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unsafe signal handler


From: Tim Waugh
Subject: unsafe signal handler
Date: Mon, 18 Jul 2005 14:06:28 +0100
User-agent: Mutt/1.4.2.1i

The signal handler termination_unwind_protect() can call
maybe_save_shell_history() -> append_history() -> history_do_write()
-> history_filename() -> xmalloc() -> malloc()

and malloc() is not safe to call from a signal handler.  This affects
bash-2.05b as well as bash-3.0.

Tim.
*/ ref 163235

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