
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+ /* Shift down if not appending after the last line. */
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+ if (screen->line < screen->num_lines - 2)
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+ grub_memmove (screen->lines + screen->line + 2,
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+ screen->lines + screen->line + 1,
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+ ((screen->num_lines - screen->line - 2)
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+ * sizeof (struct line)));
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if (! init_line (screen, screen->lines + screen->line + 1))
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return 0;
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--
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1.8.2.1
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