Reject out-of-range numeric timezone specifications.
In commit 631dc390f4
, we started to handle
simple numeric timezone offsets via the zic library instead of the old
CTimeZone/HasCTZSet kluge. However, we overlooked the fact that the zic
code will reject UTC offsets exceeding a week (which seems a bit arbitrary,
but not because it's too tight ...). This led to possibly setting
session_timezone to NULL, which results in crashes in most timezone-related
operations as of 9.4, and crashes in a small number of places even before
that. So check for NULL return from pg_tzset_offset() and report an
appropriate error message. Per bug #11014 from Duncan Gillis.
Back-patch to all supported branches, like the previous patch.
(Unfortunately, as of today that no longer includes 8.4.)
This commit is contained in:
parent
212825f813
commit
6412f3e2d0
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@ -349,6 +349,13 @@ check_timezone(char **newval, void **extra, GucSource source)
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}
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}
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/* Test for failure in pg_tzset_offset, which we assume is out-of-range */
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if (!new_tz)
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{
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GUC_check_errdetail("UTC timezone offset is out of range.");
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return false;
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}
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/*
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* Pass back data for assign_timezone to use
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*/
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@ -296,6 +296,9 @@ pg_tzset(const char *name)
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* The GMT offset is specified in seconds, positive values meaning west of
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* Greenwich (ie, POSIX not ISO sign convention). However, we use ISO
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* sign convention in the displayable abbreviation for the zone.
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*
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* Caution: this can fail (return NULL) if the specified offset is outside
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* the range allowed by the zic library.
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*/
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pg_tz *
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pg_tzset_offset(long gmtoffset)
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