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From a10acfb1d2118f9a180181d3fed5399dbbe1df3c Mon Sep 17 00:00:00 2001
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From: Pádraig Brady <P@draigBrady.com>
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Date: Tue, 25 Feb 2014 10:58:48 +0000
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Subject: parse-datetime: fix crash or infloop in TZ="" parsing
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This was reported in http://bugs.gnu.org/16872
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from the coreutils command: date -d 'TZ="""'
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The infinite loop for this case was present since the
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initial TZ="" parsing support in commit de95bdc2 29-10-2004.
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This was changed to a crash or heap corruption depending
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on the platform with commit 2e3e4195 18-01-2010.
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* lib/parse-datetime.y (parse_datetime): Break out of the
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TZ="" parsing loop once the second significant " is found.
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Also skip over any subsequent whitespace to be consistent
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with the non TZ= case.
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---
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diff --git a/lib/parse-datetime.y b/lib/parse-datetime.y
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index 6ece765..0ba0a52 100644
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--- a/lib/parse-datetime.y
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+++ b/lib/parse-datetime.y
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@@ -1303,8 +1303,6 @@ parse_datetime (struct timespec *result, char const *p,
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char tz1buf[TZBUFSIZE];
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bool large_tz = TZBUFSIZE < tzsize;
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bool setenv_ok;
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- /* Free tz0, in case this is the 2nd or subsequent time through. */
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- free (tz0);
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tz0 = get_tz (tz0buf);
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z = tz1 = large_tz ? xmalloc (tzsize) : tz1buf;
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for (s = tzbase; *s != '"'; s++)
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@@ -1316,7 +1314,12 @@ parse_datetime (struct timespec *result, char const *p,
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if (!setenv_ok)
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goto fail;
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tz_was_altered = true;
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+
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p = s + 1;
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+ while (c = *p, c_isspace (c))
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+ p++;
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+
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+ break;
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}
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}
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--
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cgit v0.9.0.2
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