diff options
Diffstat (limited to 'security/smack/smack_lsm.c')
| -rw-r--r-- | security/smack/smack_lsm.c | 390 |
1 files changed, 298 insertions, 92 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 98b3195347ab..0d030b4513c8 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -30,7 +30,6 @@ #include <net/netlabel.h> #include <net/cipso_ipv4.h> #include <linux/audit.h> - #include "smack.h" #define task_security(task) (task_cred_xxx((task), security)) @@ -103,14 +102,24 @@ struct inode_smack *new_inode_smack(char *smack) static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode) { int rc; + struct smk_audit_info ad; + char *sp, *tsp; rc = cap_ptrace_may_access(ctp, mode); if (rc != 0) return rc; - rc = smk_access(current_security(), task_security(ctp), MAY_READWRITE); + sp = current_security(); + tsp = task_security(ctp); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, ctp); + + /* we won't log here, because rc can be overriden */ + rc = smk_access(sp, tsp, MAY_READWRITE, NULL); if (rc != 0 && capable(CAP_MAC_OVERRIDE)) - return 0; + rc = 0; + + smack_log(sp, tsp, MAY_READWRITE, rc, &ad); return rc; } @@ -125,14 +134,24 @@ static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode) static int smack_ptrace_traceme(struct task_struct *ptp) { int rc; + struct smk_audit_info ad; + char *sp, *tsp; rc = cap_ptrace_traceme(ptp); if (rc != 0) return rc; - rc = smk_access(task_security(ptp), current_security(), MAY_READWRITE); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, ptp); + + sp = current_security(); + tsp = task_security(ptp); + /* we won't log here, because rc can be overriden */ + rc = smk_access(tsp, sp, MAY_READWRITE, NULL); if (rc != 0 && has_capability(ptp, CAP_MAC_OVERRIDE)) - return 0; + rc = 0; + + smack_log(tsp, sp, MAY_READWRITE, rc, &ad); return rc; } @@ -327,8 +346,14 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data) static int smack_sb_statfs(struct dentry *dentry) { struct superblock_smack *sbp = dentry->d_sb->s_security; + int rc; + struct smk_audit_info ad; - return smk_curacc(sbp->smk_floor, MAY_READ); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + + rc = smk_curacc(sbp->smk_floor, MAY_READ, &ad); + return rc; } /** @@ -346,8 +371,12 @@ static int smack_sb_mount(char *dev_name, struct path *path, char *type, unsigned long flags, void *data) { struct superblock_smack *sbp = path->mnt->mnt_sb->s_security; + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path(&ad, *path); - return smk_curacc(sbp->smk_floor, MAY_WRITE); + return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad); } /** @@ -361,10 +390,14 @@ static int smack_sb_mount(char *dev_name, struct path *path, static int smack_sb_umount(struct vfsmount *mnt, int flags) { struct superblock_smack *sbp; + struct smk_audit_info ad; - sbp = mnt->mnt_sb->s_security; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_mountpoint); + smk_ad_setfield_u_fs_path_mnt(&ad, mnt); - return smk_curacc(sbp->smk_floor, MAY_WRITE); + sbp = mnt->mnt_sb->s_security; + return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad); } /* @@ -441,15 +474,20 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir, static int smack_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) { - int rc; char *isp; + struct smk_audit_info ad; + int rc; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry); isp = smk_of_inode(old_dentry->d_inode); - rc = smk_curacc(isp, MAY_WRITE); + rc = smk_curacc(isp, MAY_WRITE, &ad); if (rc == 0 && new_dentry->d_inode != NULL) { isp = smk_of_inode(new_dentry->d_inode); - rc = smk_curacc(isp, MAY_WRITE); + smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry); + rc = smk_curacc(isp, MAY_WRITE, &ad); } return rc; @@ -466,18 +504,24 @@ static int smack_inode_link(struct dentry *old_dentry, struct inode *dir, static int smack_inode_unlink(struct inode *dir, struct dentry *dentry) { struct inode *ip = dentry->d_inode; + struct smk_audit_info ad; int rc; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + /* * You need write access to the thing you're unlinking */ - rc = smk_curacc(smk_of_inode(ip), MAY_WRITE); - if (rc == 0) + rc = smk_curacc(smk_of_inode(ip), MAY_WRITE, &ad); + if (rc == 0) { /* * You also need write access to