提交 b9c54f91 编写于 作者: A Andy Walker 提交者: David S. Miller

[SPARC]: Fix regression in sys_getdomainname()

This patch corrects the buffer length checking in the
sys_getdomainname() implementation for sparc/sparc64.
Signed-off-by: NAndy Walker <andy@puszczka.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 b9b64e6e
......@@ -470,19 +470,21 @@ asmlinkage int sys_getdomainname(char __user *name, int len)
{
int nlen, err;
if (len < 0 || len > __NEW_UTS_LEN)
if (len < 0)
return -EINVAL;
down_read(&uts_sem);
nlen = strlen(system_utsname.domainname) + 1;
if (nlen < len)
len = nlen;
err = -EINVAL;
if (nlen > len)
goto out;
err = -EFAULT;
if (!copy_to_user(name, system_utsname.domainname, len))
if (!copy_to_user(name, system_utsname.domainname, nlen))
err = 0;
out:
up_read(&uts_sem);
return err;
}
......@@ -707,19 +707,21 @@ asmlinkage long sys_getdomainname(char __user *name, int len)
{
int nlen, err;
if (len < 0 || len > __NEW_UTS_LEN)
if (len < 0)
return -EINVAL;
down_read(&uts_sem);
nlen = strlen(system_utsname.domainname) + 1;
if (nlen < len)
len = nlen;
err = -EINVAL;
if (nlen > len)
goto out;
err = -EFAULT;
if (!copy_to_user(name, system_utsname.domainname, len))
if (!copy_to_user(name, system_utsname.domainname, nlen))
err = 0;
out:
up_read(&uts_sem);
return err;
}
......
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