diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2021-10-01 22:11:08 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2021-10-21 17:54:04 +0300 |
| commit | 8223ac199a3849257e86ec27865dc63f034b1cf1 (patch) | |
| tree | e7e391484c4dbe8592e4c8da300442f4a8ec5be1 | |
| parent | 10de5a599f92ef776886073a33ca7bbbe6b14d37 (diff) | |
| download | linux-8223ac199a3849257e86ec27865dc63f034b1cf1.tar.xz | |
mac80211: fix memory leaks with element parsing
My previous commit 5d24828d05f3 ("mac80211: always allocate
struct ieee802_11_elems") had a few bugs and leaked the new
allocated struct in a few error cases, fix that.
Fixes: 5d24828d05f3 ("mac80211: always allocate struct ieee802_11_elems")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20211001211108.9839928e42e0.Ib81ca187d3d3af7ed1bfeac2e00d08a4637c8025@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| -rw-r--r-- | net/mac80211/agg-rx.c | 3 | ||||
| -rw-r--r-- | net/mac80211/ibss.c | 10 | ||||
| -rw-r--r-- | net/mac80211/mlme.c | 36 |
3 files changed, 25 insertions, 24 deletions
diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c index 94c65def102c..470ff0ce3dc7 100644 --- a/net/mac80211/agg-rx.c +++ b/net/mac80211/agg-rx.c @@ -498,13 +498,14 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, elems = ieee802_11_parse_elems(mgmt->u.action.u.addba_req.variable, ies_len, true, mgmt->bssid, NULL); if (!elems || elems->parse_error) - return; + goto free; } __ieee80211_start_rx_ba_session(sta, dialog_token, timeout, start_seq_num, ba_policy, tid, buf_size, true, false, elems ? elems->addba_ext_ie : NULL); +free: kfree(elems); } diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c index 66b00046f0c2..0416c4d22292 100644 --- a/net/mac80211/ibss.c +++ b/net/mac80211/ibss.c @@ -1659,11 +1659,11 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, mgmt->u.action.u.chan_switch.variable, ies_len, true, mgmt->bssid, NULL); - if (!elems || elems->parse_error) - break; - - ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, - rx_status, elems); + if (elems && !elems->parse_error) + ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, + skb->len, + rx_status, + elems); kfree(elems); break; } diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 0ec183a92a01..40b29cfb7cfe 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -3353,8 +3353,10 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, GFP_ATOMIC); rcu_read_unlock(); - if (!bss_ies) - return false; + if (!bss_ies) { + ret = false; + goto out; + } bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, false, mgmt->bssid, @@ -4331,13 +4333,11 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, mgmt->u.action.u.chan_switch.variable, ies_len, true, mgmt->bssid, NULL); - if (!elems || elems->parse_error) - break; - - ieee80211_sta_process_chanswitch(sdata, - rx_status->mactime, - rx_status->device_timestamp, - elems, false); + if (elems && !elems->parse_error) + ieee80211_sta_process_chanswitch(sdata, + rx_status->mactime, + rx_status->device_timestamp, + elems, false); kfree(elems); } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { struct ieee802_11_elems *elems; @@ -4357,17 +4357,17 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, mgmt->u.action.u.ext_chan_switch.variable, ies_len, true, mgmt->bssid, NULL); - if (!elems || elems->parse_error) - break; + if (elems && !elems->parse_error) { + /* for the handling code pretend it was an IE */ + elems->ext_chansw_ie = + &mgmt->u.action.u.ext_chan_switch.data; - /* for the handling code pretend this was also an IE */ - elems->ext_chansw_ie = - &mgmt->u.action.u.ext_chan_switch.data; + ieee80211_sta_process_chanswitch(sdata, + rx_status->mactime, + rx_status->device_timestamp, + elems, false); + } - ieee80211_sta_process_chanswitch(sdata, - rx_status->mactime, - rx_status->device_timestamp, - elems, false); kfree(elems); } break; |