24 lines
876 B
Diff
24 lines
876 B
Diff
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From 0004dced935879e190dd660e1f82f1d751454c78 Mon Sep 17 00:00:00 2001
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From: Ming-Hung Tsai <mtsai@redhat.com>
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Date: Tue, 1 Jun 2021 11:24:11 +0800
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Subject: [PATCH] [thin_show_metadata] Fix out-of-bounds access
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---
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thin-provisioning/thin_show_metadata.cc | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/thin-provisioning/thin_show_metadata.cc b/thin-provisioning/thin_show_metadata.cc
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index bdbab3f7..dbc7a80c 100644
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--- a/thin-provisioning/thin_show_metadata.cc
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+++ b/thin-provisioning/thin_show_metadata.cc
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@@ -206,7 +206,8 @@ namespace {
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void run() {
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auto line_length = 80;
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- for (block_address b = 0; b < 2000; b++) {
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+ block_address nr_blocks = std::min<block_address>(2000, bm_.get_nr_blocks());
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+ for (block_address b = 0; b < nr_blocks; b++) {
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block_manager::read_ref rr = bm_.read_lock(b);
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if (!(b % line_length)) {
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