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BUG/MEDIUM: stconn: Properly forward kip to the opposite SE descriptor

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By refactoring the HTX to remove the extra field, a bug was introduced in
the stream-connector part. The <kip> (known input payload) value of a sedesc
was moved to <kop> (knwon output payload) using the same sedesc. Of course,
this is totally wrong. <kip> value of a sedesc must be forwarded to the
opposite side.

In addition, the operation is performed in sc_conn_send(). In this function,
we manipulate the stream-connectors. So se_fwd_kip() function was changed to
use the stream-connectors directely.

Now, the function sc_ep_fwd_kip() is now called with the both
stream-connectors to properly forward <kip> from on side to the opposite
side.

The bug is 3.3-specific. No backport needed.
This commit is contained in:
Christopher Faulet 2025-10-10 11:01:19 +02:00
parent 54f0ab08b8
commit 4145a61101
2 changed files with 6 additions and 5 deletions
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9
include/haproxy/stconn.h
View File

@ -148,13 +148,14 @@ static inline struct sedesc *se_opposite(struct sedesc *se)
return seo;
}
static inline void se_fwd_kip(struct sedesc *se)
/* stream connector version */
static inline void sc_ep_fwd_kip(struct stconn *sc_in, struct stconn *sc_out)
{
se->kop += se->kip;
se->kip = 0;
BUG_ON(sc_in == NULL || sc_out == NULL);
sc_out->sedesc->kop += sc_in->sedesc->kip;
sc_in->sedesc->kip = 0;
}
/* stream connector version */
static forceinline void sc_ep_zero(struct stconn *sc)
{
se_fl_zero(sc->sedesc);

2
src/stconn.c
View File

@ -1643,7 +1643,7 @@ int sc_conn_send(struct stconn *sc)
if (!conn->mux)
return 0;
se_fwd_kip(sc->sedesc);
sc_ep_fwd_kip(sco, sc);
if (sc_ep_have_ff_data(sc)) {
unsigned int send_flag = 0;