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From ce8663ee13e68b8f21dce6e2cf612d3809519787 Mon Sep 17 00:00:00 2001
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From: Alasdair G Kergon <agk@redhat.com>
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Date: Wed, 10 Jan 2018 02:03:32 +0000
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Subject: [PATCH 12/25] allocation: Avoid exceeding array bounds in allocation
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tag code
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If _limit_to_one_area_per_tag() changes nothing it writes beyond
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the array.
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(cherry picked from commit bacc94233368cf136b55e2574e969e7f53b31c6c)
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Conflicts:
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WHATS_NEW
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---
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WHATS_NEW | 4 ++++
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lib/metadata/lv_manip.c | 3 ++-
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2 files changed, 6 insertions(+), 1 deletion(-)
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diff --git a/WHATS_NEW b/WHATS_NEW
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index 2163a5e..9375a86 100644
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--- a/WHATS_NEW
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+++ b/WHATS_NEW
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@@ -1,3 +1,7 @@
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+Version 2.02.178 -
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+=====================================
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+ Avoid exceeding array bounds in allocation tag processing.
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+
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Version 2.02.177 - 18th December 2017
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=====================================
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When writing text metadata content, use complete 4096 byte blocks.
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diff --git a/lib/metadata/lv_manip.c b/lib/metadata/lv_manip.c
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index 70dc2d9..ac30dad 100644
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--- a/lib/metadata/lv_manip.c
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+++ b/lib/metadata/lv_manip.c
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@@ -2737,7 +2737,8 @@ static int _limit_to_one_area_per_tag(struct alloc_handle *ah, struct alloc_stat
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s++;
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}
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- alloc_state->areas[u].pva = NULL;
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+ if (u < alloc_state->areas_size)
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+ alloc_state->areas[u].pva = NULL;
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return 1;
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}
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--
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1.8.3.1
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