Package: squirrelmail
Version: 1.4.9a-1
Severity: normal
Hi,
When /etc/squirrelmail/conf.pl is disconnected abruptly, it does not die
but spawns infinitely calls to clear via clear_screen().
I got 600 forks/s and 100% CPU for hours because the admin of one of
my vservers closed his ssh session abruptly :-(
My guess is that in the loop of the script to display the menu,
it clears the screen (so the fork to call clear) and waits for
input but with disconnected IO, there is no wait on input and
the process loops as crazy.
To reproduce the bug:
Simply connect remotely to a server, launch /etc/squirrelmail/conf.pl
and close the xterm running the ssh session.
This leaves the perl script running alone as explained.
Reconnect and watch your cpu ;-)
To fix the bug:
Either trap the IO disconnection event to quit nicely or at least
test for it in the loop but find a way to avoid looping without pause.
Phil
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