diff options
| -rw-r--r-- | security/smack/smack_lsm.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index ff81026f6ddb..b20ef0602267 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -1860,12 +1860,34 @@ static int smack_file_receive(struct file *file) int may = 0; struct smk_audit_info ad; struct inode *inode = file_inode(file); + struct socket *sock; + struct task_smack *tsp; + struct socket_smack *ssp; if (unlikely(IS_PRIVATE(inode))) return 0; smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH); smk_ad_setfield_u_fs_path(&ad, file->f_path); + + if (S_ISSOCK(inode->i_mode)) { + sock = SOCKET_I(inode); + ssp = sock->sk->sk_security; + tsp = current_security(); + /* + * If the receiving process can't write to the + * passed socket or if the passed socket can't + * write to the receiving process don't accept + * the passed socket. + */ + rc = smk_access(tsp->smk_task, ssp->smk_out, MAY_WRITE, &ad); + rc = smk_bu_file(file, may, rc); + if (rc < 0) + return rc; + rc = smk_access(ssp->smk_in, tsp->smk_task, MAY_WRITE, &ad); + rc = smk_bu_file(file, may, rc); + return rc; + } /* * This code relies on bitmasks. */ |