linux-kernel - [PATCH] waitid si

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Message-Id: <20080308194122.4EEB226F991@magilla.localdomain>
Date:	Sat,  8 Mar 2008 11:41:22 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Oleg Nesterov <oleg@...sign.ru>, linux-kernel@...r.kernel.org
Subject: [PATCH] waitid si_code regression


In commit ee7c82da830ea860b1f9274f1f0cdf99f206e7c2, the magic (short)
cast when storing si_code was lost in wait_task_stopped.  This leaks
the in-kernel CLD_* values that do not match what userland expects.

Signed-off-by: Roland McGrath <roland@...hat.com>
Cc: Oleg Nesterov <oleg@...sign.ru>
---
 kernel/exit.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/exit.c b/kernel/exit.c
index cd20bf0..53872bf 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1378,7 +1378,7 @@ unlock_sig:
 	if (!retval && infop)
 		retval = put_user(0, &infop->si_errno);
 	if (!retval && infop)
-		retval = put_user(why, &infop->si_code);
+		retval = put_user((short)why, &infop->si_code);
 	if (!retval && infop)
 		retval = put_user(exit_code, &infop->si_status);
 	if (!retval && infop)
--
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