linux-kernel - [PATCH 2/2] fs: devpts_pty_new() return -ENOMEM if dentry allocation failed

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Date:	Fri,  4 Feb 2011 18:28:27 +0300
From:	Andrey Vagin <avagin@...nvz.org>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	Tejun Heo <tj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Andrey Vagin <avagin@...nvz.org>
Subject: [PATCH 2/2] fs: devpts_pty_new() return -ENOMEM if dentry allocation failed

In this case nobody can open a slave point, so will be better return error
from devpts_pty_new()

Signed-off-by: Andrey Vagin <avagin@...nvz.org>
---
 fs/devpts/inode.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 530b1f1..31474f3 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -479,6 +479,7 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
 	struct dentry *root = sb->s_root;
 	struct pts_fs_info *fsi = DEVPTS_SB(sb);
 	struct pts_mount_opts *opts = &fsi->mount_opts;
+	int ret = 0;
 	char s[12];
 
 	/* We're supposed to be given the slave end of a pty */
@@ -504,11 +505,14 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
 	if (dentry) {
 		d_add(dentry, inode);
 		fsnotify_create(root->d_inode, dentry);
+	} else {
+		iput(inode);
+		ret = -ENOMEM;
 	}
 
 	mutex_unlock(&root->d_inode->i_mutex);
 
-	return 0;
+	return ret;
 }
 
 struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
-- 
1.7.2.1

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