linux-kernel - [PATCH] debugfs: Add check for module parameter name

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <8cf113648f45ccbf304735fcc4487adecd5b7082.1505996056.git.arvind.yadav.cs@gmail.com>
Date:   Thu, 21 Sep 2017 17:46:54 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     gregkh@...uxfoundation.org, viro@...iv.linux.org.uk
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] debugfs: Add check for module parameter name

Here, start_creating() is calling by debugfs_create_dir()
and debugfs_create_automount(). driver can pass name as NULL in
debugfs_create_dir and debugfs_create_automount. So we need to
add check for 'name'.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 fs/debugfs/inode.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index c59f015..aa5988d 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -292,6 +292,9 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 	if (IS_ERR(parent))
 		return parent;
 
+	if (!name)
+		return ERR_PTR(-ENOMEM);
+
 	error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
 			      &debugfs_mount_count);
 	if (error)
-- 
1.9.1