45 lines
1.4 KiB
Diff
45 lines
1.4 KiB
Diff
From 694ffe6e760878bf4983fc63f5c9fe109e19b80e Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Thu, 7 Jul 2022 18:27:02 +0900
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Subject: [PATCH] time-util: fix buffer-over-run
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Fixes #23928.
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(cherry picked from commit 9102c625a673a3246d7e73d8737f3494446bad4e)
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Resolves: #2139388
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---
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src/basic/time-util.c | 2 +-
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src/test/test-time-util.c | 5 +++++
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2 files changed, 6 insertions(+), 1 deletion(-)
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diff --git a/src/basic/time-util.c b/src/basic/time-util.c
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index c0841af8f3..4610c37273 100644
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--- a/src/basic/time-util.c
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+++ b/src/basic/time-util.c
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@@ -598,7 +598,7 @@ char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy) {
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t = b;
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}
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- n = MIN((size_t) k, l);
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+ n = MIN((size_t) k, l-1);
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l -= n;
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p += n;
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diff --git a/src/test/test-time-util.c b/src/test/test-time-util.c
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index 15f4a0c169..20ad521db7 100644
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--- a/src/test/test-time-util.c
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+++ b/src/test/test-time-util.c
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@@ -238,6 +238,11 @@ TEST(format_timespan) {
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test_format_timespan_accuracy(1);
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test_format_timespan_accuracy(USEC_PER_MSEC);
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test_format_timespan_accuracy(USEC_PER_SEC);
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+
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+ /* See issue #23928. */
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+ _cleanup_free_ char *buf;
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+ assert_se(buf = new(char, 5));
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+ assert_se(buf == format_timespan(buf, 5, 100005, 1000));
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}
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TEST(verify_timezone) {
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