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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-03-22 11:33:43 +0100
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-03-23 17:17:20 +0100
commitd067633b4483f3c7d971d8f889f35340a8635bb5 (patch)
tree4b27e195b6006b1fffe8c952d0a208b1e0491583
parentnilfs2: fix hang-up of cleaner after log writer returned with error (diff)
downloadlinux-d067633b4483f3c7d971d8f889f35340a8635bb5.tar.xz
linux-d067633b4483f3c7d971d8f889f35340a8635bb5.zip
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>
-rw-r--r--fs/nilfs2/segbuf.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/nilfs2/segbuf.c b/fs/nilfs2/segbuf.c
index 636eaafd6ea2..6129a431aa34 100644
--- a/fs/nilfs2/segbuf.c
+++ b/fs/nilfs2/segbuf.c
@@ -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;
}
/*