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<base href="https://bugs.dpdk.org/">
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<body><table border="1" cellspacing="0" cellpadding="8" class="bz_new_table">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - MPRQ buffer reference was not decremented upon MLX5_RXQ_CODE_NOMBUF"
href="https://bugs.dpdk.org/show_bug.cgi?id=1778">1778</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>MPRQ buffer reference was not decremented upon MLX5_RXQ_CODE_NOMBUF
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>22.11
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>UNCONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>ethdev
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>canary.overflow@gmail.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">drivers/net/mlx5/mlx5_rx.h mprq_buf_to_pkt(...):
In the external buffer attach case where hdrm_overlap > 0, the code did not
decrement the buffer refcnt if allocation struct rte_mbuf *next =
rte_pktmbuf_alloc(rxq->mp) fails
mprq_buf_to_pkt(...) {
...
if (hdrm_overlap > 0) {
__atomic_add_fetch(&buf->refcnt, 1, __ATOMIC_RELAXED);
...
MLX5_ASSERT(rxq->strd_scatter_en);
struct rte_mbuf *seg = rte_pktmbuf_alloc(rxq->mp);
if (unlikely(seg == NULL))
return MLX5_RXQ_CODE_NOMBUF;
SET_DATA_OFF(seg, 0);
...
}
}
</pre>
</div>
</p>
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