diff options
| author | Noah Misch <noah@leadboat.com> | 2014-02-17 09:33:31 -0500 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2014-02-17 09:33:37 -0500 |
| commit | 0b7026d964c79515c8df00b37ab41d550bcdcbde (patch) | |
| tree | d7da8c1299e1168454b05be8f88897ea3ebfc221 /src/backend/utils/adt/tsquery.c | |
| parent | 6a10e57b0f79678243f42e2a6033723975aa8530 (diff) | |
Predict integer overflow to avoid buffer overruns.
Several functions, mostly type input functions, calculated an allocation
size such that the calculation wrapped to a small positive value when
arguments implied a sufficiently-large requirement. Writes past the end
of the inadvertent small allocation followed shortly thereafter.
Coverity identified the path_in() vulnerability; code inspection led to
the rest. In passing, add check_stack_depth() to prevent stack overflow
in related functions.
Back-patch to 8.4 (all supported versions). The non-comment hstore
changes touch code that did not exist in 8.4, so that part stops at 9.0.
Noah Misch and Heikki Linnakangas, reviewed by Tom Lane.
Security: CVE-2014-0064
Diffstat (limited to 'src/backend/utils/adt/tsquery.c')
| -rw-r--r-- | src/backend/utils/adt/tsquery.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/backend/utils/adt/tsquery.c b/src/backend/utils/adt/tsquery.c index 5baa02b1c03..625421545c4 100644 --- a/src/backend/utils/adt/tsquery.c +++ b/src/backend/utils/adt/tsquery.c @@ -517,8 +517,13 @@ parse_tsquery(char *buf, return query; } - /* Pack the QueryItems in the final TSQuery struct to return to caller */ + if (TSQUERY_TOO_BIG(list_length(state.polstr), state.sumlen)) + ereport(ERROR, + (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), + errmsg("tsquery is too large"))); commonlen = COMPUTESIZE(list_length(state.polstr), state.sumlen); + + /* Pack the QueryItems in the final TSQuery struct to return to caller */ query = (TSQuery) palloc0(commonlen); SET_VARSIZE(query, commonlen); query->size = list_length(state.polstr); |