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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2014-03-07 13:13:33 +0200 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2014-03-07 13:43:28 +0200 |
| commit | ff9d757c67786b389f19abc3187d158adda500d8 (patch) | |
| tree | 0058725721e0c44f037f0c675b8bded5ca9ab382 | |
| parent | fb61ff85e16636e82fa6ad01f8e106b14b84844f (diff) | |
| download | postgresql-ff9d757c67786b389f19abc3187d158adda500d8.tar.gz postgresql-ff9d757c67786b389f19abc3187d158adda500d8.zip | |
Avoid memcpy() with same source and destination address.
The behavior of that is undefined, although unlikely to lead to problems in
practice.
Found by running regression tests with Valgrind.
| -rw-r--r-- | src/backend/tsearch/dict_ispell.c | 9 | ||||
| -rw-r--r-- | src/backend/utils/adt/tsvector.c | 3 |
2 files changed, 6 insertions, 6 deletions
diff --git a/src/backend/tsearch/dict_ispell.c b/src/backend/tsearch/dict_ispell.c index b6959e90e30..1cda70d2c43 100644 --- a/src/backend/tsearch/dict_ispell.c +++ b/src/backend/tsearch/dict_ispell.c @@ -127,20 +127,19 @@ dispell_lexize(PG_FUNCTION_ARGS) if (res == NULL) PG_RETURN_POINTER(NULL); - ptr = cptr = res; - while (ptr->lexeme) + cptr = res; + for (ptr = cptr; ptr->lexeme; ptr++) { if (searchstoplist(&(d->stoplist), ptr->lexeme)) { pfree(ptr->lexeme); ptr->lexeme = NULL; - ptr++; } else { - memcpy(cptr, ptr, sizeof(TSLexeme)); + if (cptr != ptr) + memcpy(cptr, ptr, sizeof(TSLexeme)); cptr++; - ptr++; } } cptr->lexeme = NULL; diff --git a/src/backend/utils/adt/tsvector.c b/src/backend/utils/adt/tsvector.c index 397e6c780bf..0dbbc9368bf 100644 --- a/src/backend/utils/adt/tsvector.c +++ b/src/backend/utils/adt/tsvector.c @@ -125,7 +125,8 @@ uniqueentry(WordEntryIN *a, int l, char *buf, int *outbuflen) buflen += res->poslen * sizeof(WordEntryPos) + sizeof(uint16); } res++; - memcpy(res, ptr, sizeof(WordEntryIN)); + if (res != ptr) + memcpy(res, ptr, sizeof(WordEntryIN)); } else if (ptr->entry.haspos) { |