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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 - free called on rte_malloc block in vhost"
href="https://bugs.dpdk.org/show_bug.cgi?id=1553">1553</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>free called on rte_malloc block in vhost
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>vhost/virtio
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>stephen@networkplumber.org
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">If Gcc function attributes are added to rte_malloc, the compiler is able to
detect bugs where free is called on rte_malloc memory such as:
[2737/2957] Compiling C object
examples/dpdk-vhost_blk.p/vhost_blk_vhost_blk.c.o
In function ‘vhost_blk_bdev_construct’,
inlined from ‘vhost_blk_ctrlr_construct.constprop’ at
../examples/vhost_blk/vhost_blk.c:826:16:
../examples/vhost_blk/vhost_blk.c:779:17: warning: ‘free’ called on pointer
returned from a mismatched allocation function [-Wmismatched-dealloc]
779 | free(bdev);
| ^~~~~~~~~~
../examples/vhost_blk/vhost_blk.c:761:16: note: returned from ‘rte_zmalloc’
761 | bdev = rte_zmalloc(NULL, sizeof(*bdev), RTE_CACHE_LINE_SIZE);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
</pre>
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</p>
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