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jffs2: remove from wait queue after schedule()

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@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@huawei.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Li Zefan
2018-07-16 07:22:11 +02:00
committed by Sebastian Huber
parent e650f4fc30
commit 52c50c7854
1 changed files with 1 additions and 0 deletions
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cpukit/libfs/src/jffs2/src/nodemgmt.c
+1
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@@ -181,6 +181,7 @@ 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)