Date: Mon, 07 Aug 2017 23:23:43 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219399] System panics after several hours of 14-threads-compilation orgies using poudriere on AMD Ryzen... Message-ID: <bug-219399-8-blbwu0g6JZ@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-219399-8@https.bugs.freebsd.org/bugzilla/> References: <bug-219399-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219399 --- Comment #216 from Don Lewis <truckman@FreeBSD.org> --- LOL ...=20 Prior to the fix in r321899, the top page of user memory for amd64 executab= les was used by the shared page, the contents of which are controlled by the kernel. This page does contain the signal trampoline, which contains a SYS= CALL instruction, which made me very suspicious based on my experiments with executing code in this page. The SYSCALL instruction is located well away = from the top of the page, though. I may try playing with this instruction if I = ever have the time. After r321899, the shared page is moved lower and we don't allow the top pa= ge to be used at all, similar to Linux. CloudABI64 got a similar fix. --=20 You are receiving this mail because: You are the assignee for the bug.=
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