diff options
| author |   Michal Nazarewicz <mina86@mina86.com> | 2013-12-02 14:09:34 +0100 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2013-12-02 13:11:52 -0500 |
| commit | 3469adb36c41a1fc0217802fa734d4220712e9c2 (patch) | |
| tree | 5adfcf3c533778723fed5c415ca2e2024f7026c8 /drivers/net/wireless/ath/wcn36xx/smd.c | |
| parent | net: wireless: ath9k: avoid possible NULL pointer dereference (diff) | |
| download | linux-dev-3469adb36c41a1fc0217802fa734d4220712e9c2.tar.xz linux-dev-3469adb36c41a1fc0217802fa734d4220712e9c2.zip | |
net: wireless: wcn36xx: fix potential NULL pointer dereference
If kmalloc fails wcn36xx_smd_rsp_process will attempt to dereference
a NULL pointer. There might be a better error recovery then just
printing an error, but printing an error message is better then the
current behaviour.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/smd.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/smd.c b/drivers/net/wireless/ath/wcn36xx/smd.c index de9eb2cfbf4b..366339421d4f 100644 --- a/drivers/net/wireless/ath/wcn36xx/smd.c +++ b/drivers/net/wireless/ath/wcn36xx/smd.c @@ -2041,13 +2041,20 @@ static void wcn36xx_smd_rsp_process(struct wcn36xx *wcn, void *buf, size_t len) case WCN36XX_HAL_DELETE_STA_CONTEXT_IND: mutex_lock(&wcn->hal_ind_mutex); msg_ind = kmalloc(sizeof(*msg_ind), GFP_KERNEL); - msg_ind->msg_len = len; - msg_ind->msg = kmalloc(len, GFP_KERNEL); - memcpy(msg_ind->msg, buf, len); - list_add_tail(&msg_ind->list, &wcn->hal_ind_queue); - queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work); - wcn36xx_dbg(WCN36XX_DBG_HAL, "indication arrived\n"); + if (msg_ind) { + msg_ind->msg_len = len; + msg_ind->msg = kmalloc(len, GFP_KERNEL); + memcpy(msg_ind->msg, buf, len); + list_add_tail(&msg_ind->list, &wcn->hal_ind_queue); + queue_work(wcn->hal_ind_wq, &wcn->hal_ind_work); + wcn36xx_dbg(WCN36XX_DBG_HAL, "indication arrived\n"); + } mutex_unlock(&wcn->hal_ind_mutex); + if (msg_ind) + break; + /* FIXME: Do something smarter then just printing an error. */ + wcn36xx_err("Run out of memory while handling SMD_EVENT (%d)\n", + msg_header->msg_type); break; default: wcn36xx_err("SMD_EVENT (%d) not supported\n", |