diff options
| -rw-r--r-- | security/selinux/hooks.c | 30 | ||||
| -rw-r--r-- | security/selinux/include/objsec.h | 2 | ||||
| -rw-r--r-- | security/selinux/ss/services.c | 4 |
3 files changed, 17 insertions, 19 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 14a78199ee1..63ad57ab44f 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -71,6 +71,7 @@ #include <linux/audit.h> #include <linux/string.h> #include <linux/selinux.h> +#include <linux/mutex.h> #include "avc.h" #include "objsec.h" @@ -185,7 +186,7 @@ static int inode_alloc_security(struct inode *inode) return -ENOMEM; memset(isec, 0, sizeof(*isec)); - init_MUTEX(&isec->sem); + mutex_init(&isec->lock); INIT_LIST_HEAD(&isec->list); isec->inode = inode; isec->sid = SECINITSID_UNLABELED; @@ -843,15 +844,13 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent char *context = NULL; unsigned len = 0; int rc = 0; - int hold_sem = 0; if (isec->initialized) goto out; - down(&isec->sem); - hold_sem = 1; + mutex_lock(&isec->lock); if (isec->initialized) - goto out; + goto out_unlock; sbsec = inode->i_sb->s_security; if (!sbsec->initialized) { @@ -862,7 +861,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent if (list_empty(&isec->list)) list_add(&isec->list, &sbsec->isec_head); spin_unlock(&sbsec->isec_lock); - goto out; + goto out_unlock; } switch (sbsec->behavior) { @@ -885,7 +884,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent printk(KERN_WARNING "%s: no dentry for dev=%s " "ino=%ld\n", __FUNCTION__, inode->i_sb->s_id, inode->i_ino); - goto out; + goto out_unlock; } len = INITCONTEXTLEN; @@ -893,7 +892,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent if (!context) { rc = -ENOMEM; dput(dentry); - goto out; + goto out_unlock; } rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX, context, len); @@ -903,7 +902,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent NULL, 0); if (rc < 0) { dput(dentry); - goto out; + goto out_unlock; } kfree(context); len = rc; @@ -911,7 +910,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent if (!context) { rc = -ENOMEM; dput(dentry); - goto out; + goto out_unlock; } rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX, @@ -924,7 +923,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent "%d for dev=%s ino=%ld\n", __FUNCTION__, -rc, inode->i_sb->s_id, inode->i_ino); kfree(context); - goto out; + goto out_unlock; } /* Map ENODATA to the default file SID */ sid = sbsec->def_sid; @@ -960,7 +959,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent isec->sclass, &sid); if (rc) - goto out; + goto out_unlock; isec->sid = sid; break; case SECURITY_FS_USE_MNTPOINT: @@ -978,7 +977,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent isec->sclass, &sid); if (rc) - goto out; + goto out_unlock; isec->sid = sid; } } @@ -987,12 +986,11 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent isec->initialized = 1; +out_unlock: + mutex_unlock(&isec->lock); out: if (isec->sclass == SECCLASS_FILE) isec->sclass = inode_mode_to_security_class(inode->i_mode); - - if (hold_sem) - up(&isec->sem); return rc; } diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h index 0a39bfd1319..7d5a0289878 100644 --- a/security/selinux/include/objsec.h +++ b/security/selinux/include/objsec.h @@ -44,7 +44,7 @@ struct inode_security_struct { u32 sid; /* SID of this object */ u16 sclass; /* security class of this object */ unsigned char initialized; /* initialization flag */ - struct semaphore sem; + struct mutex lock; unsigned char inherit; /* inherit SID from parent entry */ }; diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 988079f4529..0c219a1b324 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -2578,7 +2578,7 @@ int selinux_netlbl_inode_permission(struct inode *inode, int mask) sock = SOCKET_I(inode); isec = inode->i_security; sksec = sock->sk->sk_security; - down(&isec->sem); + mutex_lock(&isec->lock); if (unlikely(sksec->nlbl_state == NLBL_REQUIRE && (mask & (MAY_WRITE | MAY_APPEND)))) { lock_sock(sock->sk); @@ -2586,7 +2586,7 @@ int selinux_netlbl_inode_permission(struct inode *inode, int mask) release_sock(sock->sk); } else rc = 0; - up(&isec->sem); + mutex_unlock(&isec->lock); return rc; } |