From 1c8272bd18cf284de5cb43fb6b0e0457041a17b2 Mon Sep 17 00:00:00 2001 From: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de> Date: Tue, 18 Feb 2014 14:39:27 +0100 Subject: [PATCH] ieee802154: fix faulty check in set_phy_params api phy_set_csma_params has a redundant (and impossible) check for "retries", found by smatch. The check was supposed to be for frame_retries, but wasn't moved during development when phy_set_frame_retries was introduced. Also, maxBE >= 3 as required by the standard is not enforced. Remove the redundant check, assure max_be >= 3 and check -1 <= frame_retries <= 7 in the correct function. Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/ieee802154/nl-phy.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/ieee802154/nl-phy.c b/net/ieee802154/nl-phy.c index c9dfd6f59e34..222310a07762 100644 --- a/net/ieee802154/nl-phy.c +++ b/net/ieee802154/nl-phy.c @@ -436,8 +436,7 @@ static int phy_set_csma_params(struct wpan_phy *phy, struct genl_info *info) if (info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]) max_be = nla_get_u8(info->attrs[IEEE802154_ATTR_CSMA_MAX_BE]); - if (retries > 5 || max_be > 8 || min_be > max_be || - retries < -1 || retries > 7) + if (retries > 5 || max_be < 3 || max_be > 8 || min_be > max_be) return -EINVAL; rc = phy->set_csma_params(phy, min_be, max_be, retries); @@ -456,6 +455,9 @@ static int phy_set_frame_retries(struct wpan_phy *phy, struct genl_info *info) s8 retries = nla_get_s8(info->attrs[IEEE802154_ATTR_FRAME_RETRIES]); int rc; + if (retries < -1 || retries > 7) + return -EINVAL; + rc = phy->set_frame_retries(phy, retries); if (rc < 0) return rc; -- GitLab