From: "Mohammed Shafi Shajakhan (Mohammed Shafi)" <mohammed@qti.qualcomm.com>
To: Julia Lawall <julia.lawall@lip6.fr>
Cc: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
"johannes@sipsolutions.net" <johannes@sipsolutions.net>,
"mohammed@codeaurora.org" <mohammed@codeaurora.org>,
"michal.kazior@tieto.com" <michal.kazior@tieto.com>,
"kbuild-all@01.org" <kbuild-all@01.org>
Subject: Re: [PATCH] mac80211: Fix possible sband related NULL pointer de-reference (fwd)
Date: Fri, 28 Apr 2017 10:51:14 +0000 [thread overview]
Message-ID: <1493376672264.91080@qti.qualcomm.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1704281205580.3387@hadrien>
=0A=
Please check whether an unlock is missing on line 3009-3013.=0A=
=0A=
[shafi] thanks Julia for catching it early, disappointed with myself for =
missing=0A=
the straight forward unlock :-(=0A=
=0A=
if (WARN_ON(!sta)) {=0A=
mutex_unlock(&sdata->local->sta_mtx);=0A=
ret =3D false;=0A=
goto out;=0A=
}=0A=
=0A=
sband =3D ieee80211_get_sband(sdata);=0A=
if (!sband) {=0A=
ret =3D false;=0A=
goto out;=0A=
}=0A=
=0A=
---------- Forwarded message ----------=0A=
Date: Fri, 28 Apr 2017 14:04:47 +0800=0A=
From: kbuild test robot <fengguang.wu@intel.com>=0A=
To: kbuild@01.org=0A=
Cc: Julia Lawall <julia.lawall@lip6.fr>=0A=
Subject: Re: [PATCH] mac80211: Fix possible sband related NULL pointer=0A=
de-reference=0A=
=0A=
In-Reply-To: <1493277338-25726-1-git-send-email-mohammed@qca.qualcomm.com>=
=0A=
=0A=
Hi Mohammed,=0A=
=0A=
[auto build test WARNING on mac80211/master]=0A=
[also build test WARNING on v4.11-rc8 next-20170427]=0A=
[if your patch is applied to the wrong git tree, please drop us a note to h=
elp improve the system]=0A=
=0A=
url: https://github.com/0day-ci/linux/commits/Mohammed-Shafi-Shajakhan/m=
ac80211-Fix-possible-sband-related-NULL-pointer-de-reference/20170428-12042=
5=0A=
base: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git =
master=0A=
:::::: branch date: 2 hours ago=0A=
:::::: commit date: 2 hours ago=0A=
=0A=
>> net/mac80211/mlme.c:3120:1-7: preceding lock on line 2997=0A=
=0A=
git remote add linux-review https://github.com/0day-ci/linux=0A=
git remote update linux-review=0A=
git checkout 4b2b8c708017f5d2569fc5d9e7a76c6c1b08dd8c=0A=
vim +3120 net/mac80211/mlme.c=0A=
=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
2991 sdata_info(sdata,=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
2992 "VHT AP is missing VHT capability/operation=
\n");=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
2993 ret =3D false;=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
2994 goto out;=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
2995 }=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
2996=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
@2997 mutex_lock(&sdata->local->sta_mtx);=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
2998 /*=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
2999 * station info was already allocated and inserted before=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
3000 * the association and should be available to us=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
3001 */=0A=
7852e3618 net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3002 sta =3D sta_info_get(sdata, cbss->bssid);=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
3003 if (WARN_ON(!sta)) {=0A=
2a33bee27 net/mac80211/mlme.c Guy Eilam 2011-08-17 =
3004 mutex_unlock(&sdata->local->sta_mtx);=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3005 ret =3D false;=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3006 goto out;=0A=
f0706e828 net/mac80211/ieee80211_sta.c Jiri Benc 2007-05-05 =
3007 }=0A=
f0706e828 net/mac80211/ieee80211_sta.c Jiri Benc 2007-05-05 =
3008=0A=
4b2b8c708 net/mac80211/mlme.c Mohammed Shafi Shajakhan 2017-04-27 =
3009 sband =3D ieee80211_get_sband(sdata);=0A=
4b2b8c708 net/mac80211/mlme.c Mohammed Shafi Shajakhan 2017-04-27 =
3010 if (!sband) {=0A=
4b2b8c708 net/mac80211/mlme.c Mohammed Shafi Shajakhan 2017-04-27 =
3011 ret =3D false;=0A=
4b2b8c708 net/mac80211/mlme.c Mohammed Shafi Shajakhan 2017-04-27 =
3012 goto out;=0A=
4b2b8c708 net/mac80211/mlme.c Mohammed Shafi Shajakhan 2017-04-27 =
3013 }=0A=
f709fc696 net/mac80211/ieee80211_sta.c Luis Carlos Cobo 2008-02-23 =
3014=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3015 /* Set up internal HT/VHT capabilities */=0A=
a8243b724 net/mac80211/mlme.c Johannes Berg 2012-11-22 =
3016 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABL=
E_HT))=0A=
ef96a8420 net/mac80211/mlme.c Ben Greear 2011-11-18 =
3017 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,=0A=
e1a0c6b3a net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3018 elems.ht_cap_elem, s=
ta);=0A=
64f68e5d1 net/mac80211/mlme.c Johannes Berg 2012-03-28 =
3019=0A=
818255ea4 net/mac80211/mlme.c Mahesh Palivela 2012-10-10 =
3020 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISAB=
LE_VHT))=0A=
818255ea4 net/mac80211/mlme.c Mahesh Palivela 2012-10-10 =
3021 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,=0A=
