linux-kernel - [PATCH 4/8] user ns: hook permission

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

Message-ID: <20061219230051.GE25904@sergelap.austin.ibm.com>
Date:	Tue, 19 Dec 2006 17:00:51 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	lkml <linux-kernel@...r.kernel.org>, containers@...ts.osdl.org
Subject: [PATCH 4/8] user ns: hook permission

From: Serge E. Hallyn <serue@...ibm.com>
Subject: [PATCH 4/8] user ns: hook permission

Hook permission to check vfsmnt->user_ns against current.

Signed-off-by: Serge E. Hallyn <serue@...ibm.com>
---
 fs/namei.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index e4f108f..d6687af 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -246,6 +246,8 @@ int permission(struct inode *inode, int 
 			return -EACCES;
 	}
 
+	if (nd && !task_mnt_same_uidns(current, nd->mnt))
+		return -EACCES;
 
 	/*
 	 * MAY_EXEC on regular files requires special handling: We override
@@ -433,6 +435,8 @@ static int exec_permission_lite(struct i
 {
 	umode_t	mode = inode->i_mode;
 
+	if (!task_mnt_same_uidns(current, nd->mnt))
+		return -EACCES;
 	if (inode->i_op && inode->i_op->permission)
 		return -EAGAIN;
 
-- 
1.4.1

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/