diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/capability.c | 3 | ||||
| -rw-r--r-- | security/security.c | 7 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 16 |
3 files changed, 20 insertions, 6 deletions
diff --git a/security/capability.c b/security/capability.c index fae99db..7d3f38f 100644 --- a/security/capability.c +++ b/security/capability.c @@ -209,7 +209,8 @@ static int cap_inode_readlink(struct dentry *dentry) return 0; } -static int cap_inode_follow_link(struct dentry *dentry) +static int cap_inode_follow_link(struct dentry *dentry, struct inode *inode, + bool rcu) { return 0; } diff --git a/security/security.c b/security/security.c index d7c30b0..04c8fec 100644 --- a/security/security.c +++ b/security/security.c @@ -581,11 +581,12 @@ int security_inode_readlink(struct dentry *dentry) return security_ops->inode_readlink(dentry); } -int security_inode_follow_link(struct dentry *dentry) +int security_inode_follow_link(struct dentry *dentry, struct inode *inode, + bool rcu) { - if (unlikely(IS_PRIVATE(d_backing_inode(dentry)))) + if (unlikely(IS_PRIVATE(inode))) return 0; - return security_ops->inode_follow_link(dentry); + return security_ops->inode_follow_link(dentry, inode, rcu); } int security_inode_permission(struct inode *inode, int mask) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index d56a829..ffa5a64 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2861,11 +2861,23 @@ static int selinux_inode_readlink(struct dentry *dentry) return dentry_has_perm(cred, dentry, FILE__READ); } -static int selinux_inode_follow_link(struct dentry *dentry) +static int selinux_inode_follow_link(struct dentry *dentry, struct inode *inode, + bool rcu) { const struct cred *cred = current_cred(); + struct common_audit_data ad; + struct inode_security_struct *isec; + u32 sid; - return dentry_has_perm(cred, dentry, FILE__READ); + validate_creds(cred); + + ad.type = LSM_AUDIT_DATA_DENTRY; + ad.u.dentry = dentry; + sid = cred_sid(cred); + isec = inode->i_security; + + return avc_has_perm_flags(sid, isec->sid, isec->sclass, FILE__READ, &ad, + rcu ? MAY_NOT_BLOCK : 0); } static noinline int audit_inode_permission(struct inode *inode, |