the containing directory */ - rc = smk_curacc(smk_of_inode(dir), MAY_WRITE); - + smk_ad_setfield_u_fs_path_dentry(&ad, NULL); + smk_ad_setfield_u_fs_inode(&ad, dir); + rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad); + } return rc; } @@ -491,17 +535,24 @@ static int smack_inode_unlink(struct inode *dir, struct dentry *dentry) */ static int smack_inode_rmdir(struct inode *dir, struct dentry *dentry) { + struct smk_audit_info ad; int rc; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + /* * You need write access to the thing you're removing */ - rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE); - if (rc == 0) + rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); + if (rc == 0) { /* * You also need write access to the containing directory */ - rc = smk_curacc(smk_of_inode(dir), MAY_WRITE); + smk_ad_setfield_u_fs_path_dentry(&ad, NULL); + smk_ad_setfield_u_fs_inode(&ad, dir); + rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad); + } return rc; } @@ -525,15 +576,19 @@ static int smack_inode_rename(struct inode *old_inode, { int rc; char *isp; + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry); isp = smk_of_inode(old_dentry->d_inode); - rc = smk_curacc(isp, MAY_READWRITE); + rc = smk_curacc(isp, MAY_READWRITE, &ad); if (rc == 0 && new_dentry->d_inode != NULL) { isp = smk_of_inode(new_dentry->d_inode); - rc = smk_curacc(isp, MAY_READWRITE); + smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry); + rc = smk_curacc(isp, MAY_READWRITE, &ad); } - return rc; } @@ -548,13 +603,15 @@ static int smack_inode_rename(struct inode *old_inode, */ static int smack_inode_permission(struct inode *inode, int mask) { + struct smk_audit_info ad; /* * No permission to check. Existence test. Yup, it's there. */ if (mask == 0) return 0; - - return smk_curacc(smk_of_inode(inode), mask); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_inode(&ad, inode); + return smk_curacc(smk_of_inode(inode), mask, &ad); } /** @@ -566,13 +623,16 @@ static int smack_inode_permission(struct inode *inode, int mask) */ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr) { + struct smk_audit_info ad; /* * Need to allow for clearing the setuid bit. */ if (iattr->ia_valid & ATTR_FORCE) return 0; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); - return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE); + return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); } /** @@ -584,7 +644,12 @@ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr) */ static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) { - return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ); + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + smk_ad_setfield_u_fs_path_mnt(&ad, mnt); + return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad); } /** @@ -602,6 +667,7 @@ static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry) static int smack_inode_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags) { + struct smk_audit_info ad; int rc = 0; if (strcmp(name, XATTR_NAME_SMACK) == 0 || @@ -619,8 +685,11 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name, } else rc = cap_inode_setxattr(dentry, name, value, size, flags); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + if (rc == 0) - rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE); + rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); return rc; } @@ -672,7 +741,12 @@ static void smack_inode_post_setxattr(struct dentry *dentry, const char *name, */ static int smack_inode_getxattr(struct dentry *dentry, const char *name) { - return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ); + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); + + return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad); } /* @@ -686,6 +760,7 @@ static int smack_inode_getxattr(struct dentry *dentry, const char *name) */ static int smack_inode_removexattr(struct dentry *dentry, const char *name) { + struct smk_audit_info ad; int rc = 0; if (strcmp(name, XATTR_NAME_SMACK) == 0 || @@ -696,8 +771,10 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name) } else rc = cap_inode_removexattr(dentry, name); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, dentry); if (rc == 0) - rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE); + rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad); return rc; } @@ -856,12 +933,16 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { int rc = 0; + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path(&ad, file->f_path); if (_IOC_DIR(cmd) & _IOC_WRITE) - rc = smk_curacc(file->f_security, MAY_WRITE); + rc = smk_curacc(file->f_security, MAY_WRITE, &ad); if (rc == 0 && (_IOC_DIR(cmd) & _IOC_READ)) - rc = smk_curacc(file->f_security, MAY_READ); + rc = smk_curacc(file->f_security, MAY_READ, &ad); return rc; } @@ -875,7 +956,11 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd, */ static int smack_file_lock(struct file *file, unsigned int cmd) { - return smk_curacc(file->f_security, MAY_WRITE); + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path_dentry(&ad, file->f_path.dentry); + return smk_curacc(file->f_security, MAY_WRITE, &ad); } /** @@ -889,8 +974,12 @@ static int smack_file_lock(struct file *file, unsigned int cmd) static int smack_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg) { + struct smk_audit_info ad; int rc; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS); + smk_ad_setfield_u_fs_path(&ad, file->f_path); + switch (cmd) { case F_DUPFD: case F_GETFD: @@ -898,7 +987,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd, case F_GETLK: case F_GETOWN: case F_GETSIG: - rc = smk_curacc(file->f_security, MAY_READ); + rc = smk_curacc(file->f_security, MAY_READ, &ad); break; case F_SETFD: case F_SETFL: @@ -906,10 +995,10 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd, case F_SETLKW: case F_SETOWN: case F_SETSIG: - rc = smk_curacc(file->f_security, MAY_WRITE); + rc = smk_curacc(file->f_security, MAY_WRITE, &ad); break; default: - rc = smk_curacc(file->f_security, MAY_READWRITE); + rc = smk_curacc(file->f_security, MAY_READWRITE, &ad); } return rc; @@ -944,14 +1033,21 @@ static int smack_file_send_sigiotask(struct task_struct *tsk, { struct file *file; int rc; + char *tsp = tsk->cred->security; + struct smk_audit_info ad; /* * struct fown_struct is never outside the context of a struct file */ file = container_of(fown, struct file, f_owner); - rc = smk_access(file->f_security, tsk->cred->security, MAY_WRITE); + /* we don't log here as rc can be overriden */ + rc = smk_access(file->f_security, tsp, MAY_WRITE, NULL); if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE)) - return 0; + rc = 0; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, tsk); + smack_log(file->f_security, tsp, MAY_WRITE, rc, &ad); return rc; } @@ -964,7 +1060,10 @@ static int smack_file_send_sigiotask(struct task_struct *tsk, static int smack_file_receive(struct file *file) { int may = 0; + struct smk_audit_info ad; + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_fs_path(&ad, file->f_path); /* * This code relies on bitmasks. */ @@ -973,7 +1072,7 @@ static int smack_file_receive(struct file *file) if (file->f_mode & FMODE_WRITE) may |= MAY_WRITE; - return smk_curacc(file->f_security, may); + return smk_curacc(file->f_security, may, &ad); } /* @@ -1053,6 +1152,22 @@ static int smack_kernel_create_files_as(struct cred *new, } /** + * smk_curacc_on_task - helper to log task related access + * @p: the task object + * @access : the access requested + * + * Return 0 if access is permitted + */ +static int smk_curacc_on_task(struct task_struct *p, int access) +{ + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, p); + return smk_curacc(task_security(p), access, &ad); +} + +/** * smack_task_setpgid - Smack check on setting pgid * @p: the task object * @pgid: unused @@ -1061,7 +1176,7 @@ static int smack_kernel_create_files_as(struct cred *new, */ static int smack_task_setpgid(struct task_struct *p, pid_t pgid) { - return smk_curacc(task_security(p), MAY_WRITE); + return smk_curacc_on_task(p, MAY_WRITE); } /** @@ -1072,7 +1187,7 @@ static int smack_task_setpgid(struct task_struct *p, pid_t pgid) */ static int smack_task_getpgid(struct task_struct *p) { - return smk_curacc(task_security(p), MAY_READ); + return smk_curacc_on_task(p, MAY_READ); } /** @@ -1083,7 +1198,7 @@ static int smack_task_getpgid(struct task_struct *p) */ static int smack_task_getsid(struct task_struct *p) { - return