[PATCH 3/3] jffs2: remove wait queue after schedule()

[Li Zefan]

@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 at vger.kernel.org>
Signed-off-by: Li Zefan <lizefan at 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