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nl80211: check nla_parse_nested() return values

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At the very least we should check the return value if
nla_parse_nested() is called with a non-NULL policy.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-06-29 09:33:39 +02:00
commit 95bca62fb7
1 changed files with 11 additions and 5 deletions
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16
net/wireless/nl80211.c
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@ -10949,9 +10949,12 @@ static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
rem) {
u8 *mask_pat;
nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
nl80211_packet_pattern_policy,
info->extack);
err = nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
nl80211_packet_pattern_policy,
info->extack);
if (err)
goto error;
err = -EINVAL;
if (!pat_tb[NL80211_PKTPAT_MASK] ||
!pat_tb[NL80211_PKTPAT_PATTERN])
@ -11200,8 +11203,11 @@ static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
rem) {
u8 *mask_pat;
nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
nl80211_packet_pattern_policy, NULL);
err = nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
nl80211_packet_pattern_policy, NULL);
if (err)
return err;
if (!pat_tb[NL80211_PKTPAT_MASK] ||
!pat_tb[NL80211_PKTPAT_PATTERN])
return -EINVAL;