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author | Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> | 2018-10-17 14:02:47 +0000 |
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committer | Kalle Valo <kvalo@codeaurora.org> | 2018-11-06 18:57:37 +0200 |
commit | 1066bd193d681bda0fbacda9df351241a5ee04d9 (patch) | |
tree | 940d3774eab1c5af889c8d70850906924f2c28ee /drivers/net/wireless/quantenna | |
parent | e966a79c2f761a696dec9cfb0e2d4aa977bf78cb (diff) | |
download | linux-stable-1066bd193d681bda0fbacda9df351241a5ee04d9.tar.gz linux-stable-1066bd193d681bda0fbacda9df351241a5ee04d9.tar.bz2 linux-stable-1066bd193d681bda0fbacda9df351241a5ee04d9.zip |
qtnfmac: fix error handling in control path
This patch fixes the following warnings:
- smatch
drivers/net/wireless/quantenna/qtnfmac/commands.c:132 qtnf_cmd_send_with_reply() warn: variable dereferenced before check 'resp' (see line 117)
drivers/net/wireless/quantenna/qtnfmac/commands.c:716 qtnf_cmd_get_sta_info() error: uninitialized symbol 'var_resp_len'.
drivers/net/wireless/quantenna/qtnfmac/commands.c:1668 qtnf_cmd_get_mac_info() error: uninitialized symbol 'var_data_len'.
drivers/net/wireless/quantenna/qtnfmac/commands.c:1697 qtnf_cmd_get_hw_info() error: uninitialized symbol 'info_len'.
drivers/net/wireless/quantenna/qtnfmac/commands.c:1753 qtnf_cmd_band_info_get() error: uninitialized symbol 'info_len'.
drivers/net/wireless/quantenna/qtnfmac/commands.c:1782 qtnf_cmd_send_get_phy_params() error: uninitialized symbol 'response_size'.
drivers/net/wireless/quantenna/qtnfmac/commands.c:2438 qtnf_cmd_get_chan_stats() error: uninitialized symbol 'var_data_len'.
- gcc-8.2.1
drivers/net/wireless/quantenna/qtnfmac/commands.c: In function 'qtnf_cmd_send_with_reply':
drivers/net/wireless/quantenna/qtnfmac/commands.c:133:54: error: 'resp' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/quantenna')
-rw-r--r-- | drivers/net/wireless/quantenna/qtnfmac/commands.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/net/wireless/quantenna/qtnfmac/commands.c b/drivers/net/wireless/quantenna/qtnfmac/commands.c index bfdc1ad30c13..659e7649fe22 100644 --- a/drivers/net/wireless/quantenna/qtnfmac/commands.c +++ b/drivers/net/wireless/quantenna/qtnfmac/commands.c @@ -84,7 +84,7 @@ static int qtnf_cmd_send_with_reply(struct qtnf_bus *bus, size_t *var_resp_size) { struct qlink_cmd *cmd; - const struct qlink_resp *resp; + struct qlink_resp *resp = NULL; struct sk_buff *resp_skb = NULL; u16 cmd_id; u8 mac_id; @@ -113,7 +113,12 @@ static int qtnf_cmd_send_with_reply(struct qtnf_bus *bus, if (ret) goto out; - resp = (const struct qlink_resp *)resp_skb->data; + if (WARN_ON(!resp_skb || !resp_skb->data)) { + ret = -EFAULT; + goto out; + } + + resp = (struct qlink_resp *)resp_skb->data; ret = qtnf_cmd_check_reply_header(resp, cmd_id, mac_id, vif_id, const_resp_size); if (ret) @@ -686,7 +691,7 @@ int qtnf_cmd_get_sta_info(struct qtnf_vif *vif, const u8 *sta_mac, struct sk_buff *cmd_skb, *resp_skb = NULL; struct qlink_cmd_get_sta_info *cmd; const struct qlink_resp_get_sta_info *resp; - size_t var_resp_len; + size_t var_resp_len = 0; int ret = 0; cmd_skb = qtnf_cmd_alloc_new_cmdskb(vif->mac->macid, vif->vifid, @@ -1650,7 +1655,7 @@ int qtnf_cmd_get_mac_info(struct qtnf_wmac *mac) { struct sk_buff *cmd_skb, *resp_skb = NULL; const struct qlink_resp_get_mac_info *resp; - size_t var_data_len; + size_t var_data_len = 0; int ret = 0; cmd_skb = qtnf_cmd_alloc_new_cmdskb(mac->macid, QLINK_VIFID_RSVD, @@ -1680,8 +1685,8 @@ int qtnf_cmd_get_hw_info(struct qtnf_bus *bus) { struct sk_buff *cmd_skb, *resp_skb = NULL; const struct qlink_resp_get_hw_info *resp; + size_t info_len = 0; int ret = 0; - size_t info_len; cmd_skb = qtnf_cmd_alloc_new_cmdskb(QLINK_MACID_RSVD, QLINK_VIFID_RSVD, QLINK_CMD_GET_HW_INFO, @@ -1709,9 +1714,9 @@ int qtnf_cmd_band_info_get(struct qtnf_wmac *mac, struct ieee80211_supported_band *band) { struct sk_buff *cmd_skb, *resp_skb = NULL; - size_t info_len; struct qlink_cmd_band_info_get *cmd; struct qlink_resp_band_info_get *resp; + size_t info_len = 0; int ret = 0; u8 qband; @@ -1764,8 +1769,8 @@ out: int qtnf_cmd_send_get_phy_params(struct qtnf_wmac *mac) { struct sk_buff *cmd_skb, *resp_skb = NULL; - size_t response_size; struct qlink_resp_phy_params *resp; + size_t response_size = 0; int ret = 0; cmd_skb = qtnf_cmd_alloc_new_cmdskb(mac->macid, 0, @@ -2431,7 +2436,7 @@ int qtnf_cmd_get_chan_stats(struct qtnf_wmac *mac, u16 channel, struct sk_buff *cmd_skb, *resp_skb = NULL; struct qlink_cmd_get_chan_stats *cmd; struct qlink_resp_get_chan_stats *resp; - size_t var_data_len; + size_t var_data_len = 0; int ret = 0; cmd_skb = qtnf_cmd_alloc_new_cmdskb(mac->macid, QLINK_VIFID_RSVD, |