blob: 255da992f089a0ecb19eec85dc22ccbfd8c23f8c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
From 11d11ff47a952f09a85be5ed85c83ee19f8a74d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
Date: Tue, 16 Dec 2014 16:53:08 +0100
Subject: [PATCH 47/54] smack: introduce a special case for tmpfs in
smack_d_instantiate()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Files created with __shmem_file_stup() appear to have somewhat fake
dentries which make them look like root directories and not get
the label the current process or ("*") star meant for tmpfs files.
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
security/smack/smack_lsm.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 2ec6cdb..bc43227 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3037,7 +3037,8 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
* of the superblock.
*/
if (opt_dentry->d_parent == opt_dentry) {
- if (sbp->s_magic == CGROUP_SUPER_MAGIC) {
+ switch (sbp->s_magic) {
+ case CGROUP_SUPER_MAGIC:
/*
* The cgroup filesystem is never mounted,
* so there's no opportunity to set the mount
@@ -3045,8 +3046,19 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
*/
sbsp->smk_root = &smack_known_star;
sbsp->smk_default = &smack_known_star;
+ isp->smk_inode = sbsp->smk_root;
+ break;
+ case TMPFS_MAGIC:
+ /*
+ * What about shmem/tmpfs anonymous files with dentry
+ * obtained from d_alloc_pseudo()?
+ */
+ isp->smk_inode = smk_of_current();
+ break;
+ default:
+ isp->smk_inode = sbsp->smk_root;
+ break;
}
- isp->smk_inode = sbsp->smk_root;
isp->smk_flags |= SMK_INODE_INSTANT;
goto unlockandout;
}
--
2.1.4
|
