Created attachment 1117409 [details]
kkk.sh

Description of problem:
$ cat kkk.sh
#!/bin/bash
trap 'echo Got sigint' SIGINT

while :; do ps axf|grep -q xxx && echo $msg; done &  #<--- generate a subshell
#do some other things
while read; do :; done

Version-Release number of selected component (if applicable):
all

How reproducible:
always

Steps to Reproduce:
1. run script attached
2. ps check the anonymous sub shell
3. type Ctrl+c, check the anonymous sub shell

Actual results:
anonymous sub-shell was be killed, after Ctrl+c
[yjh@dhcp-13-183 ~]$ ps axf| grep kkk
26302 pts/1    S+     0:00          |   |   |   \_ bash kkk.sh
26303 pts/1    S+     0:00          |   |   |       \_ bash kkk.sh
27332 pts/2    S+     0:00          |   |       \_ grep --color=auto kkk
[yjh@dhcp-13-183 ~]$ 
[yjh@dhcp-13-183 ~]$ ps axf| grep kkk
26302 pts/1    S+     0:00          |   |   |   \_ bash kkk.sh
30686 pts/2    S+     0:00          |   |       \_ grep --color=auto kkk


Expected results:
anonymous sub-shell inheritance the trap set,
  or support a way to set trap for *anonymous* sub-shell

Additional info: