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Remove redundant null pointer checks before free()

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Per applicable standards, free() with a null pointer is a no-op.
Systems that don't observe that are ancient and no longer relevant.
Some PostgreSQL code already required this behavior, so this change
does not introduce any new requirements, just makes the code more
consistent.

Discussion: https://www.postgresql.org/message-id/flat/dac5d2d0-98f5-94d9-8e69-46da2413593d%40enterprisedb.com
This commit is contained in:
Peter Eisentraut
2022-06-16 21:50:56 +02:00
parent 098c703d30
commit 02c408e21a
38 changed files with 213 additions and 435 deletions
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18
src/interfaces/libpq/fe-auth.c
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@ -107,8 +107,7 @@ pg_GSS_continue(PGconn *conn, int payloadlen)
NULL,
NULL);
if (ginbuf.value)
free(ginbuf.value);
free(ginbuf.value);
if (goutbuf.length != 0)
{
@ -270,8 +269,7 @@ pg_SSPI_continue(PGconn *conn, int payloadlen)
NULL);
/* we don't need the input anymore */
if (inputbuf)
free(inputbuf);
free(inputbuf);
if (r != SEC_E_OK && r != SEC_I_CONTINUE_NEEDED)
{
@ -604,21 +602,18 @@ pg_SASL_init(PGconn *conn, int payloadlen)
goto error;
termPQExpBuffer(&mechanism_buf);
if (initialresponse)
free(initialresponse);
free(initialresponse);
return STATUS_OK;
error:
termPQExpBuffer(&mechanism_buf);
if (initialresponse)
free(initialresponse);
free(initialresponse);
return STATUS_ERROR;
oom_error:
termPQExpBuffer(&mechanism_buf);
if (initialresponse)
free(initialresponse);
free(initialresponse);
appendPQExpBufferStr(&conn->errorMessage,
libpq_gettext("out of memory\n"));
return STATUS_ERROR;
@ -831,8 +826,7 @@ pg_password_sendauth(PGconn *conn, const char *password, AuthRequest areq)
return STATUS_ERROR;
}
ret = pqPacketSend(conn, 'p', pwd_to_send, strlen(pwd_to_send) + 1);
if (crypt_pwd)
free(crypt_pwd);
free(crypt_pwd);
return ret;
}