smk_curacc(task_security(p), MAY_READ); + return smk_curacc_on_task(p, MAY_READ); } /** @@ -1111,7 +1226,7 @@ static int smack_task_setnice(struct task_struct *p, int nice) rc = cap_task_setnice(p, nice); if (rc == 0) - rc = smk_curacc(task_security(p), MAY_WRITE); + rc = smk_curacc_on_task(p, MAY_WRITE); return rc; } @@ -1128,7 +1243,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio) rc = cap_task_setioprio(p, ioprio); if (rc == 0) - rc = smk_curacc(task_security(p), MAY_WRITE); + rc = smk_curacc_on_task(p, MAY_WRITE); return rc; } @@ -1140,7 +1255,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio) */ static int smack_task_getioprio(struct task_struct *p) { - return smk_curacc(task_security(p), MAY_READ); + return smk_curacc_on_task(p, MAY_READ); } /** @@ -1158,7 +1273,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy, rc = cap_task_setscheduler(p, policy, lp); if (rc == 0) - rc = smk_curacc(task_security(p), MAY_WRITE); + rc = smk_curacc_on_task(p, MAY_WRITE); return rc; } @@ -1170,7 +1285,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy, */ static int smack_task_getscheduler(struct task_struct *p) { - return smk_curacc(task_security(p), MAY_READ); + return smk_curacc_on_task(p, MAY_READ); } /** @@ -1181,7 +1296,7 @@ static int smack_task_getscheduler(struct task_struct *p) */ static int smack_task_movememory(struct task_struct *p) { - return smk_curacc(task_security(p), MAY_WRITE); + return smk_curacc_on_task(p, MAY_WRITE); } /** @@ -1199,18 +1314,23 @@ static int smack_task_movememory(struct task_struct *p) static int smack_task_kill(struct task_struct *p, struct siginfo *info, int sig, u32 secid) { + struct smk_audit_info ad; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, p); /* * Sending a signal requires that the sender * can write the receiver. */ if (secid == 0) - return smk_curacc(task_security(p), MAY_WRITE); + return smk_curacc(task_security(p), MAY_WRITE, &ad); /* * If the secid isn't 0 we're dealing with some USB IO * specific behavior. This is not clean. For one thing * we can't take privilege into account. */ - return smk_access(smack_from_secid(secid), task_security(p), MAY_WRITE); + return smk_access(smack_from_secid(secid), task_security(p), + MAY_WRITE, &ad); } /** @@ -1221,11 +1341,15 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info, */ static int smack_task_wait(struct task_struct *p) { + struct smk_audit_info ad; + char *sp = current_security(); + char *tsp = task_security(p); int rc; - rc = smk_access(current_security(), task_security(p), MAY_WRITE); + /* we don't log here, we can be overriden */ + rc = smk_access(sp, tsp, MAY_WRITE, NULL); if (rc == 0) - return 0; + goto out_log; /* * Allow the operation to succeed if either task @@ -1239,8 +1363,12 @@ static int smack_task_wait(struct task_struct *p) * the smack value. */ if (capable(CAP_MAC_OVERRIDE) || has_capability(p, CAP_MAC_OVERRIDE)) - return 0; - + rc = 0; + /* we log only if we didn't get overriden */ + out_log: + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); + smk_ad_setfield_u_tsk(&ad, p); + smack_log(sp, tsp, MAY_WRITE, rc, &ad); return rc; } @@ -1456,12 +1584,19 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap) int sk_lbl; char *hostsp; struct socket_smack *ssp = sk->sk_security; + struct smk_audit_info ad; rcu_read_lock(); hostsp = smack_host_label(sap); if (hostsp != NULL) { sk_lbl = SMACK_UNLABELED_SOCKET; - rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE); +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET); + ad.a.u.net.family = sap->sin_family; + ad.a.u.net.dport = sap->sin_port; + ad.a.u.net.v4info.daddr = sap->sin_addr.s_addr; +#endif + rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE, &ad); } else { sk_lbl = SMACK_CIPSO_SOCKET; rc = 0; @@ -1657,6 +1792,25 @@ static void smack_shm_free_security(struct shmid_kernel *shp) } /** + * smk_curacc_shm : check if current has access on shm + * @shp : the object + * @access : access requested + * + * Returns 0 if current has the requested access, error code otherwise + */ +static int smk_curacc_shm(struct shmid_kernel *shp, int access) +{ + char *ssp = smack_of_shm(shp); + struct smk_audit_info ad; + +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC); + ad.a.u.ipc_id = shp->shm_perm.id; +#endif + return smk_curacc(ssp, access, &ad); +} + +/** * smack_shm_associate - Smack access check for shm * @shp: the object * @shmflg: access requested @@ -1665,11 +1819,10 @@ static void smack_shm_free_security(struct shmid_kernel *shp) */ static int smack_shm_associate(struct shmid_kernel *shp, int shmflg) { - char *ssp = smack_of_shm(shp); int may; may = smack_flags_to_may(shmflg); - return smk_curacc(ssp, may); + return smk_curacc_shm(shp, may); } /** @@ -1681,7 +1834,6 @@ static int smack_shm_associate(struct shmid_kernel *shp, int shmflg) */ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd) { - char *ssp; int may; switch (cmd) { @@ -1704,9 +1856,7 @@ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd) default: return -EINVAL; } - - ssp = smack_of_shm(shp); - return smk_curacc(ssp, may); + return smk_curacc_shm(shp, may); } /** @@ -1720,11 +1870,10 @@ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd) static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr, int shmflg) { - char *ssp = smack_of_shm(shp); int may; may = smack_flags_to_may(shmflg); - return smk_curacc(ssp, may); + return smk_curacc_shm(shp, may); } /** @@ -1766,6 +1915,25 @@ static void smack_sem_free_security(struct sem_array *sma) } /** + * smk_curacc_sem : check if current has access on sem + * @sma : the object + * @access : access requested + * + * Returns 0 if current has the requested access, error code otherwise + */ +static int smk_curacc_sem(struct sem_array *sma, int access) +{ + char *ssp = smack_of_sem(sma); + struct smk_audit_info ad; + +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC); + ad.a.u.ipc_id = sma->sem_perm.id; +#endif + return smk_curacc(ssp, access, &ad); +} + +/** * smack_sem_associate - Smack access check for sem * @sma: the object * @semflg: access requested @@ -1774,11 +1942,10 @@ static void smack_sem_free_security(struct sem_array *sma) */ static int smack_sem_associate(struct sem_array *sma, int semflg) { - char *ssp = smack_of_sem(sma); int may; may = smack_flags_to_may(semflg); - return smk_curacc(ssp, may); + return smk_curacc_sem(sma, may); } /** @@ -1790,7 +1957,6 @@ static int smack_sem_associate(struct sem_array *sma, int semflg) */ static int smack_sem_semctl(struct sem_array *sma, int cmd) { - char *ssp; int may; switch (cmd) { @@ -1819,8 +1985,7 @@ static int smack_sem_semctl(struct sem_array *sma, int cmd) return -EINVAL; } - ssp = smack_of_sem(sma); - return smk_curacc(ssp, may); + return smk_curacc_sem(sma, may); } /** @@ -1837,9 +2002,7 @@ static int smack_sem_semctl(struct sem_array *sma, int cmd) static int smack_sem_semop(struct sem_array *sma, struct sembuf *sops, unsigned nsops, int alter) { - char *ssp = smack_of_sem(sma); - - return smk_curacc(ssp, MAY_READWRITE); + return smk_curacc_sem(sma, MAY_READWRITE); } /** @@ -1881,6 +2044,25 @@ static char *smack_of_msq(struct msg_queue *msq) } /** + * smk_curacc_msq : helper to check if current has access on msq + * @msq : the msq + * @access : access requested + * + * return 0 if current has access, error otherwise + */ +static int smk_curacc_msq(struct msg_queue *msq, int access) +{ + char *msp = smack_of_msq(msq); + struct smk_audit_info ad; + +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC); + ad.a.u.ipc_id = msq->q_perm.id; +#endif + return smk_curacc(msp, access, &ad); +} + +/** * smack_msg_queue_associate - Smack access check for msg_queue * @msq: the object * @msqflg: access requested @@ -1889,11 +2071,10 @@ static char *smack_of_msq(struct msg_queue *msq) */ static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg) { - char *msp = smack_of_msq(msq); int may; may = smack_flags_to_may(msqflg); - return smk_curacc(msp, may); + return smk_curacc_msq(msq, may); } /** @@ -1905,7 +2086,6 @@ static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg) */ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd) { - char *msp; int may; switch (cmd) { @@ -1927,8 +2107,7 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd) return -EINVAL; } - msp = smack_of_msq(msq); - return smk_curacc(msp, may); + return smk_curacc_msq(msq, may); } /** @@ -1942,11 +2121,10 