LKML: Kory Maincent: Re: [syzbot] [net?] general protection fault in generic_hwtstamp_ioctl

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>LKML: Kory Maincent: Re: [syzbot] [net?] general protection fault in generic_hwtstamp_ioctl_lower (2)</title><link href="/css/message.css" rel="stylesheet" type="text/css" /><link href="/css/wrap.css" rel="alternate stylesheet" type="text/css" title="wrap" /><link href="/css/nowrap.css" rel="stylesheet" type="text/css" title="nowrap" /><link href="/favicon.ico" rel="shortcut icon" /><script src="/js/simple-calendar.js" type="text/javascript"></script><script src="/js/styleswitcher.js" type="text/javascript"></script><link rel="alternate" type="application/rss+xml" title="lkml.org : last 100 messages" href="/rss.php" /><link rel="alternate" type="application/rss+xml" title="lkml.org : last messages by Kory Maincent" href="/groupie.php?aid=" /><script> var _paq = window._paq = window._paq || []; /* tracker methods like "setCustomDimension" should be called before "trackPageView" */ _paq.push(["setDoNotTrack", true]); _paq.push(["disableCookies"]); _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="//m.lkml.org/"; _paq.push(['setTrackerUrl', u+'matomo.php']); _paq.push(['setSiteId', '1']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s); })(); </script></head><body onload="es.jasper.simpleCalendar.init();" itemscope="itemscope" itemtype="http://schema.org/BlogPosting"><table border="0" cellpadding="0" cellspacing="0"><tr><td width="180" align="center"><a href="/"><img style="border:0;width:135px;height:32px" src="/images/toprowlk.gif" alt="lkml.org" /></a></td><td width="32">聽</td><td class="nb"><div><a class="nb" href="/lkml"> [lkml]</a> 聽 <a class="nb" href="/lkml/2025"> [2025]</a> 聽 <a class="nb" href="/lkml/2025/2"> [Feb]</a> 聽 <a class="nb" href="/lkml/2025/2/7"> [7]</a> 聽 <a class="nb" href="/lkml/last100"> [last100]</a> 聽 <a href="/rss.php"><img src="/images/rss-or.gif" border="0" alt="RSS Feed" /></a></div><div>Views: <a href="#" class="nowrap" onclick="setActiveStyleSheet('wrap');return false;">[wrap]</a><a href="#" class="wrap" onclick="setActiveStyleSheet('nowrap');return false;">[no wrap]</a> 聽 <a class="nb" href="/lkml/mheaders/2025/2/7/608" onclick="this.href='/lkml/headers'+'/2025/2/7/608';">[headers]</a>聽 <a href="/lkml/bounce/2025/2/7/608">[forward]</a>聽 </div></td><td width="32">聽</td></tr><tr><td valign="top"><div class="es-jasper-simpleCalendar" baseurl="/lkml/"></div><div class="threadlist">Messages in this thread</div><ul class="threadlist"><li class="root"><a href="/lkml/2025/2/4/838">First message in thread</a></li><li><a href="/lkml/2025/2/4/838">syzbot</a><ul><li><a href="/lkml/2025/2/5/676">Hillf Danton</a><ul><li><a href="/lkml/2025/2/5/684">syzbot</a></li></ul></li><li><a href="/lkml/2025/2/6/1830">Jakub Kicinski</a><ul><li class="origin"><a href="">Kory Maincent</a></li></ul></li></ul></li></ul></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerl.gif" width="32" height="32" alt="/" /></td><td class="c" rowspan="2" valign="top" style="padding-top: 1em"><table><tr><td><table><tr><td class="lp">Date</td><td class="rp" itemprop="datePublished">Fri, 7 Feb 2025 11:19:32 +0100</td></tr><tr><td class="lp">From</td><td class="rp" itemprop="author">Kory Maincent <></td></tr><tr><td class="lp">Subject</td><td class="rp" itemprop="name">Re: [syzbot] [net?] general protection fault in generic_hwtstamp_ioctl_lower (2)</td></tr></table></td><td></td></tr></table><pre itemprop="articleBody">On Thu, 6 Feb 2025 17:56:18 -0800<br />Jakub Kicinski <kuba@kernel.org> wrote:<br /><br />> On Tue, 04 Feb 2025 07:22:16 -0800 syzbot wrote:<br />> > Hello,<br />> > <br />> > syzbot found the following issue on:<br />> > <br />> > HEAD commit: 69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g..<br />> > git tree: upstream<br />> > console output: <a href="https://syzkaller.appspot.com/x/log.txt?x=13324b24580000">https://syzkaller.appspot.com/x/log.txt?x=13324b24580000</a><br />> > kernel config: <a href="https://syzkaller.appspot.com/x/.config?x=98d83cc1742b7377">https://syzkaller.appspot.com/x/.config?x=98d83cc1742b7377</a><br />> > dashboard link: <a href="https://syzkaller.appspot.com/bug?extid=86a8ab09a0f655f1ff19">https://syzkaller.appspot.com/bug?extid=86a8ab09a0f655f1ff19</a><br />> > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for<br />> > Debian) 2.40 syz repro:<br />> > <a href="https://syzkaller.appspot.com/x/repro.syz?x=17324b24580000">https://syzkaller.appspot.com/x/repro.syz?x=17324b24580000</a> C reproducer:<br />> > <a href="https://syzkaller.appspot.com/x/repro.c?x=161595f8580000">https://syzkaller.appspot.com/x/repro.c?x=161595f8580000</a> <br />> <br />> Hi Kory!<br />> <br />> Looks like syzbot wasn't able to bisect and didn't CC you.<br />> Please take a look, looks like struct kernel_hwtstamp_config<br />> gets into the ioctl paths.<br /><br />Hello Jakub,<br /><br />Thanks for transferring it to me. I will look at it.<br /><br />Regards,<br />-- <br />K枚ry Maincent, Bootlin<br />Embedded Linux and kernel engineering<br /><a href="https://bootlin.com">https://bootlin.com</a><br /><br /></pre></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerr.gif" width="32" height="32" alt="\" /></td></tr><tr><td align="right" valign="bottom"> 聽 </td></tr><tr><td align="right" valign="bottom">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerl.gif" width="32" height="32" alt="\" /></td><td class="c">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerr.gif" width="32" height="32" alt="/" /></td></tr><tr><td align="right" valign="top" colspan="2"> 聽 </td><td class="lm">Last update: 2025-02-07 11:20 聽聽 [W:0.348 / U:0.653 seconds]<br />漏2003-2020 <a href="http://blog.jasper.es/"><span itemprop="editor">Jasper Spaans</span></a>|hosted at <a href="https://www.digitalocean.com/?refcode=9a8e99d24cf9">Digital Ocean</a> and my Meterkast|<a href="http://blog.jasper.es/categories.html#lkml-ref">Read the blog</a></td><td>聽</td></tr></table><script language="javascript" src="/js/styleswitcher.js" type="text/javascript"></script></body></html>

CINXE.COM

LKML: Kory Maincent: Re: [syzbot] [net?] general protection fault in generic_hwtstamp_ioctl_lower (2)