diff options
Diffstat (limited to 'ipc/util.c')
| -rw-r--r-- | ipc/util.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/ipc/util.c b/ipc/util.c index 69a0cc13d96..5c0d28921ba 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -317,6 +317,7 @@ retry: /** * ipc_check_perms - check security and permissions for an IPC + * @ns: IPC namespace * @ipcp: ipc permission set * @ops: the actual security routine to call * @params: its parameters @@ -329,12 +330,14 @@ retry: * * It is called with ipc_ids.rw_mutex and ipcp->lock held. */ -static int ipc_check_perms(struct kern_ipc_perm *ipcp, struct ipc_ops *ops, - struct ipc_params *params) +static int ipc_check_perms(struct ipc_namespace *ns, + struct kern_ipc_perm *ipcp, + struct ipc_ops *ops, + struct ipc_params *params) { int err; - if (ipcperms(ipcp, params->flg)) + if (ipcperms(ns, ipcp, params->flg)) err = -EACCES; else { err = ops->associate(ipcp, params->flg); @@ -396,7 +399,7 @@ retry: * ipc_check_perms returns the IPC id on * success */ - err = ipc_check_perms(ipcp, ops, params); + err = ipc_check_perms(ns, ipcp, ops, params); } ipc_unlock(ipcp); } @@ -605,15 +608,18 @@ void ipc_rcu_putref(void *ptr) /** * ipcperms - check IPC permissions + * @ns: IPC namespace * @ipcp: IPC permission set * @flag: desired permission set. * * Check user, group, other permissions for access * to ipc resources. return 0 if allowed + * + * @flag will most probably be 0 or S_...UGO from <linux/stat.h> */ -int ipcperms (struct kern_ipc_perm *ipcp, short flag) -{ /* flag will most probably be 0 or S_...UGO from <linux/stat.h> */ +int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flag) +{ uid_t euid = current_euid(); int requested_mode, granted_mode; @@ -627,7 +633,7 @@ int ipcperms (struct kern_ipc_perm *ipcp, short flag) granted_mode >>= 3; /* is there some bit set in requested_mode but not in granted_mode? */ if ((requested_mode & ~granted_mode & 0007) && - !capable(CAP_IPC_OWNER)) + !ns_capable(ns->user_ns, CAP_IPC_OWNER)) return -1; return security_ipc_permission(ipcp, flag); @@ -765,6 +771,7 @@ void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) /** * ipcctl_pre_down - retrieve an ipc and check permissions for some IPC_XXX cmd + * @ns: the ipc namespace * @ids: the table of ids where to look for the ipc * @id: the id of the ipc to retrieve * @cmd: the cmd to check @@ -779,7 +786,8 @@ void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) * - returns the ipc with both ipc and rw_mutex locks held in case of success * or an err-code without any lock held otherwise. */ -struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd, +struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns, + struct ipc_ids *ids, int id, int cmd, struct ipc64_perm *perm, int extra_perm) { struct kern_ipc_perm *ipcp; @@ -799,8 +807,8 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_ids *ids, int id, int cmd, perm->gid, perm->mode); euid = current_euid(); - if (euid == ipcp->cuid || - euid == ipcp->uid || capable(CAP_SYS_ADMIN)) + if (euid == ipcp->cuid || euid == ipcp->uid || + ns_capable(ns->user_ns, CAP_SYS_ADMIN)) return ipcp; err = -EPERM; |