Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / kernel / uid16.c

diff --git a/kernel/uid16.c b/kernel/uid16.c
index f669941..187e2a4 100644 (file)
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -10,6 +10,7 @@
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/prctl.h>
+#include <linux/capability.h>
 #include <linux/init.h>
 #include <linux/highuid.h>
 #include <linux/security.h>
@@ -19,43 +20,67 @@
 
 asmlinkage long sys_chown16(const char __user * filename, old_uid_t user, old_gid_t group)
 {
-       return sys_chown(filename, low2highuid(user), low2highgid(group));
+       long ret = sys_chown(filename, low2highuid(user), low2highgid(group));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_lchown16(const char __user * filename, old_uid_t user, old_gid_t group)
 {
-       return sys_lchown(filename, low2highuid(user), low2highgid(group));
+       long ret = sys_lchown(filename, low2highuid(user), low2highgid(group));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_fchown16(unsigned int fd, old_uid_t user, old_gid_t group)
 {
-       return sys_fchown(fd, low2highuid(user), low2highgid(group));
+       long ret = sys_fchown(fd, low2highuid(user), low2highgid(group));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setregid16(old_gid_t rgid, old_gid_t egid)
 {
-       return sys_setregid(low2highgid(rgid), low2highgid(egid));
+       long ret = sys_setregid(low2highgid(rgid), low2highgid(egid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setgid16(old_gid_t gid)
 {
-       return sys_setgid(low2highgid(gid));
+       long ret = sys_setgid(low2highgid(gid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setreuid16(old_uid_t ruid, old_uid_t euid)
 {
-       return sys_setreuid(low2highuid(ruid), low2highuid(euid));
+       long ret = sys_setreuid(low2highuid(ruid), low2highuid(euid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setuid16(old_uid_t uid)
 {
-       return sys_setuid(low2highuid(uid));
+       long ret = sys_setuid(low2highuid(uid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setresuid16(old_uid_t ruid, old_uid_t euid, old_uid_t suid)
 {
-       return sys_setresuid(low2highuid(ruid), low2highuid(euid),
-               low2highuid(suid));
+       long ret = sys_setresuid(low2highuid(ruid), low2highuid(euid),
+                                low2highuid(suid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid, old_uid_t __user *suid)
@@ -71,8 +96,11 @@ asmlinkage long sys_getresuid16(old_uid_t __user *ruid, old_uid_t __user *euid,
 
 asmlinkage long sys_setresgid16(old_gid_t rgid, old_gid_t egid, old_gid_t sgid)
 {
-       return sys_setresgid(low2highgid(rgid), low2highgid(egid),
-               low2highgid(sgid));
+       long ret = sys_setresgid(low2highgid(rgid), low2highgid(egid),
+                                low2highgid(sgid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid, old_gid_t __user *sgid)
@@ -88,12 +116,18 @@ asmlinkage long sys_getresgid16(old_gid_t __user *rgid, old_gid_t __user *egid,
 
 asmlinkage long sys_setfsuid16(old_uid_t uid)
 {
-       return sys_setfsuid(low2highuid(uid));
+       long ret = sys_setfsuid(low2highuid(uid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 asmlinkage long sys_setfsgid16(old_gid_t gid)
 {
-       return sys_setfsgid(low2highgid(gid));
+       long ret = sys_setfsgid(low2highgid(gid));
+       /* avoid REGPARM breakage on x86: */
+       prevent_tail_call(ret);
+       return ret;
 }
 
 static int groups16_to_user(old_gid_t __user *grouplist,