linux-kernel - [PATCH] nilfs2: only call unlock_new_inode() if I

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Message-Id: <20200628070152.820311-1-ebiggers@kernel.org>
Date:   Sun, 28 Jun 2020 00:01:52 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     linux-nilfs@...r.kernel.org,
        Ryusuke Konishi <konishi.ryusuke@...il.com>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] nilfs2: only call unlock_new_inode() if I_NEW

From: Eric Biggers <ebiggers@...gle.com>

unlock_new_inode() is only meant to be called after a new inode has
already been inserted into the hash table.  But nilfs_new_inode() can
call it even before it has inserted the inode, triggering the WARNING in
unlock_new_inode().  Fix this by only calling unlock_new_inode() if the
inode has the I_NEW flag set, indicating that it's in the table.

Signed-off-by: Eric Biggers <ebiggers@...gle.com>
---
 fs/nilfs2/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 28009ec54420..3318dd1350b2 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -388,7 +388,8 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
 
  failed_after_creation:
 	clear_nlink(inode);
-	unlock_new_inode(inode);
+	if (inode->i_state & I_NEW)
+		unlock_new_inode(inode);
 	iput(inode);  /*
 		       * raw_inode will be deleted through
 		       * nilfs_evict_inode().
-- 
2.27.0