tcp: Restore ordering of TCP options for the sake of inter-operability

[pandora-kernel.git] / net / core / scm.c

diff --git a/net/core/scm.c b/net/core/scm.c
index 292ad8d..10f5c65 100644 (file)
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -24,6 +24,8 @@
 #include <linux/interrupt.h>
 #include <linux/netdevice.h>
 #include <linux/security.h>
+#include <linux/pid.h>
+#include <linux/nsproxy.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -42,7 +44,7 @@
 
 static __inline__ int scm_check_creds(struct ucred *creds)
 {
-       if ((creds->pid == current->tgid || capable(CAP_SYS_ADMIN)) &&
+       if ((creds->pid == task_tgid_vnr(current) || capable(CAP_SYS_ADMIN)) &&
            ((creds->uid == current->uid || creds->uid == current->euid ||
              creds->uid == current->suid) || capable(CAP_SETUID)) &&
            ((creds->gid == current->gid || creds->gid == current->egid ||
@@ -167,7 +169,8 @@ error:
 
 int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)
 {
-       struct cmsghdr __user *cm = (struct cmsghdr __user *)msg->msg_control;
+       struct cmsghdr __user *cm
+               = (__force struct cmsghdr __user *)msg->msg_control;
        struct cmsghdr cmhdr;
        int cmlen = CMSG_LEN(len);
        int err;
@@ -193,6 +196,8 @@ int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)
        if (copy_to_user(CMSG_DATA(cm), data, cmlen - sizeof(struct cmsghdr)))
                goto out;
        cmlen = CMSG_SPACE(len);
+       if (msg->msg_controllen < cmlen)
+               cmlen = msg->msg_controllen;
        msg->msg_control += cmlen;
        msg->msg_controllen -= cmlen;
        err = 0;
@@ -202,7 +207,8 @@ out:
 
 void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
 {
-       struct cmsghdr __user *cm = (struct cmsghdr __user*)msg->msg_control;
+       struct cmsghdr __user *cm
+               = (__force struct cmsghdr __user*)msg->msg_control;
 
        int fdmax = 0;
        int fdnum = scm->fp->count;
@@ -222,13 +228,15 @@ void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
        if (fdnum < fdmax)
                fdmax = fdnum;
 
-       for (i=0, cmfptr=(int __user *)CMSG_DATA(cm); i<fdmax; i++, cmfptr++)
+       for (i=0, cmfptr=(__force int __user *)CMSG_DATA(cm); i<fdmax;
+            i++, cmfptr++)
        {
                int new_fd;
                err = security_file_receive(fp[i]);
                if (err)
                        break;
-               err = get_unused_fd();
+               err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & msg->msg_flags
+                                         ? O_CLOEXEC : 0);
                if (err < 0)
                        break;
                new_fd = err;