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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-05-28 12:36:04 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-05-28 12:36:41 -0400 |
| commit | f064a4f2633088ffb3269907fe58d9a410dc021f (patch) | |
| tree | d592a1d10de726c25fdf6864bf9934d4ca91fc5e /src/backend/utils/adt/xml.c | |
| parent | f014211849e405b1784f0bfc9d4f6bd7d06f269f (diff) | |
Fix null-dereference crash in parse_xml_decl().
parse_xml_decl's header comment says you can pass NULL for any unwanted
output parameter, but it failed to honor this contract for the "standalone"
flag. The only currently-affected caller is xml_recv, so the net effect is
that sending a binary XML value containing a standalone parameter in its
xml declaration would crash the backend. Per bug #6044 from Christopher
Dillard.
In passing, remove useless initializations of parse_xml_decl's output
parameters in xml_parse.
Back-patch to 8.3, where this code was introduced.
Diffstat (limited to 'src/backend/utils/adt/xml.c')
| -rw-r--r-- | src/backend/utils/adt/xml.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/backend/utils/adt/xml.c b/src/backend/utils/adt/xml.c index 9ce642f8556..e96eec6da84 100644 --- a/src/backend/utils/adt/xml.c +++ b/src/backend/utils/adt/xml.c @@ -1104,13 +1104,15 @@ parse_xml_decl(const xmlChar *str, size_t *lenp, if (xmlStrncmp(p, (xmlChar *) "'yes'", 5) == 0 || xmlStrncmp(p, (xmlChar *) "\"yes\"", 5) == 0) { - *standalone = 1; + if (standalone) + *standalone = 1; p += 5; } else if (xmlStrncmp(p, (xmlChar *) "'no'", 4) == 0 || xmlStrncmp(p, (xmlChar *) "\"no\"", 4) == 0) { - *standalone = 0; + if (standalone) + *standalone = 0; p += 4; } else @@ -1254,8 +1256,8 @@ xml_parse(text *data, XmlOptionType xmloption_arg, bool preserve_whitespace, { int res_code; size_t count; - xmlChar *version = NULL; - int standalone = -1; + xmlChar *version; + int standalone; res_code = parse_xml_decl(utf8string, &count, &version, NULL, &standalone); |