<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br><div dir="ltr"><blockquote type="cite">On Jun 16, 2020, at 1:44 AM, Thomas Gleixner <tglx@linutronix.de> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>kernel test robot <rong.a.chen@intel.com> writes:</span><br><blockquote type="cite"><span>FYI, we noticed the following commit (built with gcc-9):</span><br></blockquote><blockquote type="cite"><span></span><br></blockquote><blockquote type="cite"><span>commit: 2bbc68f8373c0631ebf137f376fbea00e8086be7 ("x86/entry: Convert Debug exception to IDTENTRY_DB")</span><br></blockquote><blockquote type="cite"><span>https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master</span><br></blockquote><span></span><br><span>Is the head of linux.git exposing the same problem or is this an</span><br><span>intermittent failure, which only affects bisectability?</span><br></div></blockquote><div><br></div><div>It sure looks deterministic:</div><div><br></div><span style="-webkit-text-size-adjust: auto; caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">ptrace08.c:62: BROK: Cannot find address of kernel symbol "do_debug"</span><div><font color="#000000"><span style="caret-color: rgb(0, 0, 0); -webkit-text-size-adjust: auto; background-color: rgb(255, 255, 255);"><br></span></font><blockquote type="cite"><div dir="ltr"><span></span><br><span>Thanks,</span><br><span></span><br><span> tglx</span><br></div></blockquote></div></body></html>