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<th>Priority</th>
<td>medium
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Putting a lot of data into wl_buffer can lead to SIGSEGV"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69267">69267</a>
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
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<th>Summary</th>
<td>Putting a lot of data into wl_buffer can lead to SIGSEGV
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>OS</th>
<td>All
</td>
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<th>Reporter</th>
<td>mchqwerty@gmail.com
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<th>Hardware</th>
<td>Other
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<th>Status</th>
<td>NEW
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<th>Version</th>
<td>unspecified
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<th>Component</th>
<td>wayland
</td>
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<th>Product</th>
<td>Wayland
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<pre>Hey,
I just were browsing the code and I discovered that in wl_buffer_put is
possible to put into buffer more than 8192 bytes at once which means that we
will use memory which doesn't belong to wl_buffer. I don't know if it's on
purpose (because I did some debugging and nowhere were passed such an amount of
bytes) but still this can be a hole.
I successfully got SIGSEGV doing this:
...
...
void *long_data = malloc(big_number)
wl_connection_write(connection, long_data, big_number);
...
...</pre>
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