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-rw-r--r--ipc/compat.c132
-rw-r--r--ipc/msg.c133
2 files changed, 133 insertions, 132 deletions
diff --git a/ipc/compat.c b/ipc/compat.c
index fbfd6fb0a68d..c83099a3b265 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -50,22 +50,6 @@ struct compat_semid_ds {
unsigned short sem_nsems;
};
-struct compat_msqid_ds {
- struct compat_ipc_perm msg_perm;
- compat_uptr_t msg_first;
- compat_uptr_t msg_last;
- compat_time_t msg_stime;
- compat_time_t msg_rtime;
- compat_time_t msg_ctime;
- compat_ulong_t msg_lcbytes;
- compat_ulong_t msg_lqbytes;
- unsigned short msg_cbytes;
- unsigned short msg_qnum;
- unsigned short msg_qbytes;
- compat_ipc_pid_t msg_lspid;
- compat_ipc_pid_t msg_lrpid;
-};
-
struct compat_ipc_kludge {
compat_uptr_t msgp;
compat_long_t msgtyp;
@@ -391,122 +375,6 @@ COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
msgflg, compat_do_msg_fill);
}
-static inline int get_compat_msqid64(struct msqid64_ds *m64,
- struct compat_msqid64_ds __user *up64)
-{
- int err;
-
- if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
- return -EFAULT;
- err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
- err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
- return err;
-}
-
-static inline int get_compat_msqid(struct msqid64_ds *m,
- struct compat_msqid_ds __user *up)
-{
- int err;
-
- if (!access_ok(VERIFY_READ, up, sizeof(*up)))
- return -EFAULT;
- err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
- err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
- return err;
-}
-
-static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
- struct compat_msqid64_ds __user *up64)
-{
- int err;
-
- if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
- return -EFAULT;
- err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
- err |= __put_user(m64->msg_stime, &up64->msg_stime);
- err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
- err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
- err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
- err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
- err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
- err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
- err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
- return err;
-}
-
-static inline int put_compat_msqid_ds(struct msqid64_ds *m,
- struct compat_msqid_ds __user *up)
-{
- int err;
-
- if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
- return -EFAULT;
- err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
- err |= __put_user(m->msg_stime, &up->msg_stime);
- err |= __put_user(m->msg_rtime, &up->msg_rtime);
- err |= __put_user(m->msg_ctime, &up->msg_ctime);
- err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
- err |= __put_user(m->msg_qnum, &up->msg_qnum);
- err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
- err |= __put_user(m->msg_lspid, &up->msg_lspid);
- err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
- return err;
-}
-
-COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
-{
- int err, err2;
- struct msqid64_ds m64;
- int version = __compat_ipc_parse_version(&second);
- void __user *p;
-
- memset(&m64, 0, sizeof(m64));
-
- switch (second & (~IPC_64)) {
- case IPC_INFO:
- case IPC_RMID:
- case MSG_INFO:
- err = sys_msgctl(first, second, uptr);
- break;
-
- case IPC_SET:
- if (version == IPC_64)
- err = get_compat_msqid64(&m64, uptr);
- else
- err = get_compat_msqid(&m64, uptr);
-
- if (err)
- break;
- p = compat_alloc_user_space(sizeof(m64));
- if (copy_to_user(p, &m64, sizeof(m64)))
- err = -EFAULT;
- else
- err = sys_msgctl(first, second, p);
- break;
-
- case IPC_STAT:
- case MSG_STAT:
- p = compat_alloc_user_space(sizeof(m64));
- err = sys_msgctl(first, second, p);
- if (err < 0)
- break;
- if (copy_from_user(&m64, p, sizeof(m64)))
- err2 = -EFAULT;
- else if (version == IPC_64)
- err2 = put_compat_msqid64_ds(&m64, uptr);
- else
- err2 = put_compat_msqid_ds(&m64, uptr);
- if (err2)
- err = -EFAULT;
- break;
-
- default:
