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From 4895a5f05df22facb04bb1363fc63feff06a6ee0 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=D0=A0=D0=BE=D0=BC=D0=B0=D0=BD=20=D0=9F=D0=B5=D1=85=D0=BE?=
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=?UTF-8?q?=D0=B2?= <roman_pekhov>
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Date: Sun, 22 Jun 2014 03:51:50 +0400
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Subject: [PATCH 087/198] * grub-core/commands/loadenv.c (check_blocklists):
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Fix overlap check.
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---
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ChangeLog | 4 ++++
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grub-core/commands/loadenv.c | 13 ++-----------
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2 files changed, 6 insertions(+), 11 deletions(-)
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diff --git a/ChangeLog b/ChangeLog
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index 4ce6643..a2da974 100644
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--- a/ChangeLog
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+++ b/ChangeLog
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@@ -1,3 +1,7 @@
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+2014-06-21 Роман Пехов <roman_pekhov>
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+
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+ * grub-core/commands/loadenv.c (check_blocklists): Fix overlap check.
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+
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2014-06-21 Glenn Washburn <development@efficientek.com>
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* util/grub-install.c: Fix handling of --disk-module.
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diff --git a/grub-core/commands/loadenv.c b/grub-core/commands/loadenv.c
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index 6af8112..acd93d1 100644
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--- a/grub-core/commands/loadenv.c
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+++ b/grub-core/commands/loadenv.c
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@@ -263,7 +263,7 @@ check_blocklists (grub_envblk_t envblk, struct blocklist *blocklists,
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for (q = p->next; q; q = q->next)
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{
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grub_disk_addr_t s1, s2;
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- grub_disk_addr_t e1, e2, t;
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+ grub_disk_addr_t e1, e2;
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s1 = p->sector;
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e1 = s1 + ((p->length + GRUB_DISK_SECTOR_SIZE - 1) >> GRUB_DISK_SECTOR_BITS);
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@@ -271,16 +271,7 @@ check_blocklists (grub_envblk_t envblk, struct blocklist *blocklists,
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s2 = q->sector;
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e2 = s2 + ((q->length + GRUB_DISK_SECTOR_SIZE - 1) >> GRUB_DISK_SECTOR_BITS);
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- if (s2 > s1)
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- {
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- t = s2;
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- s2 = s1;
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- s1 = t;
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- t = e2;
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- e2 = e1;
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- e1 = t;
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- }
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- if (e1 > s2)
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+ if (s1 < e2 && s2 < e1)
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{
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/* This might be actually valid, but it is unbelievable that
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any filesystem makes such a silly allocation. */
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--
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2.7.4
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