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Diffstat (limited to 'net/compat.c')
-rw-r--r--net/compat.c67
1 files changed, 37 insertions, 30 deletions
diff --git a/net/compat.c b/net/compat.c
index 1b96281892d..bc8aeefddf3 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -71,6 +71,8 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
__get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
__get_user(kmsg->msg_flags, &umsg->msg_flags))
return -EFAULT;
+ if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
+ kmsg->msg_namelen = sizeof(struct sockaddr_storage);
kmsg->msg_name = compat_ptr(tmp1);
kmsg->msg_iov = compat_ptr(tmp2);
kmsg->msg_control = compat_ptr(tmp3);
@@ -83,7 +85,7 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
{
int tot_len;
- if (kern_msg->msg_namelen) {
+ if (kern_msg->msg_name && kern_msg->msg_namelen) {
if (mode == VERIFY_READ) {
int err = move_addr_to_kernel(kern_msg->msg_name,
kern_msg->msg_namelen,
@@ -92,8 +94,10 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
return err;
}
kern_msg->msg_name = kern_address;
- } else
+ } else {
kern_msg->msg_name = NULL;
+ kern_msg->msg_namelen = 0;
+ }
tot_len = iov_from_user_compat_to_kern(kern_iov,
(struct compat_iovec __user *)kern_msg->msg_iov,
@@ -221,6 +225,8 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
{
struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
struct compat_cmsghdr cmhdr;
+ struct compat_timeval ctv;
+ struct compat_timespec cts[3];
int cmlen;
if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
@@ -229,8 +235,6 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat
}
if (!COMPAT_USE_64BIT_TIME) {
- struct compat_timeval ctv;
- struct compat_timespec cts[3];
if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
struct timeval *tv = (struct timeval *)data;
ctv.tv_sec = tv->tv_sec;
@@ -301,8 +305,7 @@ void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
break;
}
/* Bump the usage count and install the file. */
- get_file(fp[i]);
- fd_install(new_fd, fp[i]);
+ fd_install(new_fd, get_file(fp[i]));
}
if (i > 0) {
@@ -382,8 +385,8 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
return sock_setsockopt(sock, level, optname, optval, optlen);
}
-asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
- char __user *optval, unsigned int optlen)
+COMPAT_SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
+ char __user *, optval, unsigned int, optlen)
{
int err;
struct socket *sock = sockfd_lookup(fd, &err);
@@ -502,8 +505,8 @@ int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *usersta
}
EXPORT_SYMBOL(compat_sock_get_timestampns);
-asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
- char __user *optval, int __user *optlen)
+COMPAT_SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
+ char __user *, optval, int __user *, optlen)
{
int err;
struct socket *sock = sockfd_lookup(fd, &err);
@@ -733,63 +736,67 @@ static unsigned char nas[21] = {
};
#undef AL
-asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
+COMPAT_SYSCALL_DEFINE3(sendmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
{
- return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
+ if (flags & MSG_CMSG_COMPAT)
+ return -EINVAL;
+ return __sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}
-asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
- unsigned int vlen, unsigned int flags)
+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);
}
-asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
+COMPAT_SYSCALL_DEFINE3(recvmsg, int, fd, struct compat_msghdr __user *, msg, unsigned int, flags)
{
- return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
+ if (flags & MSG_CMSG_COMPAT)
+ return -EINVAL;
+ return __sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}
-asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags)
+COMPAT_SYSCALL_DEFINE4(recv, int, fd, void __user *, buf, compat_size_t, len, unsigned int, flags)
{
return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
}
-asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
- unsigned int flags, struct sockaddr __user *addr,
- int __user *addrlen)
+COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len,
+ unsigned int, flags, struct sockaddr __user *, addr,
+ int __user *, addrlen)
{
return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
}
-asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
- unsigned int vlen, unsigned int flags,
- struct compat_timespec __user *timeout)
+COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
+ unsigned int, vlen, unsigned int, flags,
+ struct compat_timespec __user *, timeout)
{
int datagrams;
struct timespec ktspec;
- if (COMPAT_USE_64BIT_TIME)
- return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
- flags | MSG_CMSG_COMPAT,
- (struct timespec *) timeout);
+ if (flags & MSG_CMSG_COMPAT)
+ return -EINVAL;
if (timeout == NULL)
return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, NULL);
- if (get_compat_timespec(&ktspec, timeout))
+ if (compat_get_timespec(&ktspec, timeout))
return -EFAULT;
datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, &ktspec);
- if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
+ if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
datagrams = -EFAULT;
return datagrams;
}
-asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
+COMPAT_SYSCALL_DEFINE2(socketcall, int, call, u32 __user *, args)
{
int ret;
u32 a[6];
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 15:14:47 +0000