Date: Sat, 08 Feb 2020 21:59:47 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 243993] FreeBSD as Guest with 5+ with xnb(4) devices panic on call to sysctl -a in strlen Message-ID: <bug-243993-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=243993 Bug ID: 243993 Summary: FreeBSD as Guest with 5+ with xnb(4) devices panic on call to sysctl -a in strlen Product: Base System Version: 12.1-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: dpd@dpdtech.com Created attachment 211484 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=211484&action=edit Interactive kgdb CLI with VIFs=7 and info, core.txt from savecore. When running FreeBSD 12.1-stable r354267 amd64 as a guest under Xen 4.11 (XCP-ng 8.0), when adding 7 VIFs (xn NICs), a `sysctl -a ` panics the VM. XEN: Hypervisor version 4.11 detected. Hypervisor: Origin = "XenVMMXenVMM" It's not totally clear to me why, but it appears that in /usr/src/sys/libkern/strlen.c lines 99 and 100, in strlen(), that lp appears to be zero. Burt force testing show that four VIFs using xnb(4) are fine, adding the fifth produces the panic. Of note, I also have net.fibs=8, but haven't configured other fibs yet. -- You are receiving this mail because: You are the assignee for the bug.help
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