- err = -EINVAL;
- break;
- }
- return err;
-}
-
COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
{
unsigned long ret;
diff --git a/ipc/msg.c b/ipc/msg.c
index 322e7bf8b8d1..3400012e1ce8 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -567,6 +567,139 @@ SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf)
}
}
+#ifdef CONFIG_COMPAT
+
+struct compat_msqid_ds {
+ struct compat_ipc_perm msg_perm;
+ compat_uptr_t msg_first;
+ compat_uptr_t msg_last;
+ compat_time_t msg_stime;
+ compat_time_t msg_rtime;
+ compat_time_t msg_ctime;
+ compat_ulong_t msg_lcbytes;
+ compat_ulong_t msg_lqbytes;
+ unsigned short msg_cbytes;
+ unsigned short msg_qnum;
+ unsigned short msg_qbytes;
+ compat_ipc_pid_t msg_lspid;
+ compat_ipc_pid_t msg_lrpid;
+};
+
+static int copy_compat_msqid_from_user(struct msqid64_ds *out, void __user *buf,
+ int version)
+{
+ memset(out, 0, sizeof(*out));
+ if (version == IPC_64) {
+ struct compat_msqid64_ds *p = buf;
+ struct compat_ipc64_perm v;
+ if (copy_from_user(&v, &p->msg_perm, sizeof(v)))
+ return -EFAULT;
+ out->msg_perm.uid = v.uid;
+ out->msg_perm.gid = v.gid;
+ out->msg_perm.mode = v.mode;
+ if (get_user(out->msg_qbytes, &p->msg_qbytes))
+ return -EFAULT;
+ } else {
+ struct compat_msqid_ds *p = buf;
+ struct compat_ipc_perm v;
+ if (copy_from_user(&v, &p->msg_perm, sizeof(v)))
+ return -EFAULT;
+ out->msg_perm.uid = v.uid;
+ out->msg_perm.gid = v.gid;
+ out->msg_perm.mode = v.mode;
+ if (get_user(out->msg_qbytes, &p->msg_qbytes))
+ return -EFAULT;
+ }
+ return 0;
+}
+
+static int copy_compat_msqid_to_user(void __user *buf, struct msqid64_ds *in,
+ int version)
+{
+ if (version == IPC_64) {
+ struct compat_msqid64_ds v;
+ memset(&v, 0, sizeof(v));
+ v.msg_perm.key = in->msg_perm.key;
+ v.msg_perm.uid = in->msg_perm.uid;
+ v.msg_perm.gid = in->msg_perm.gid;
+ v.msg_perm.cuid = in->msg_perm.cuid;
+ v.msg_perm.cgid = in->msg_perm.cgid;
+ v.msg_perm.mode = in->msg_perm.mode;
+ v.msg_perm.seq = in->msg_perm.seq;
+ v.msg_stime = in->msg_stime;
+ v.msg_rtime = in->msg_rtime;
+ v.msg_ctime = in->msg_ctime;
+ v.msg_cbytes = in->msg_cbytes;
+ v.msg_qnum = in->msg_qnum;
+ v.msg_qbytes = in->msg_qbytes;
+ v.msg_lspid = in->msg_lspid;
+ v.msg_lrpid = in->msg_lrpid;
+ return copy_to_user(buf, &v, sizeof(v));
+ } else {
+ struct compat_msqid_ds v;
+ memset(&v, 0, sizeof(v));
+ v.msg_perm.key = in->msg_perm.key;
+ SET_UID(v.msg_perm.uid, in->msg_perm.uid);
+ SET_GID(v.msg_perm.gid, in->msg_perm.gid);
+ SET_UID(v.msg_perm.cuid, in->msg_perm.cuid);
+ SET_GID(v.msg_perm.cgid, in->msg_perm.cgid);
+ v.msg_perm.mode = in->msg_perm.mode;
+ v.msg_perm.seq = in->msg_perm.seq;
+ v.msg_stime = in->msg_stime;
+ v.msg_rtime = in->msg_rtime;
+ v.msg_ctime = in->msg_ctime;
+ v.msg_cbytes = in->msg_cbytes;
+ v.msg_qnum = in->msg_qnum;
+ v.msg_qbytes = in->msg_qbytes;
+ v.msg_lspid = in->msg_lspid;
+ v.msg_lrpid = in->msg_lrpid;
+ return copy_to_user(buf, &v, sizeof(v));
+ }
+}
+
+COMPAT_SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, void __user *, uptr)
+{
+ struct ipc_namespace *ns;
+ int err;
+ struct msqid64_ds msqid64;
+ int version = compat_ipc_parse_version(&cmd);
+
+ ns = current->nsproxy->ipc_ns;
+
+ if (msqid < 0 || cmd < 0)
+ return -EINVAL;
+
+ switch (cmd & (~IPC_64)) {
+ case IPC_INFO:
+ case MSG_INFO: {
+ struct msginfo msginfo;
+ err = msgctl_info(ns, msqid, cmd, &msginfo);
+ if (err < 0)
+ return err;
+ if (copy_to_user(uptr, &msginfo, sizeof(struct msginfo)))
+ err = -EFAULT;
+ return err;
+ }
+ case IPC_STAT:
+ case MSG_STAT:
+ err = msgctl_stat(ns, msqid, cmd, &msqid64);
+ if (err < 0)
+ return err;
+ if (copy_compat_msqid_to_user(uptr, &msqid64, version))
+ err = -EFAULT;
+ return err;
+ case IPC_SET:
+ if (copy_compat_msqid_from_user(&msqid64, uptr, version))
+ return -EFAULT;
+ /* fallthru */
+ case IPC_RMID:
+ return msgctl_down(ns, msqid, cmd, &msqid64);
+ default:
+ return -EINVAL;
+ }
+}
+#endif
+
static int testmsg(struct msg_msg *msg, long type, int mode)
{
switch (mode) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 09:12:24 +0000