4a34215ef net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3022 elems.vht_cap_elem=
, sta);=0A=
818255ea4 net/mac80211/mlme.c Mahesh Palivela 2012-10-10 =
3023=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3024 /*=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3025 * Some APs, e.g. Netgear WNDR3700, report invalid HT operatio=
n data=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3026 * in their association response, so ignore that data for our =
own=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3027 * configuration. If it changed since the last beacon, we'll g=
et the=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3028 * next beacon and update then.=0A=
30eb1dc2c net/mac80211/mlme.c Johannes Berg 2013-02-08 =
3029 */=0A=
1128958dc net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3030=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3031 /*=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3032 * If an operating mode notification IE is present, override t=
he=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3033 * NSS calculation (that would be done in rate_control_rate_in=
it())=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3034 * and use the # of streams from that element.=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3035 */=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3036 if (elems.opmode_notif &&=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3037 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE=
_BF)) {=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3038 u8 nss;=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3039=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3040 nss =3D *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_R=
X_NSS_MASK;=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3041 nss >>=3D IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3042 nss +=3D 1;=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3043 sta->sta.rx_nss =3D nss;=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3044 }=0A=
bee7f5869 net/mac80211/mlme.c Johannes Berg 2013-02-07 =
3045=0A=
4b7679a56 net/mac80211/mlme.c Johannes Berg 2008-09-18 =
3046 rate_control_rate_init(sta);=0A=
f0706e828 net/mac80211/ieee80211_sta.c Jiri Benc 2007-05-05 =
3047=0A=
93f0490e5 net/mac80211/mlme.c Tamizh chelvam 2015-10-07 =
3048 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {=0A=
c2c98fdeb net/mac80211/mlme.c Johannes Berg 2011-09-29 =
3049 set_sta_flag(sta, WLAN_STA_MFP);=0A=
93f0490e5 net/mac80211/mlme.c Tamizh chelvam 2015-10-07 =
3050 sta->sta.mfp =3D true;=0A=
93f0490e5 net/mac80211/mlme.c Tamizh chelvam 2015-10-07 =
3051 } else {=0A=
93f0490e5 net/mac80211/mlme.c Tamizh chelvam 2015-10-07 =
3052 sta->sta.mfp =3D false;=0A=
93f0490e5 net/mac80211/mlme.c Tamizh chelvam 2015-10-07 =
3053 }=0A=
5394af4d8 net/mac80211/mlme.c Jouni Malinen 2009-01-08 =
3054=0A=
527871d72 net/mac80211/mlme.c Johannes Berg 2015-03-21 =
3055 sta->sta.wme =3D elems.wmm_param && local->hw.queues >=3D IEEE=
80211_NUM_ACS;=0A=
ddf4ac53f net/mac80211/mlme.c Johannes Berg 2008-10-22 =
3056=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3057 err =3D sta_info_move_state(sta, IEEE80211_STA_ASSOC);=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3058 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3059 err =3D sta_info_move_state(sta, IEEE80211_STA_AUTHORI=
ZED);=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3060 if (err) {=0A=
bdcbd8e0e net/mac80211/mlme.c Johannes Berg 2012-06-22 =
3061 sdata_info(sdata,=0A=
bdcbd8e0e net/mac80211/mlme.c Johannes Berg 2012-06-22 =
3062 "failed to move station %pM to desired stat=
e\n",=0A=
bdcbd8e0e net/mac80211/mlme.c Johannes Berg 2012-06-22 =
3063 sta->sta.addr);=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3064 WARN_ON(__sta_info_destroy(sta));=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3065 mutex_unlock(&sdata->local->sta_mtx);=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3066 ret =3D false;=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3067 goto out;=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3068 }=0A=
c8987876e net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3069=0A=
7852e3618 net/mac80211/mlme.c Johannes Berg 2012-01-20 =
3070 mutex_unlock(&sdata->local->sta_mtx);=0A=
ddf4ac53f net/mac80211/mlme.c Johannes Berg 2008-10-22 =
3071=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3072 /*=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3073 * Always handle WMM once after association regardless=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3074 * of the first value the AP uses. Setting -1 here has=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3075 * that effect because the AP values is an unsigned=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3076 * 4-bit value.=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3077 */=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3078 ifmgd->wmm_last_param_set =3D -1;=0A=
f2176d724 net/mac80211/mlme.c Juuso Oikarinen 2010-09-28 =
