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=219399 --- Comment #216 from Don Lewis <truckman@FreeBSD.org> --- LOL ... Prior to the fix in r321899, the top page of user memory for amd64 executables 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 SYSCALL 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 page to be used at all, similar to Linux. CloudABI64 got a similar fix. -- You are receiving this mail because: You are the assignee for the bug.
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