From: bugzilla@dpdk.org
To: dev@dpdk.org
Subject: [dpdk-dev] [Bug 347] TAPPMD frees buffers it fails to send
Date: Mon, 16 Sep 2019 08:36:00 +0000 [thread overview]
Message-ID: <bug-347-3@http.bugs.dpdk.org/> (raw)
https://bugs.dpdk.org/show_bug.cgi?id=347
Bug ID: 347
Summary: TAPPMD frees buffers it fails to send
Product: DPDK
Version: 19.08
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: dev@dpdk.org
Reporter: harry.walsh@gmail.com
Target Milestone: ---
static uint16_t
pmd_tx_burst(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
.
.
tap_write_mbufs(txq, num_mbufs, mbuf,
&num_packets, &num_tx_bytes);
num_tx++;
/* free original mbuf */
rte_pktmbuf_free(mbuf_in);
.
.
If tap_write_mbufs fails to send packets ( i.e. num_packets < num_mbufs )
In my situation I'm sending exactly one packet and it fails to send,
num_packets is passed out as zero, pmd_tx_burst frees the original buffer and
returns 1 back.
I then free the buffer because tx_burst returned zero, and this returns in a
double free.
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