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| author |   Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2022-05-18 15:59:57 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-19 17:45:56 +0200 |
| commit | f94b47c6bde624d6c07f43054087607c52054a95 (patch) | |
| tree | b794a10f5097b4d0201344f3ddbdb23136ced9a5 /drivers/staging/r8188eu/core/rtw_xmit.c | |
| parent | staging: r8188eu: fix warnings in rtw_wlan_util (diff) | |
| download | linux-dev-f94b47c6bde624d6c07f43054087607c52054a95.tar.xz linux-dev-f94b47c6bde624d6c07f43054087607c52054a95.zip | |
staging: r8188eu: add check for kzalloc
As kzalloc() may return null pointer, it should be better to
check the return value and return error if fails in order
to avoid dereference of null pointer.
Moreover, the return value of rtw_alloc_hwxmits() should also
be dealt with.
Fixes: 15865124feed ("staging: r8188eu: introduce new core dir for RTL8188eu driver")
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20220518075957.514603-1-jiasheng@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/r8188eu/core/rtw_xmit.c')
| -rw-r--r-- | drivers/staging/r8188eu/core/rtw_xmit.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/staging/r8188eu/core/rtw_xmit.c b/drivers/staging/r8188eu/core/rtw_xmit.c index f209f5379af8..3d8e9dea7651 100644 --- a/drivers/staging/r8188eu/core/rtw_xmit.c +++ b/drivers/staging/r8188eu/core/rtw_xmit.c @@ -178,7 +178,12 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter) pxmitpriv->free_xmit_extbuf_cnt = num_xmit_extbuf; - rtw_alloc_hwxmits(padapter); + res = rtw_alloc_hwxmits(padapter); + if (res) { + res = _FAIL; + goto exit; + } + rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry); for (i = 0; i < 4; i++) @@ -1465,7 +1470,7 @@ exit: return res; } -void rtw_alloc_hwxmits(struct adapter *padapter) +int rtw_alloc_hwxmits(struct adapter *padapter) { struct hw_xmit *hwxmits; struct xmit_priv *pxmitpriv = &padapter->xmitpriv; @@ -1473,6 +1478,8 @@ void rtw_alloc_hwxmits(struct adapter *padapter) pxmitpriv->hwxmit_entry = HWXMIT_ENTRY; pxmitpriv->hwxmits = kzalloc(sizeof(struct hw_xmit) * pxmitpriv->hwxmit_entry, GFP_KERNEL); + if (!pxmitpriv->hwxmits) + return -ENOMEM; hwxmits = pxmitpriv->hwxmits; @@ -1489,6 +1496,8 @@ void rtw_alloc_hwxmits(struct adapter *padapter) hwxmits[3] .sta_queue = &pxmitpriv->bk_pending; } else { } + + return 0; } void rtw_free_hwxmits(struct adapter *padapter) |