Description: vhost-vdpa: fix use-after-free of v->config_ctx
References:
Notes:
 carnil> vhost-vdpa (Vhost driver for vDPA-based backend) not built.
Bugs:
upstream: released (5.12-rc4) [f6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9
5.10-upstream-stable: released (5.10.26) [49ca3100fbaf864853c922c8f7a8fe7090a83860]
4.19-upstream-stable: N/A "Vulnerable code introduced later"
4.9-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.10.26-1)
4.19-buster-security: N/A "Vulnerable code introduced later"
4.9-stretch-security: N/A "Vulnerable code introduced later"