i2o: fix overflow of copy_to_user()

If (len > reslen) we must not call copy_to_user() since kernel buffer is
smaller than we want to copy.  Similar code in this file is correct, so
this bug was a typo.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index c4b117f5fb70..4dd39a03082a 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -115,7 +115,7 @@ static int i2o_cfg_gethrt(unsigned long arg)
         put_user(len, kcmd.reslen);
         if (len > reslen)
                 ret = -ENOBUFS;
-        if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
+        else if (copy_to_user(kcmd.resbuf, (void *)hrt, len))
                 ret = -EFAULT;
 
         return ret;