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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 - rte_malloc_socket failed to allocate with large alignment and ASan"
href="https://bugs.dpdk.org/show_bug.cgi?id=1708">1708</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>rte_malloc_socket failed to allocate with large alignment and ASan
</td>
</tr>
<tr>
<th>Product</th>
<td>DPDK
</td>
</tr>
<tr>
<th>Version</th>
<td>21.11
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>core
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dev@dpdk.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>plestringant@kalrayinc.com
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr></table>
<p>
<div class="bz_comment_block">
<pre class="bz_comment_text">After commit f92b9ebed03dbd140a5a7b921cb898e661a59068, I am unable to allocate
1MiB aligned 1MiB with rte_malloc_socket when DPDK is built with ASan.
Enter try_expand_heap_primary with pg_sz=0x200000, elt_size=0x100000,
align=0x100000
alloc_sz is set to 0x200000
Enter alloc_pages_on_heap
Enter find_suitable_element
Enter elem_start_pt with elem of size 0x200000
MALLOC_ELEM_TRAILER_LEN is non zero because of ASan
new_data_start is equal to elem because of alignment
There is no room for the header and it fails.
If my analysis is correct the formula used in try_expand_heap_primary to
compute alloc_sz is off. I suggest something like:
alloc_sz = RTE_ALIGN_CEIL(RTE_ALIGN_CEIL(elt_size + MALLOC_ELEM_TRAILER_LEN,
align) + MALLOC_ELEM_HEADER_LEN, pg_sz);
I am working with branch 21.11, but I think this issue affects all the branches
which contain commit f92b9ebed03dbd140a5a7b921cb898e661a59068
</pre>
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