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jffs2: remove from wait queue after schedule()
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@huawei.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -179,6 +179,7 @@ int jffs2_reserve_space(struct jffs2_sb_info *c, uint32_t minsize,
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spin_unlock(&c->erase_completion_lock);
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schedule();
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remove_wait_queue(&c->erase_wait, &wait);
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} else
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spin_unlock(&c->erase_completion_lock);
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} else if (ret)
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