On 28/08/14 05:02 PM, Sven Vermeulen wrote: > On Wed, Aug 27, 2014 at 05:34:20PM +0100, André Aparício wrote: >> I encountered the same problem with qemu/kvm but can't even login, I >> get random segfaults and even failed malloc assertions >> in /sbin/init, /sbin/rc or /bin/login (never past this). >> >> But it works fine with CONFIG_PAX_MEMORY_UDEREF disabled. > > I am not able to reproduce this :-( > > Host and guest are both on 3.15.5-hardened-r2 and both have UDEREF enabled. > > I tried emerging boost on the guest as recommended in another post but this > didn't fail. > > Wkr, > Sven Vermeulen >
My VM has 12 CPUs but I use MAKEOPTS=-j3. Maybe this affects reproducibility. My host is of unknown kernel, but I'm pretty sure it's not Gentoo, let alone Hardened. Also, I am using <cpu mode="host-passthrough"/> in libvirt (equivalent to -cpu host in qemu opts), so PAX detects PCID and enables strong UDEREF. I will try with pax_weakuderef as soon as I get a chance to reboot the VM.
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