[PATCH v1 16/34] qemuDomainBuildNamespace: Populate basic /dev from daemon's namespace
mprivozn at redhat.com
Thu Sep 3 14:40:52 UTC 2020
On 9/3/20 2:09 PM, Daniel P. Berrangé wrote:
> On Wed, Jul 22, 2020 at 11:40:10AM +0200, Michal Privoznik wrote:
>> As mentioned in previous commit, populating domain's namespace
>> from pre-exec() hook is dangerous. This commit moves population
>> of the namespace with basic /dev nodes (e.g. /dev/null, /dev/kvm,
>> etc.) into daemon's namespace.
>> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
>> src/qemu/qemu_domain_namespace.c | 23 +++++++++++------------
>> src/qemu/qemu_domain_namespace.h | 3 ++-
>> src/qemu/qemu_process.c | 2 +-
>> 3 files changed, 14 insertions(+), 14 deletions(-)
> I don't understand why, but this commit has broken QEMU startup on
> hosts without KVM. It now always dies with
> error : qemuNamespaceMknodItemInit:1341 : Unable to access /dev/kvm: No such file or directory
> This was git bisect identified, but since theres no mention of kvm in
> this patch, I'm going to assume the actual bug is hiding dormant in
> a previous patch until this patch activates the bug.
Let me try to reproduce and write a fix. I assume unloading KVM module
is enough, isn't it?
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