From fb8621bb6c040a25ac2fc246653859f841a1f53d Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 7 Sep 2010 03:55:00 +0000 Subject: net: remove address space warnings in net/socket.c Casts __kernel to __user pointer require __force markup, so add it. Also sock_get/setsockopt() takes @optval and/or @optlen arguments as user pointers but were taking kernel pointers, use new variables 'uoptval' and/or 'uoptlen' to fix it. These remove following warnings from sparse: net/socket.c:1922:46: warning: cast adds address space to expression () net/socket.c:3061:61: warning: incorrect type in argument 4 (different address spaces) net/socket.c:3061:61: expected char [noderef] *optval net/socket.c:3061:61: got char *optval net/socket.c:3061:69: warning: incorrect type in argument 5 (different address spaces) net/socket.c:3061:69: expected int [noderef] *optlen net/socket.c:3061:69: got int *optlen net/socket.c:3063:67: warning: incorrect type in argument 4 (different address spaces) net/socket.c:3063:67: expected char [noderef] *optval net/socket.c:3063:67: got char *optval net/socket.c:3064:45: warning: incorrect type in argument 5 (different address spaces) net/socket.c:3064:45: expected int [noderef] *optlen net/socket.c:3064:45: got int *optlen net/socket.c:3078:61: warning: incorrect type in argument 4 (different address spaces) net/socket.c:3078:61: expected char [noderef] *optval net/socket.c:3078:61: got char *optval net/socket.c:3080:67: warning: incorrect type in argument 4 (different address spaces) net/socket.c:3080:67: expected char [noderef] *optval net/socket.c:3080:67: got char *optval Signed-off-by: Namhyung Kim Signed-off-by: David S. Miller --- net/socket.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) (limited to 'net/socket.c') diff --git a/net/socket.c b/net/socket.c index 7848d12f5e4d..717a5f1c8792 100644 --- a/net/socket.c +++ b/net/socket.c @@ -1918,7 +1918,8 @@ SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) * Afterwards, it will be a kernel pointer. Thus the compiler-assisted * checking falls down on this. */ - if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, + if (copy_from_user(ctl_buf, + (void __user __force *)msg_sys.msg_control, ctl_len)) goto out_freectl; msg_sys.msg_control = ctl_buf; @@ -3053,14 +3054,19 @@ int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { mm_segment_t oldfs = get_fs(); + char __user *uoptval; + int __user *uoptlen; int err; + uoptval = (char __user __force *) optval; + uoptlen = (int __user __force *) optlen; + set_fs(KERNEL_DS); if (level == SOL_SOCKET) - err = sock_getsockopt(sock, level, optname, optval, optlen); + err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); else - err = sock->ops->getsockopt(sock, level, optname, optval, - optlen); + err = sock->ops->getsockopt(sock, level, optname, uoptval, + uoptlen); set_fs(oldfs); return err; } @@ -3070,13 +3076,16 @@ int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval, unsigned int optlen) { mm_segment_t oldfs = get_fs(); + char __user *uoptval; int err; + uoptval = (char __user __force *) optval; + set_fs(KERNEL_DS); if (level == SOL_SOCKET) - err = sock_setsockopt(sock, level, optname, optval, optlen); + err = sock_setsockopt(sock, level, optname, uoptval, optlen); else - err = sock->ops->setsockopt(sock, level, optname, optval, + err = sock->ops->setsockopt(sock, level, optname, uoptval, optlen); set_fs(oldfs); return err; -- cgit v1.2.2