Commit d067633b authored Mar 22, 2010 by Ryusuke Konishi

nilfs2: fix imperfect completion wait in nilfs_wait_on_logs



nilfs_wait_on_logs has a potential to slip out before completion of
all bio requests when it met an error.  This synchronization fault may
cause unexpected results, for instance, violative access to freed
segment buffers from an end-bio callback routine.

This fixes the issue by ensuring that nilfs_wait_on_logs waits all
given logs.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

parent 110d735a

fs/nilfs2/segbuf.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -323,14 +323,14 @@ int nilfs_write_logs(struct list_head logs, struct the_nilfs nilfs)
		int nilfs_wait_on_logs(struct list_head *logs)
		{
		struct nilfs_segment_buffer *segbuf;
		int err;
		int err, ret = 0;

		list_for_each_entry(segbuf, logs, sb_list) {
		err = nilfs_segbuf_wait(segbuf);
		if (err)
		return err;
		if (err && !ret)
		ret = err;
		}
		return 0;
		return ret;
		}

		/*