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Date:   Wed, 30 Mar 2022 13:06:02 +1000
From:   Jamie Bainbridge <>
To:     Vlad Yasevich <>,
        Neil Horman <>,
        Marcelo Ricardo Leitner <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Paolo Abeni <>
Cc:     Jamie Bainbridge <>,,,
Subject: [PATCH v3 net] sctp: count singleton chunks in assoc user stats

Singleton chunks (INIT, HEARTBEAT PMTU probes, and SHUTDOWN-
COMPLETE) are not counted in SCTP_GET_ASOC_STATS "sas_octrlchunks"
counter available to the assoc owner.

These are all control chunks so they should be counted as such.

Add counting of singleton chunks so they are properly accounted for.

Fixes: 196d67593439 ("sctp: Add support to per-association statistics via a new SCTP_GET_ASSOC_STATS call")
Signed-off-by: Jamie Bainbridge <>
 net/sctp/outqueue.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index a18609f608fb786b2532a4febbd72a9737ab906c..bed34918b41f24810677adc0cd4fbd0859396a02 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -914,6 +914,7 @@ static void sctp_outq_flush_ctrl(struct sctp_flush_ctx *ctx)
 				ctx->asoc->>sk_err = -error;
+			ctx->asoc->stats.octrlchunks++;
@@ -939,6 +940,7 @@ static void sctp_outq_flush_ctrl(struct sctp_flush_ctx *ctx)
 			if (chunk->pmtu_probe) {
 				sctp_packet_singleton(ctx->transport, chunk, ctx->gfp);
+				ctx->asoc->stats.octrlchunks++;

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