Comment 12 for bug 1904584

I got suspicious that the target has virt-ssh-helper always in run state.
With something that transports network data I'd expect more sleepy/poll states sometimes (as the NC case shows).

If I only start it manually it is in
0 0 35497 35490 20 0 69888 9924 poll_s S+ pts/0 0:00 \_ virt-ssh-helper qemu:///system

So does it really never return and busy loops on something - or is that a red herring?

Per strace it loops on this:

     0.000071 read(4, "\4\0\0\0\0\0\0\0", 16) = 8 <0.000011>
     0.000238 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000012>
     0.000040 read(0, "ba9821e493159a306fce6e8ff4adc1bd"..., 1024) = 1024 <0.000015>
     0.000043 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000010>
     0.000034 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000010>
     0.000035 write(3, "\nSHA512: 1d4f9ad2f209cca2d1d4cfd"..., 2048) = 2048 <0.000021>
     0.000057 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000012>
     0.000467 poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 3, 0) = 2 ([{fd=0, revents=POLLIN}, {fd=4, revents=POLLIN}]) <0.000016>
     0.000069 read(4, "\4\0\0\0\0\0\0\0", 16) = 8 <0.000011>
     0.000292 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000013>
     0.000049 read(0, "a26f12d123bdfc74ccc3\nHomepage: h"..., 1024) = 1024 <0.000012>
     0.000046 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000014>
     0.000051 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000010>
     0.000038 write(4, "\1\0\0\0\0\0\0\0", 8) = 8 <0.000014>
     0.000518 poll([{fd=0, events=POLLIN}, {fd=3, events=POLLIN|POLLOUT}, {fd=4, events=POLLIN}], 3, 0) = 3 ([{fd=0, revents=POLLIN}, {fd=3, revents=POLLOUT}, {fd=4, revents=POLLIN}]) <0.000016>

Initially that had some readable content like:
     0.000048 read(0, " <pae/>\n </features>\n <cpu "..., 1024) = 1024 <0.000016>
But later on it does seem to have binary data like:
     0.000061 read(0, "i@\0\330\6\247\1\2|2\0\1\0\0\0\252\231\21\0\0\0\0\0\253\231\21\0\324\33\25\0\370"..., 1024) = 1024 <0.000015>