From 8310a32c15c76623bbe2425d38688a9d5b3e50a9 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Fri, 21 Jul 2006 14:12:39 -0700 Subject: [SPARC]: Fix length parameter verification in sys_getdomainname(). Found by scrashme. Signed-off-by: David S. Miller --- arch/sparc/kernel/sys_sparc.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'arch/sparc/kernel/sys_sparc.c') diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c index 0cdfc9d294b4..a41c8a5c2007 100644 --- a/arch/sparc/kernel/sys_sparc.c +++ b/arch/sparc/kernel/sys_sparc.c @@ -465,21 +465,21 @@ sys_rt_sigaction(int sig, asmlinkage int sys_getdomainname(char __user *name, int len) { - int nlen; - int err = -EFAULT; + int nlen, err; + if (len < 0 || len > __NEW_UTS_LEN) + return -EINVAL; + down_read(&uts_sem); nlen = strlen(system_utsname.domainname) + 1; - if (nlen < len) len = nlen; - if (len > __NEW_UTS_LEN) - goto done; - if (copy_to_user(name, system_utsname.domainname, len)) - goto done; - err = 0; -done: + + err = -EFAULT; + if (!copy_to_user(name, system_utsname.domainname, len)) + err = 0; + up_read(&uts_sem); return err; } -- cgit v1.2.2