[newlib-cygwin/cygwin-3_5-branch] Cygwin: console: Fix exit code for non-cygwin process.

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-------- Original message --------From: Takashi Yano via Cygwin-cvs <cygwin-cvs@cygwin.com> Date: 2/1/24  9:31 PM  (GMT-08:00) To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin/cygwin-3_5-branch] Cygwin: console: Fix exit code for non-cygwin process. https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=aa73e115242612bf8b5f8670c0c7d398693d1d84commit aa73e115242612bf8b5f8670c0c7d398693d1d84Author: Takashi Yano <takashi.yano@nifty.ne.jp>Date:   Fri Feb 2 13:59:19 2024 +0900    Cygwin: console: Fix exit code for non-cygwin process.        If non-cygwin process is executed in console, the exit code is not    set correctly. This is because the stub process for non-cygwin app    crashes in fhandler_console::set_disable_master_thread() due to NULL    pointer dereference. This bug was introduced by the commit:    3721a756b0d8 ("Cygwin: console: Make the console accessible from    other terminals."), that the pointer cons is accessed before fixing    when it is NULL. This patch fixes the issue.        Fixes: 3721a756b0d8 ("Cygwin: console: Make the console accessible from other terminals.")    Reported-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>    Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>Diff:--- winsup/cygwin/fhandler/console.cc | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)diff --git a/winsup/cygwin/fhandler/console.cc b/winsup/cygwin/fhandler/console.ccindex b924a6bf3..6a42b4949 100644--- a/winsup/cygwin/fhandler/console.cc+++ b/winsup/cygwin/fhandler/console.cc@@ -4537,9 +4537,6 @@ fhandler_console::need_console_handler () void fhandler_console::set_disable_master_thread (bool x, fhandler_console *cons) {-  const _minor_t unit = cons->get_minor ();-  if (con.disable_master_thread == x)-    return;   if (cons == NULL)     {       if (cygheap->ctty && cygheap->ctty->get_major () == DEV_CONS_MAJOR)@@ -4547,6 +4544,9 @@ fhandler_console::set_disable_master_thread (bool x, fhandler_console *cons)       else 	return;     }+  const _minor_t unit = cons->get_minor ();+  if (con.disable_master_thread == x)+    return;   cons->acquire_input_mutex (mutex_timeout);   con.disable_master_thread = x;   cons->release_input_mutex ();