From: Kulikov Vasiliy Date: Wed, 11 Aug 2010 01:02:03 +0000 (-0700) Subject: i2o: fix overflow of copy_to_user() X-Git-Tag: upstream/snapshot3+hdmi~13436 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d929dc2bfd8a58c34f1df0680018fa8ea5caa907;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c index c4b117f..4dd39a0 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;