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mac80211: add missing null return check from call to ieee80211_get_sband

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The return from ieee80211_get_sband can potentially be a null pointer, so
it seems prudent to add a null check to avoid a null pointer dereference
on sband.

Addresses-Coverity: ("Dereference null return")
Fixes: 2ab4587675 ("mac80211: add support for the ADDBA extension element")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20190730143205.14261-1-colin.king@canonical.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Colin Ian King 2019-07-30 15:32:05 +01:00 committed by Johannes Berg
parent 2ab4587675
commit f12cac539f
1 changed files with 2 additions and 0 deletions
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2
net/mac80211/agg-rx.c
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@ -189,6 +189,8 @@ static void ieee80211_add_addbaext(struct ieee80211_sub_if_data *sdata,
u8 *pos; u8 *pos;
sband = ieee80211_get_sband(sdata); sband = ieee80211_get_sband(sdata);
if (!sband)
return;
he_cap = ieee80211_get_he_iftype_cap(sband, sdata->vif.type); he_cap = ieee80211_get_he_iftype_cap(sband, sdata->vif.type);
if (!he_cap) if (!he_cap)
return; return;