This is a note to let you know that I've just added the patch titled
jffs2: remove from wait queue after schedule()
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
jffs2-remove-from-wait-queue-after-schedule.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3ead9578443b66ddb3d50ed4f53af8a0c0298ec5 Mon Sep 17 00:00:00 2001
From: Li Zefan <lizefan@xxxxxxxxxx>
Date: Wed, 12 Feb 2014 12:44:57 -0800
Subject: jffs2: remove from wait queue after schedule()
From: Li Zefan <lizefan@xxxxxxxxxx>
commit 3ead9578443b66ddb3d50ed4f53af8a0c0298ec5 upstream.
@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.
Signed-off-by: Li Zefan <lizefan@xxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/jffs2/nodemgmt.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/jffs2/nodemgmt.c
+++ b/fs/jffs2/nodemgmt.c
@@ -139,6 +139,7 @@ int jffs2_reserve_space(struct jffs2_sb_
spin_unlock(&c->erase_completion_lock);
schedule();
+ remove_wait_queue(&c->erase_wait, &wait);
} else
spin_unlock(&c->erase_completion_lock);
} else if (ret)
Patches currently in stable-queue which might be from lizefan@xxxxxxxxxx are
queue-3.4/jffs2-avoid-soft-lockup-in-jffs2_reserve_space_gc.patch
queue-3.4/jffs2-remove-from-wait-queue-after-schedule.patch
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