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MINOR: quic: QUIC encryption level RX packets race issue

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The tree containing RX packets must be protected from concurrent accesses.
This commit is contained in:
Frédéric Lécaille 2021-12-06 08:56:38 +01:00 committed by Amaury Denoyelle
parent d61bc8db59
commit 7d807c93f4
2 changed files with 13 additions and 1 deletions
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12
include/haproxy/xprt_quic.h
View File

@ -1038,6 +1038,18 @@ static inline int qc_pkt_long(const struct quic_rx_packet *pkt)
return pkt->type != QUIC_PACKET_TYPE_SHORT;
}
/* Return 1 if there is RX packets for <qel> QUIC encryption level, 0 if not */
static inline int qc_el_rx_pkts(struct quic_enc_level *qel)
{
int ret;
HA_RWLOCK_RDLOCK(QUIC_LOCK, &qel->rx.pkts_rwlock);
ret = !eb_is_empty(&qel->rx.pkts);
HA_RWLOCK_RDUNLOCK(QUIC_LOCK, &qel->rx.pkts_rwlock);
return ret;
}
/* Release the memory for the RX packets which are no more referenced
* and consume their payloads which have been copied to the RX buffer
* for the connection.

2
src/xprt_quic.c
View File

@ -3133,7 +3133,7 @@ struct task *quic_conn_io_cb(struct task *t, void *context, unsigned int state)
*/
if (next_qel && next_qel != qel &&
(next_qel->tls_ctx.rx.flags & QUIC_FL_TLS_SECRETS_SET) &&
(!MT_LIST_ISEMPTY(&next_qel->rx.pqpkts) || !eb_is_empty(&next_qel->rx.pkts))) {
(!MT_LIST_ISEMPTY(&next_qel->rx.pqpkts) || qc_el_rx_pkts(next_qel))) {
qel = next_qel;
next_qel = NULL;
goto next_level;