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wifi: nl80211: Add checks for nla_nest_start() in nl80211_send_iface()

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[ Upstream commit 5cc58b3766 ]

As the nla_nest_start() may fail with NULL returned, the return value needs
to be checked.

Fixes: ce08cd344a ("wifi: nl80211: expose link information for interfaces")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221129014211.56558-1-yuancan@huawei.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yuan Can 2022-11-29 01:42:11 +00:00 committed by Greg Kroah-Hartman
parent 16784455e9
commit 82980218a9
1 changed files with 3 additions and 0 deletions
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3
net/wireless/nl80211.c
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@ -3849,6 +3849,9 @@ static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flag
for_each_valid_link(wdev, link_id) {
struct nlattr *link = nla_nest_start(msg, link_id + 1);
if (!link)
goto nla_put_failure;
if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))
goto nla_put_failure;
if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,