3079=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3080 if (ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {=0A=
cec662835 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3081 ieee80211_set_wmm_default(sdata, false, false);=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3082 } else if (!ieee80211_sta_wmm_params(local, sdata, elems.wmm_p=
aram,=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3083 elems.wmm_param_len)) {=
=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3084 /* still enable QoS since we might have HT/VHT */=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3085 ieee80211_set_wmm_default(sdata, false, true);=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3086 /* set the disable-WMM flag in this case to disable=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3087 * tracking WMM parameter changes in the beacon if=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3088 * the parameters weren't actually valid. Doing so=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3089 * avoids changing parameters very strangely when=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3090 * the AP is going back and forth between valid and=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3091 * invalid parameters.=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3092 */=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3093 ifmgd->flags |=3D IEEE80211_STA_DISABLE_WMM;=0A=
2ed77ea69 net/mac80211/mlme.c Johannes Berg 2015-10-22 =
3094 }=0A=
3abead59f net/mac80211/mlme.c Johannes Berg 2012-03-02 =
3095 changed |=3D BSS_CHANGED_QOS;=0A=
f0706e828 net/mac80211/ieee80211_sta.c Jiri Benc 2007-05-05 =
3096=0A=
60f8b39c9 net/mac80211/mlme.c Johannes Berg 2008-09-08 =
3097 /* set AID and assoc capability,=0A=
60f8b39c9 net/mac80211/mlme.c Johannes Berg 2008-09-08 =
3098 * ieee80211_set_associated() will tell the driver */=0A=
60f8b39c9 net/mac80211/mlme.c Johannes Berg 2008-09-08 =
3099 bss_conf->aid =3D aid;=0A=
60f8b39c9 net/mac80211/mlme.c Johannes Berg 2008-09-08 =
3100 bss_conf->assoc_capability =3D capab_info;=0A=
0c1ad2cac net/mac80211/mlme.c Johannes Berg 2009-12-23 =
3101 ieee80211_set_associated(sdata, cbss, changed);=0A=
a607268a0 net/mac80211/ieee80211_sta.c Bruno Randolf 2008-02-18 =
3102=0A=
15b7b0629 net/mac80211/mlme.c Kalle Valo 2009-03-22 =
3103 /*=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3104 * If we're using 4-addr mode, let the AP know that we're=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3105 * doing so, so that it can create the STA VLAN on its side=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3106 */=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3107 if (ifmgd->use_4addr)=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3108 ieee80211_send_4addr_nullfunc(local, sdata);=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3109=0A=
d524215f6 net/mac80211/mlme.c Felix Fietkau 2010-01-08 =
3110 /*=0A=
b291ba111 net/mac80211/mlme.c Johannes Berg 2009-07-10 =
3111 * Start timer to probe the connection to the AP now.=0A=
b291ba111 net/mac80211/mlme.c Johannes Berg 2009-07-10 =
3112 * Also start the timer that will detect beacon loss.=0A=
15b7b0629 net/mac80211/mlme.c Kalle Valo 2009-03-22 =
3113 */=0A=
b291ba111 net/mac80211/mlme.c Johannes Berg 2009-07-10 =
3114 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);=
=0A=
d3a910a8e net/mac80211/mlme.c Luis R. Rodriguez 2010-09-16 =
3115 ieee80211_sta_reset_beacon_monitor(sdata);=0A=
15b7b0629 net/mac80211/mlme.c Kalle Valo 2009-03-22 =
3116=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3117 ret =3D true;=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3118 out:=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
3119 kfree(bss_ies);=0A=
35d865afb net/mac80211/mlme.c Johannes Berg 2013-05-28 =
@3120 return ret;=0A=
a607268a0 net/mac80211/ieee80211_sta.c Bruno Randolf 2008-02-18 =
3121 }=0A=
a607268a0 net/mac80211/ieee80211_sta.c Bruno Randolf 2008-02-18 =
3122=0A=
8d61ffa5e net/mac80211/mlme.c Johannes Berg 2013-05-10 =
3123 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_dat=
a *sdata,=0A=
=0A=
:::::: The code at line 3120 was first introduced by commit=0A=
:::::: 35d865afbbdf79e492f7d61df92b1a9e1d93d26f mac80211: work around broke=
n APs not including HT info=0A=
=0A=
:::::: TO: Johannes Berg <johannes.berg@intel.com>=0A=
:::::: CC: Johannes Berg <johannes.berg@intel.com>=0A=
=0A=
---=0A=
0-DAY kernel test infrastructure Open Source Technology Cent=
er=0A=
https://lists.01.org/pipermail/kbuild-all Intel Corporati=
on=0A=
next prev parent reply other threads:[~2017-04-28 10:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-28 10:06 [PATCH] mac80211: Fix possible sband related NULL pointer de-reference (fwd) Julia Lawall
2017-04-28 10:26 ` Johannes Berg
2017-04-28 10:36 ` Mohammed Shafi Shajakhan (Mohammed Shafi)
2017-04-28 10:51 ` Mohammed Shafi Shajakhan (Mohammed Shafi) [this message]
2017-04-28 11:38 ` Julia Lawall
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