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qtnfmac: check band before allocating cmd_skb to avoid resource leak 

The current code allocates cmd_skb and then will leak this if band->band
is an illegal value. It is simpler to sanity check the band first before
allocating cmd_skb so that we don't have to free cmd_skb if an invalid
band occurs.

Detected by CoverityScan, CID#1437561 ("Resource Leak")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Igor Mitsyanko <igor.mitsyanko.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
hifive-unleashed-5.1
Colin Ian King 2017-06-02 16:40:45 +01:00 committed by Kalle Valo
parent 292c333300
commit bc0384eedb
1 changed files with 6 additions and 6 deletions
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12
drivers/net/wireless/quantenna/qtnfmac/commands.c
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@ -1300,12 +1300,6 @@ int qtnf_cmd_get_mac_chan_info(struct qtnf_wmac *mac,
int ret = 0;
u8 qband;
cmd_skb = qtnf_cmd_alloc_new_cmdskb(mac->macid, 0,
QLINK_CMD_CHANS_INFO_GET,
sizeof(*cmd));
if (!cmd_skb)
return -ENOMEM;
switch (band->band) {
case NL80211_BAND_2GHZ:
qband = QLINK_BAND_2GHZ;
@ -1320,6 +1314,12 @@ int qtnf_cmd_get_mac_chan_info(struct qtnf_wmac *mac,
return -EINVAL;
}
cmd_skb = qtnf_cmd_alloc_new_cmdskb(mac->macid, 0,
QLINK_CMD_CHANS_INFO_GET,
sizeof(*cmd));
if (!cmd_skb)
return -ENOMEM;
cmd = (struct qlink_cmd_chans_info_get *)cmd_skb->data;
cmd->band = qband;
ret = qtnf_cmd_send_with_reply(mac->bus, cmd_skb, &resp_skb, &res_code,