From: Li Zefan <lizefan@huawei.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mtd@lists.infradead.org, dwmw2@infradead.org,
LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 3/3] jffs2: remove wait queue after schedule()
Date: Sat, 8 Feb 2014 10:16:05 +0800 [thread overview]
Message-ID: <52F59365.5090001@huawei.com> (raw)
In-Reply-To: <52F592F2.6010008@huawei.com>
@wait is a local variable, so if we don't remove it from the wait queue
list, later wake_up() may end up accessing invalid memory.
This was spotted by eyes.
Cc: <stable@vger.kernel.org>
Signed-off-by: Li Zefan <lizefan@huawei.com>
---
fs/jffs2/nodemgmt.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index fb30161..610a22c 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -179,6 +179,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
spin_unlock(&c->erase_completion_lock);
schedule();
+ remove_wait_queue(&c->erase_wait, &wait);
} else
spin_unlock(&c->erase_completion_lock);
} else if (ret)
--
1.8.0.2
WARNING: multiple messages have this Message-ID (diff)
From: Li Zefan <lizefan@huawei.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: LKML <linux-kernel@vger.kernel.org>, <dwmw2@infradead.org>,
<linux-mtd@lists.infradead.org>
Subject: [PATCH 3/3] jffs2: remove wait queue after schedule()
Date: Sat, 8 Feb 2014 10:16:05 +0800 [thread overview]
Message-ID: <52F59365.5090001@huawei.com> (raw)
In-Reply-To: <52F592F2.6010008@huawei.com>
@wait is a local variable, so if we don't remove it from the wait queue
list, later wake_up() may end up accessing invalid memory.
This was spotted by eyes.
Cc: <stable@vger.kernel.org>
Signed-off-by: Li Zefan <lizefan@huawei.com>
---
fs/jffs2/nodemgmt.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/jffs2/nodemgmt.c b/fs/jffs2/nodemgmt.c
index fb30161..610a22c 100644
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -179,6 +179,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
spin_unlock(&c->erase_completion_lock);
schedule();
+ remove_wait_queue(&c->erase_wait, &wait);
} else
spin_unlock(&c->erase_completion_lock);
} else if (ret)
--
1.8.0.2
next prev parent reply other threads:[~2014-02-08 2:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-08 2:14 [PATCH 1/3] jffs2: fix unbalanced locking Li Zefan
2014-02-08 2:14 ` Li Zefan
2014-02-08 2:15 ` [PATCH 2/3] jffs2: avoid soft-lockup in jffs2_reserve_space_gc() Li Zefan
2014-02-08 2:15 ` Li Zefan
2014-02-11 23:54 ` Andrew Morton
2014-02-11 23:54 ` Andrew Morton
2014-02-12 1:00 ` Brian Norris
2014-02-12 1:00 ` Brian Norris
2014-02-12 1:42 ` Li Zefan
2014-02-12 1:42 ` Li Zefan
2014-02-08 2:16 ` Li Zefan [this message]
2014-02-08 2:16 ` [PATCH 3/3] jffs2: remove wait queue after schedule() Li Zefan
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