<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - linux kernel 4.5.0 gets SIGSEGV in latest intel_drv.so with xserver 1.18.3"
href="https://bugs.freedesktop.org/show_bug.cgi?id=95230">95230</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>linux kernel 4.5.0 gets SIGSEGV in latest intel_drv.so with xserver 1.18.3
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jason.vas.dias@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>With 100% reproducibility, the latest xf86-video-intel driver from GIT
(2.99.917)
when built against the latest Xorg server from GIT ( 1.18.3 ), and all the
latest GIT versions of all Xorg modules as listed in <a class="bz_bug_link
bz_status_NEW "
title="NEW - does not work with xserver 1.18.3 : core dump at kgem->retire() + different PixmapSyncDirtyHelper prototype"
href="show_bug.cgi?id=95140">Bug #95140</a> :
<a href="https://bugs.freedesktop.org/attachment.cgi?id=123274">https://bugs.freedesktop.org/attachment.cgi?id=123274</a> ,
the kernel gets a SIGSEGV and Xorg server quits and is restarted (by xdm) :
May 1 20:21:16 jvdlux kernel: [10675.162089] X[6342]: segfault at 7c ip
00007fcf2e4f1c2c sp 00007ffd0ec6ced0 error 6 in
intel_drv.so[7fcf2e4cf000+174000]
May 1 20:21:16 jvdlux xdm[6348]: pam_unix(xdm:session): session closed for
user jvd
I guess I'd have to know exactly were in memory the Xserver HAD
intel_drv.so loaded to interpret the 00007ffd0ec6ced0 instruction pointer
address ?
This happens reliably by browsing to any long page with firefox 46 (latest
version), clicking into the main window content, and holding down the
<PageDown>
OR <DownArrow> keys ; it doesn't happen by holding down these keys in emacs or
xterm (Firefox does have problems with scrolling, but...)
I did have to patch uxa/intel_driver.c in order to compile against xserver
1.18.3 code (<a class="bz_bug_link
bz_status_NEW "
title="NEW - does not work with xserver 1.18.3 : core dump at kgem->retire() + different PixmapSyncDirtyHelper prototype"
href="show_bug.cgi?id=95140">Bug #95140</a>) and sna/kgem.c (<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - sna_driver causes X-server to get SIGSEGV"
href="show_bug.cgi?id=95185">Bug #95185</a>) to avoid coredumping
during initialization .
My machine hardware and xorg configuration is fully documented in those bug
reports.
If there is any further information you require, please let me know .
I'm happy to help maintain xf86-video-intel.c to work with latest Xorg
server and Linux kernel - I really think it should be able to do so -
but I'd need a few pointers / help to get started .
How is the kernel calling into intel_drv.so ? How to map
0x00007ffd0ec6ced0 to a source file name and line number ?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>