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-rw-r--r--kernel/uid16.c59
1 files changed, 46 insertions, 13 deletions
diff --git a/kernel/uid16.c b/kernel/uid16.c
index aa25605027c..187e2a42387 100644
--- a/kernel/uid16.c
+++ b/kernel/uid16.c
@@ -20,43 +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)
@@ -72,8 +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)
@@ -89,12 +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,