If I debug a process using "strace -f" and the process spawns a child and waits for it, strace would freeze. ps would show both the child and the parent in the "T" state and if will stay that way untill kill -9. P.S. Is this related to bug 53191?
This looks very similar to bug #62591
Yes, bug 62591 is definitely a dup of this one (judging among other things by https://bugzilla.redhat.com/bugzilla/showattachment.cgi?attach_id=51924 ending with a child's _exit).
Still seeing it with strace-4.4-3 glibc-2.2.5-30 kernel-2.4.18-0.13
*** This bug has been marked as a duplicate of 62591 ***