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authorCasey Schaufler <casey@schaufler-ca.com>2012-05-23 17:46:58 -0700
committerCasey Schaufler <casey@schaufler-ca.com>2012-07-13 15:49:23 -0700
commiteb982cb4cf6405b97ea1f9e1d10864981f269d46 (patch)
tree8d89448e0ef96d587ea8052021a721e632b4b318 /security/smack
parent417c6c8ee2eb6975f357d8975af94ba5fbeaf82d (diff)
downloadvexpress-lsk-eb982cb4cf6405b97ea1f9e1d10864981f269d46.tar.gz
Smack: fix smack_new_inode bogosities
In January of 2012 Al Viro pointed out three bits of code that he titled "new_inode_smack bogosities". This patch repairs these errors. 1. smack_sb_kern_mount() included a NULL check that is impossible. The check and NULL case are removed. 2. smack_kb_kern_mount() included pointless locking. The locking is removed. Since this is the only place that lock was used the lock is removed from the superblock_smack structure. 3. smk_fill_super() incorrectly and unnecessarily set the Smack label for the smackfs root inode. The assignment has been removed. Targeted for git://gitorious.org/smack-next/kernel.git Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security/smack')
-rw-r--r--security/smack/smack.h1
-rw-r--r--security/smack/smack_lsm.c8
-rw-r--r--security/smack/smackfs.c1
3 files changed, 2 insertions, 8 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index cc361b8f3d1..76feb31eb82 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -43,7 +43,6 @@ struct superblock_smack {
char *smk_hat;
char *smk_default;
int smk_initialized;
- spinlock_t smk_sblock; /* for initialization */
};
struct socket_smack {
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index ee0bb5735f3..29bb4e7fa5e 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -251,7 +251,6 @@ static int smack_sb_alloc_security(struct super_block *sb)
sbsp->smk_floor = smack_known_floor.smk_known;
sbsp->smk_hat = smack_known_hat.smk_known;
sbsp->smk_initialized = 0;
- spin_lock_init(&sbsp->smk_sblock);
sb->s_security = sbsp;
@@ -332,13 +331,10 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
char *commap;
char *nsp;
- spin_lock(&sp->smk_sblock);
- if (sp->smk_initialized != 0) {
- spin_unlock(&sp->smk_sblock);
+ if (sp->smk_initialized != 0)
return 0;
- }
+
sp->smk_initialized = 1;
- spin_unlock(&sp->smk_sblock);
for (op = data; op != NULL; op = commap) {
commap = strchr(op, ',');
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index 1810c9a4ed4..3686db7e2c6 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -2051,7 +2051,6 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
}
root_inode = sb->s_root->d_inode;
- root_inode->i_security = new_inode_smack(smack_known_floor.smk_known);
return 0;
}