https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=45cfcfbd71a02608db543c2e57371881aad4c0b1
commit 45cfcfbd71a02608db543c2e57371881aad4c0b1 Author: Takashi Yano <[email protected]> Date: Sat Apr 9 12:59:54 2022 +0900 Cygwin: pty: Close pseudo console only if the process is the owner. - Currently, close_pseudoconsole() is called unconditionally from fhandler_termios::process_sigs() on Ctrl-C. This causes deadlock if Ctrl-C is pressed while setup_pseudoconsole() is called. With this patch, close_pseudoconsole() is called only if the master process is the owner of the nat-pipe to avoid the deadlock. Diff: --- winsup/cygwin/fhandler_tty.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/winsup/cygwin/fhandler_tty.cc b/winsup/cygwin/fhandler_tty.cc index 4cb5f1411..c02dfb8ed 100644 --- a/winsup/cygwin/fhandler_tty.cc +++ b/winsup/cygwin/fhandler_tty.cc @@ -4152,7 +4152,8 @@ void fhandler_pty_slave::release_ownership_of_nat_pipe (tty *ttyp, fhandler_termios *fh) { - if (fh->get_major () == DEV_PTYM_MAJOR) + if (fh->get_major () == DEV_PTYM_MAJOR + && nat_pipe_owner_self (ttyp->nat_pipe_owner_pid)) { fhandler_pty_master *ptym = (fhandler_pty_master *) fh; WaitForSingleObject (ptym->pipe_sw_mutex, INFINITE);
