From bc0384eedb66555f6b4662102675f9bf4a3d12b7 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Fri, 2 Jun 2017 16:40:45 +0100 Subject: [PATCH] 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 Reviewed-by: Igor Mitsyanko Signed-off-by: Kalle Valo --- drivers/net/wireless/quantenna/qtnfmac/commands.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/quantenna/qtnfmac/commands.c b/drivers/net/wireless/quantenna/qtnfmac/commands.c index f0a0cfa7d8a1..cce62f39edaf 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/commands.c +++ b/drivers/net/wireless/quantenna/qtnfmac/commands.c @@ -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,