From: Luis R. Rodriguez Date: Wed, 25 Mar 2009 01:21:08 +0000 (-0400) Subject: cfg80211: fix NULL pointer deference in reg_device_remove() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0ad8acaf434d360ad99813d981a68e605d6c8179;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git cfg80211: fix NULL pointer deference in reg_device_remove() We won't ever get here as regulatory_hint_core() can only fail on -ENOMEM and in that case we don't initialize cfg80211 but this is technically correct code. This is actually good for stable, where we don't check for -ENOMEM failure on __regulatory_hint()'s failure. Cc: stable@kernel.org Reported-by: Quentin Armitage Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 6327e1617acb..6c1993d99902 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -2095,11 +2095,12 @@ int set_regdom(const struct ieee80211_regdomain *rd) /* Caller must hold cfg80211_mutex */ void reg_device_remove(struct wiphy *wiphy) { - struct wiphy *request_wiphy; + struct wiphy *request_wiphy = NULL; assert_cfg80211_lock(); - request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); + if (last_request) + request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); kfree(wiphy->regd); if (!last_request || !request_wiphy)