Importing "grsecurity-3.1-3.19.2-201503201903.patch"

[people/ms/linux.git] / net / compat.c

diff --git a/net/compat.c b/net/compat.c
index 3236b4167a32109b91b1eb28ae8bdf522c8db3f5..2bd2649dd8081a39b7975d7dd6a15a30b60a17da 100644 (file)
--- a/net/compat.c
+++ b/net/compat.c
@@ -93,20 +93,20 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg,
 
 #define CMSG_COMPAT_FIRSTHDR(msg)                      \
        (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ?     \
-        (struct compat_cmsghdr __user *)((msg)->msg_control) :         \
+        (struct compat_cmsghdr __force_user *)((msg)->msg_control) :           \
         (struct compat_cmsghdr __user *)NULL)
 
 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
        ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
         (ucmlen) <= (unsigned long) \
         ((mhdr)->msg_controllen - \
-         ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
+         ((char __force_kernel *)(ucmsg) - (char *)(mhdr)->msg_control)))
 
 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
                struct compat_cmsghdr __user *cmsg, int cmsg_len)
 {
        char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
-       if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
+       if ((unsigned long)(ptr + 1 - (char __force_user *)msg->msg_control) >
                        msg->msg_controllen)
                return NULL;
        return (struct compat_cmsghdr __user *)ptr;
@@ -196,7 +196,7 @@ Efault:
 
 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
 {
-       struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
+       struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __force_user *) kmsg->msg_control;
        struct compat_cmsghdr cmhdr;
        struct compat_timeval ctv;
        struct compat_timespec cts[3];
@@ -252,7 +252,7 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
 
 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
 {
-       struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
+       struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __force_user *) kmsg->msg_control;
        int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
        int fdnum = scm->fp->count;
        struct file **fp = scm->fp->fp;
@@ -340,7 +340,7 @@ static int do_set_sock_timeout(struct socket *sock, int level,
                return -EFAULT;
        old_fs = get_fs();
        set_fs(KERNEL_DS);
-       err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
+       err = sock_setsockopt(sock, level, optname, (char __force_user *)&ktime, sizeof(ktime));
        set_fs(old_fs);
 
        return err;
@@ -401,7 +401,7 @@ static int do_get_sock_timeout(struct socket *sock, int level, int optname,
        len = sizeof(ktime);
        old_fs = get_fs();
        set_fs(KERNEL_DS);
-       err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
+       err = sock_getsockopt(sock, level, optname, (char __force_user *) &ktime, (int __force_user *)&len);
        set_fs(old_fs);
 
        if (!err) {
@@ -544,7 +544,7 @@ int compat_mc_setsockopt(struct sock *sock, int level, int optname,
        case MCAST_JOIN_GROUP:
        case MCAST_LEAVE_GROUP:
        {
-               struct compat_group_req __user *gr32 = (void *)optval;
+               struct compat_group_req __user *gr32 = (void __user *)optval;
                struct group_req __user *kgr =
                        compat_alloc_user_space(sizeof(struct group_req));
                u32 interface;
@@ -565,7 +565,7 @@ int compat_mc_setsockopt(struct sock *sock, int level, int optname,
        case MCAST_BLOCK_SOURCE:
        case MCAST_UNBLOCK_SOURCE:
        {
-               struct compat_group_source_req __user *gsr32 = (void *)optval;
+               struct compat_group_source_req __user *gsr32 = (void __user *)optval;
                struct group_source_req __user *kgsr = compat_alloc_user_space(
                        sizeof(struct group_source_req));
                u32 interface;
@@ -586,7 +586,7 @@ int compat_mc_setsockopt(struct sock *sock, int level, int optname,
        }
        case MCAST_MSFILTER:
        {
-               struct compat_group_filter __user *gf32 = (void *)optval;
+               struct compat_group_filter __user *gf32 = (void __user *)optval;
                struct group_filter __user *kgf;
                u32 interface, fmode, numsrc;
 
@@ -624,7 +624,7 @@ int compat_mc_getsockopt(struct sock *sock, int level, int optname,
        char __user *optval, int __user *optlen,
        int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
 {
-       struct compat_group_filter __user *gf32 = (void *)optval;
+       struct compat_group_filter __user *gf32 = (void __user *)optval;
        struct group_filter __user *kgf;
        int __user      *koptlen;
        u32 interface, fmode, numsrc;
@@ -711,24 +711,18 @@ static unsigned char nas[21] = {
 
 COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_sendmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
 COMPAT_SYSCALL_DEFINE4(sendmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
                       unsigned int, vlen, unsigned int, flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                              flags | MSG_CMSG_COMPAT);
 }
 
 COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
 {
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
        return __sys_recvmsg(fd, (struct user_msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
 }
 
@@ -751,9 +745,6 @@ COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
        int datagrams;
        struct timespec ktspec;
 
-       if (flags & MSG_CMSG_COMPAT)
-               return -EINVAL;
-
        if (timeout == NULL)
                return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                                      flags | MSG_CMSG_COMPAT, NULL);
@@ -777,7 +768,7 @@ COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
 
        if (call < SYS_SOCKET || call > SYS_SENDMMSG)
                return -EINVAL;
-       if (copy_from_user(a, args, nas[call]))
+       if (nas[call] > sizeof a || copy_from_user(a, args, nas[call]))
                return -EFAULT;
        a0 = a[0];
        a1 = a[1];