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MINOR: log: keep a copy of s->flags early to avoid a dereference

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By placing s->flags into a local variable we'll be able to force it new
values when s is NULL.
This commit is contained in:
Willy Tarreau 2018-09-05 15:51:28 +02:00
parent 02fdf4f77b
commit b8bc52522c
1 changed files with 6 additions and 5 deletions
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11
src/log.c
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@ -1575,6 +1575,7 @@ int sess_build_logline(struct session *sess, struct stream *s, char *dst, size_t
struct http_txn *txn = s ? s->txn : NULL;
const struct strm_logs *logs = s ? &s->logs : NULL;
const struct connection *be_conn = s ? cs_conn(objt_cs(s->si[1].end)) : NULL;
unsigned int s_flags = s ? s->flags : 0;
struct buffer chunk;
char *uri;
char *spc;
@ -2070,15 +2071,15 @@ int sess_build_logline(struct session *sess, struct stream *s, char *dst, size_t
break;
case LOG_FMT_TERMSTATE: // %ts
LOGCHAR(sess_term_cond[(s->flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s->flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
LOGCHAR(sess_term_cond[(s_flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s_flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
*tmplog = '\0';
last_isspace = 0;
break;
case LOG_FMT_TERMSTATE_CK: // %tsc, same as TS with cookie state (for mode HTTP)
LOGCHAR(sess_term_cond[(s->flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s->flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
LOGCHAR(sess_term_cond[(s_flags & SF_ERR_MASK) >> SF_ERR_SHIFT]);
LOGCHAR(sess_fin_state[(s_flags & SF_FINST_MASK) >> SF_FINST_SHIFT]);
LOGCHAR((txn && (be->ck_opts & PR_CK_ANY)) ? sess_cookie[(txn->flags & TX_CK_MASK) >> TX_CK_SHIFT] : '-');
LOGCHAR((txn && (be->ck_opts & PR_CK_ANY)) ? sess_set_cookie[(txn->flags & TX_SCK_MASK) >> TX_SCK_SHIFT] : '-');
last_isspace = 0;
@ -2119,7 +2120,7 @@ int sess_build_logline(struct session *sess, struct stream *s, char *dst, size_t
break;
case LOG_FMT_RETRIES: // %rq
if (s->flags & SF_REDISP)
if (s_flags & SF_REDISP)
LOGCHAR('+');
ret = ltoa_o((s && s->si[1].conn_retries > 0) ?
(be->conn_retries - s->si[1].conn_retries) :