libvirt users - Apr 2019 - Error creating virtual network: failed to run '/usr/sbin/dnsmasq --version': : Success

I deleted my port virbr0 using brctl command and now when I want to create
a virtual network, it gives me this error:

Error creating virtual network: failed to run '/usr/sbin/dnsmasq
--version': : Success
Here is my systemlog: https://pastebin.com/xjuVnsyL

How to rectify this?
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On 4/1/19 2:16 PM, Harsh Gondaliya wrote:
> I deleted my port virbr0 using brctl command and now when I want to create
> a virtual network, it gives me this error:
> 
> Error creating virtual network: failed to run '/usr/sbin/dnsmasq
> --version': : Success
> Here is my systemlog: https://pastebin.com/xjuVnsyL
> 
> How to rectify this?
Oh, we are overwritting the actual error with something useless. The 
real error is:

Apr  1 17:41:05 dpdk-OptiPlex-5040 libvirtd.service: 1506: error : 
virCommandWait:2553 : internal error: Child process (LC_ALL=C 
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 
/usr/sbin/dnsmasq --version) unexpected exit status 126: libvirt:  error 
: cannot execute binary /usr/sbin/dnsmasq: Permission denied

I suggest reviewing and possibly fixing permissions on dnsmasq binary 
(assuming libvirtd is ran as root). Or maybe there's some more info in 
audit.log if this is caused by SELinux.

Michal