diff options
Diffstat (limited to 'ipc/util.c')
| -rw-r--r-- | ipc/util.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/ipc/util.c b/ipc/util.c index eb07fd356f27..72fd0785ac94 100644 --- a/ipc/util.c +++ b/ipc/util.c @@ -249,8 +249,8 @@ int ipc_get_maxid(struct ipc_ids *ids) int ipc_addid(struct ipc_ids* ids, struct kern_ipc_perm* new, int size) { - uid_t euid; - gid_t egid; + kuid_t euid; + kgid_t egid; int id, err; if (size > IPCMNI) @@ -606,14 +606,14 @@ void ipc_rcu_putref(void *ptr) int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flag) { - uid_t euid = current_euid(); + kuid_t euid = current_euid(); int requested_mode, granted_mode; audit_ipc_obj(ipcp); requested_mode = (flag >> 6) | (flag >> 3) | flag; granted_mode = ipcp->mode; - if (euid == ipcp->cuid || - euid == ipcp->uid) + if (uid_eq(euid, ipcp->cuid) || + uid_eq(euid, ipcp->uid)) granted_mode >>= 6; else if (in_group_p(ipcp->cgid) || in_group_p(ipcp->gid)) granted_mode >>= 3; @@ -643,10 +643,10 @@ int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flag) void kernel_to_ipc64_perm (struct kern_ipc_perm *in, struct ipc64_perm *out) { out->key = in->key; - out->uid = in->uid; - out->gid = in->gid; - out->cuid = in->cuid; - out->cgid = in->cgid; + out->uid = from_kuid_munged(current_user_ns(), in->uid); + out->gid = from_kgid_munged(current_user_ns(), in->gid); + out->cuid = from_kuid_munged(current_user_ns(), in->cuid); + out->cgid = from_kgid_munged(current_user_ns(), in->cgid); out->mode = in->mode; out->seq = in->seq; } @@ -747,12 +747,19 @@ int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids, * @in: the permission given as input. * @out: the permission of the ipc to set. */ -void ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) +int ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out) { - out->uid = in->uid; - out->gid = in->gid; + kuid_t uid = make_kuid(current_user_ns(), in->uid); + kgid_t gid = make_kgid(current_user_ns(), in->gid); + if (!uid_valid(uid) || !gid_valid(gid)) + return -EINVAL; + + out->uid = uid; + out->gid = gid; out->mode = (out->mode & ~S_IRWXUGO) | (in->mode & S_IRWXUGO); + + return 0; } /** @@ -777,7 +784,7 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns, struct ipc64_perm *perm, int extra_perm) { struct kern_ipc_perm *ipcp; - uid_t euid; + kuid_t euid; int err; down_write(&ids->rw_mutex); @@ -793,7 +800,7 @@ struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns, perm->gid, perm->mode); euid = current_euid(); - if (euid == ipcp->cuid || euid == ipcp->uid || + if (uid_eq(euid, ipcp->cuid) || uid_eq(euid, ipcp->uid) || ns_capable(ns->user_ns, CAP_SYS_ADMIN)) return ipcp; |