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authorDavid S. Miller <davem@sunset.davemloft.net>2006-07-21 14:12:39 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-07-21 14:18:27 -0700
commit8310a32c15c76623bbe2425d38688a9d5b3e50a9 (patch)
tree47e565ab0f2d04abb32ac8a0a1f0753616fc0607 /arch/sparc
parent8a84eb164cc44a7604a27f8118473a82b45472a8 (diff)
downloadlinux-linaro-stable-8310a32c15c76623bbe2425d38688a9d5b3e50a9.tar.gz
[SPARC]: Fix length parameter verification in sys_getdomainname().
Found by scrashme. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/sys_sparc.c18
1 files changed, 9 insertions, 9 deletions
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;
}