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28 lines
1.0 KiB
28 lines
1.0 KiB
2 years ago
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commit 515a6f53cd984d5e6e374fbee52772f967fc3c73
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Author: Paul Eggert <eggert@cs.ucla.edu>
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Date: Mon Sep 13 22:49:45 2021 -0700
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Fix subscript error with odd TZif file [BZ #28338]
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* time/tzfile.c (__tzfile_compute): Fix unlikely off-by-one bug
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that accessed before start of an array when an oddball-but-valid
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TZif file was queried with an unusual time_t value.
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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(cherry picked from commit 645277434a42efc547d2cac8bfede4da10b4049f)
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diff --git a/time/tzfile.c b/time/tzfile.c
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index 4377018a55936389..190a777152b31cee 100644
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--- a/time/tzfile.c
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+++ b/time/tzfile.c
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@@ -765,8 +765,7 @@ __tzfile_compute (__time64_t timer, int use_localtime,
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*leap_correct = leaps[i].change;
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if (timer == leaps[i].transition /* Exactly at the transition time. */
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- && ((i == 0 && leaps[i].change > 0)
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- || leaps[i].change > leaps[i - 1].change))
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+ && (leaps[i].change > (i == 0 ? 0 : leaps[i - 1].change)))
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{
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*leap_hit = 1;
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while (i > 0
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