From: Zheng Yejian <zhengyejian1@huawei.com>
To: <gregkh@linuxfoundation.org>, <lee.jones@linaro.org>,
<stable@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <tglx@linutronix.de>, <cj.chengjian@huawei.com>,
<judy.chenhui@huawei.com>, <zhangjinhao2@huawei.com>
Subject: [PATCH 4.9.y 0/1] Bugfix for 781691c797de ("futex: Avoid violating the 10th rule of futex")
Date: Tue, 23 Feb 2021 22:41:50 +0800 [thread overview]
Message-ID: <20210223144151.916675-1-zhengyejian1@huawei.com> (raw)
This patch may fix the following bug:
Link:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/?h=linux-4.9.y&id=5b1d078507bd33ebf6c2083fa363cf5832809c19
> static int __fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q,
> struct task_struct *argowner)
> {
> struct futex_pi_state *pi_state = q->pi_state;
> struct task_struct *oldowner, *newowner;
> u32 uval, curval, newval, newtid;
> int err = 0;
>
> oldowner = pi_state->owner;
>
> /* Owner died? */
> if (!pi_state->owner)
> newtid |= FUTEX_OWNER_DIED;
Variable "newtid" is used without initialized.
Peter Zijlstra (1):
futex: Fix OWNER_DEAD fixup
kernel/futex.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--
2.25.4
next reply other threads:[~2021-02-23 14:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-23 14:41 Zheng Yejian [this message]
2021-02-23 14:41 ` [PATCH 4.9.y 1/1] futex: Fix OWNER_DEAD fixup Zheng Yejian
2021-02-24 11:19 ` Lee Jones
2021-02-25 6:29 ` Zhengyejian (Zetta)
2021-02-25 8:09 ` Lee Jones
2021-02-25 8:50 ` Zhengyejian (Zetta)
2021-03-01 14:15 ` Greg KH
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