From f24f22435dcc11389acc87e5586239c1819d217c Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 6 Nov 2019 22:55:40 +0100
Subject: [PATCH 05/11] futex: Set task::futex_state to DEAD right after handling futex exit
Git-commit: f24f22435dcc11389acc87e5586239c1819d217c
Patch-mainline: v5.5-rc1
References: bsc#1149032

Setting task::futex_state in do_exit() is rather arbitrarily placed for no
reason. Move it into the futex code.

Note, this is only done for the exit cleanup as the exec cleanup cannot set
the state to FUTEX_STATE_DEAD because the task struct is still in active
use.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.439511191@linutronix.de
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>

---
 kernel/exit.c  | 1 -
 kernel/futex.c | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index cd893b530902..f3b8fa1b8945 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -837,7 +837,6 @@ void __noreturn do_exit(long code)
 	 * Make sure we are holding no locks:
 	 */
 	debug_check_no_locks_held();
-	futex_exit_done(tsk);
 
 	if (tsk->io_context)
 		exit_io_context(tsk);
diff --git a/kernel/futex.c b/kernel/futex.c
index 909e4d3c3099..426dd71e170d 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -3682,6 +3682,7 @@ void futex_exec_release(struct task_struct *tsk)
 void futex_exit_release(struct task_struct *tsk)
 {
 	futex_exec_release(tsk);
+	futex_exit_done(tsk);
 }
 
 long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
-- 
2.16.4