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Message-Id: <1323225914-23985-1-git-send-email-msb@chromium.org> Date: Tue, 6 Dec 2011 18:45:14 -0800 From: Mandeep Singh Baines <msb@...omium.org> To: Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org Cc: Mandeep Singh Baines <msb@...omium.org>, Thomas Gleixner <tglx@...utronix.de>, Pavel Emelyanov <xemul@...nvz.org>, Oleg Nesterov <oleg@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Kees Cook <keescook@...omium.org> Subject: [PATCH] sys_getppid: add missing rcu_dereference In order to safely dereference current->real_parent inside an rcu_read_lock, we need an rcu_dereference. Signed-off-by: Mandeep Singh Baines <msb@...omium.org> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Pavel Emelyanov <xemul@...nvz.org> Cc: Oleg Nesterov <oleg@...hat.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: Kees Cook <keescook@...omium.org> --- kernel/timer.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/timer.c b/kernel/timer.c index dbaa624..9c3c62b 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1368,7 +1368,7 @@ SYSCALL_DEFINE0(getppid) int pid; rcu_read_lock(); - pid = task_tgid_vnr(current->real_parent); + pid = task_tgid_vnr(rcu_dereference(current->real_parent)); rcu_read_unlock(); return pid; -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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