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Bash leaks heredoc fd to child processes
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From: |
Siteshwar Vashisht |
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Subject: |
Bash leaks heredoc fd to child processes |
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Date: |
Tue, 17 Jan 2017 08:24:02 -0500 (EST) |
Hello,
Bash leaks heredoc fd to child processes if heredoc string contains command
substitution.
Reproducer code :
$ cat test.sh
#!/bin/bash
cat <<EOF
`pvs`
EOF
$ ./test.sh
File descriptor 3 (/tmp/sh-thd.Gnua0J) leaked on pvs invocation. Parent PID
9590: /bin/bash
PV VG Fmt Attr PSize PFree
/dev/sda2 fedora lvm2 a-- 11.00g 0
Attached patch fixes this leak.
--
--
Siteshwar Vashisht
0001-Do-not-leak-heredoc-fd-to-child-processes.patch
Description: Text Data