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd) static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg) { - char *msp = smack_of_msq(msq); - int rc; + int may; - rc = smack_flags_to_may(msqflg); - return smk_curacc(msp, rc); + may = smack_flags_to_may(msqflg); + return smk_curacc_msq(msq, may); } /** @@ -1962,9 +2140,7 @@ static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg, struct task_struct *target, long type, int mode) { - char *msp = smack_of_msq(msq); - - return smk_curacc(msp, MAY_READWRITE); + return smk_curacc_msq(msq, MAY_READWRITE); } /** @@ -1977,10 +2153,14 @@ static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg, static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag) { char *isp = ipp->security; - int may; + int may = smack_flags_to_may(flag); + struct smk_audit_info ad; - may = smack_flags_to_may(flag); - return smk_curacc(isp, may); +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC); + ad.a.u.ipc_id = ipp->id; +#endif + return smk_curacc(isp, may, &ad); } /** @@ -2239,8 +2419,12 @@ static int smack_unix_stream_connect(struct socket *sock, { struct inode *sp = SOCK_INODE(sock); struct inode *op = SOCK_INODE(other); + struct smk_audit_info ad; - return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_READWRITE); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET); + smk_ad_setfield_u_net_sk(&ad, other->sk); + return smk_access(smk_of_inode(sp), smk_of_inode(op), + MAY_READWRITE, &ad); } /** @@ -2255,8 +2439,11 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other) { struct inode *sp = SOCK_INODE(sock); struct inode *op = SOCK_INODE(other); + struct smk_audit_info ad; - return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_WRITE); + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET); + smk_ad_setfield_u_net_sk(&ad, other->sk); + return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_WRITE, &ad); } /** @@ -2371,7 +2558,7 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) char smack[SMK_LABELLEN]; char *csp; int rc; - + struct smk_audit_info ad; if (sk->sk_family != PF_INET && sk->sk_family != PF_INET6) return 0; @@ -2389,13 +2576,19 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb) netlbl_secattr_destroy(&secattr); +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET); + ad.a.u.net.family = sk->sk_family; + ad.a.u.net.netif = skb->iif; + ipv4_skb_to_auditdata(skb, &ad.a, NULL); +#endif /* * Receiving a packet requires that the other end * be able to write here. Read access is not required. * This is the simplist possible security model * for networking. */ - rc = smk_access(csp, ssp->smk_in, MAY_WRITE); + rc = smk_access(csp, ssp->smk_in, MAY_WRITE, &ad); if (rc != 0) netlbl_skbuff_err(skb, rc, 0); return rc; @@ -2524,6 +2717,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb, struct iphdr *hdr; char smack[SMK_LABELLEN]; int rc; + struct smk_audit_info ad; /* handle mapped IPv4 packets arriving via IPv6 sockets */ if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP)) @@ -2537,11 +2731,17 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb, strncpy(smack, smack_known_huh.smk_known, SMK_MAXLEN); netlbl_secattr_destroy(&secattr); +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET); + ad.a.u.net.family = family; + ad.a.u.net.netif = skb->iif; + ipv4_skb_to_auditdata(skb, &ad.a, NULL); +#endif /* * Receiving a packet requires that the other end be able to write * here. Read access is not required. */ - rc = smk_access(smack, ssp->smk_in, MAY_WRITE); + rc = smk_access(smack, ssp->smk_in, MAY_WRITE, &ad); if (rc != 0) return rc; @@ -2643,6 +2843,7 @@ static int smack_key_permission(key_ref_t key_ref, const struct cred *cred, key_perm_t perm) { struct key *keyp; + struct smk_audit_info ad; keyp = key_ref_to_ptr(key_ref); if (keyp == NULL) @@ -2658,8 +2859,13 @@ static int smack_key_permission(key_ref_t key_ref, */ if (cred->security == NULL) return -EACCES; - - return smk_access(cred->security, keyp->security, MAY_READWRITE); +#ifdef CONFIG_AUDIT + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_KEY); + ad.a.u.key_struct.key = keyp->serial; + ad.a.u.key_struct.key_desc = keyp->description; +#endif + return smk_access(cred->security, keyp->security, + MAY_READWRITE, &ad); } #endif /* CONFIG_KEYS */ |