qemu processes still present on exit

[maggie44]

If using ctrl+c to exit, it reports qemu-system-x86_64: terminating on signal 2 but the process is still running in the background. Each new run creates a new process and they begin to build up. Killing with kill -9 seems to corrupt the .img file (not tested with COW, just raw):

ps aux
USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.0  0.1   4240  1560 pts/0    Ss   13:33   0:00 bash
root         113 71.7 37.3 1300320 373348 pts/0  Tl   13:36   0:51 qemu-system-x86_64 -machine q35,accel=kvm -cpu max -smp cores=4 -m 512M -drive if=pflash,format=raw,u
root         125  0.0  0.2   5892  2776 pts/0    R+   13:37   0:00 ps aux