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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/sparc64
parent8a84eb164cc44a7604a27f8118473a82b45472a8 (diff)
[SPARC]: Fix length parameter verification in sys_getdomainname().
Found by scrashme. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc64')
-rw-r--r--arch/sparc64/kernel/sys_sparc.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index 51c056df528e..054d0abdb7ee 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -701,21 +701,21 @@ extern void check_pending(int signum);
asmlinkage long 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;
}