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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2012-07-15 13:28:09 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2012-07-15 13:28:09 -0400 |
| commit | d6270e2df9f5fc8803d8171e0aad98a55257f921 (patch) | |
| tree | 79e842d05143d144a7a7b7e6be64ce55a45249a0 /src/backend/utils/adt/regexp.c | |
| parent | d066cc548de7f21e84aeb27bd43388ba82534759 (diff) | |
| download | postgresql-d6270e2df9f5fc8803d8171e0aad98a55257f921.tar.gz postgresql-d6270e2df9f5fc8803d8171e0aad98a55257f921.zip | |
Prevent corner-case core dump in rfree().
rfree() failed to cope with the case that pg_regcomp() had initialized the
regex_t struct but then failed to allocate any memory for re->re_guts (ie,
the first malloc call in pg_regcomp() failed). It would try to touch the
guts struct anyway, and thus dump core. This is a sufficiently narrow
corner case that it's not surprising it's never been seen in the field;
but still a bug is a bug, so patch all active branches.
Noted while investigating whether we need to call pg_regfree after a
failure return from pg_regcomp. Other than this bug, it turns out we
don't, so adjust comments appropriately.
Diffstat (limited to 'src/backend/utils/adt/regexp.c')
| -rw-r--r-- | src/backend/utils/adt/regexp.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/src/backend/utils/adt/regexp.c b/src/backend/utils/adt/regexp.c index c590f7e950e..67e205d0816 100644 --- a/src/backend/utils/adt/regexp.c +++ b/src/backend/utils/adt/regexp.c @@ -187,9 +187,8 @@ RE_compile_and_cache(text *text_re, int cflags, Oid collation) if (regcomp_result != REG_OKAY) { - /* re didn't compile */ + /* re didn't compile (no need for pg_regfree, if so) */ pg_regerror(regcomp_result, &re_temp.cre_re, errMsg, sizeof(errMsg)); - /* XXX should we pg_regfree here? */ ereport(ERROR, (errcode(ERRCODE_INVALID_REGULAR_EXPRESSION), errmsg("invalid regular expression: %s", errMsg))); |