From: Jiasheng Jiang jiasheng@iscas.ac.cn
[ Upstream commit f94b47c6bde624d6c07f43054087607c52054a95 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/staging/r8188eu/core/rtw_xmit.c | 13 +++++++++++-- drivers/staging/r8188eu/include/rtw_xmit.h | 2 +- 2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/r8188eu/core/rtw_xmit.c b/drivers/staging/r8188eu/core/rtw_xmit.c index 46fe62c7c32c..0ee4f88a60d4 100644 --- a/drivers/staging/r8188eu/core/rtw_xmit.c +++ b/drivers/staging/r8188eu/core/rtw_xmit.c @@ -179,7 +179,12 @@ 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++) @@ -1516,7 +1521,7 @@ s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe) 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; @@ -1524,6 +1529,8 @@ 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;
@@ -1540,6 +1547,8 @@ void rtw_alloc_hwxmits(struct adapter *padapter) hwxmits[3] .sta_queue = &pxmitpriv->bk_pending; } else { } + + return 0; }
void rtw_free_hwxmits(struct adapter *padapter) diff --git a/drivers/staging/r8188eu/include/rtw_xmit.h b/drivers/staging/r8188eu/include/rtw_xmit.h index 5f6e2402e5c4..762a2fa3bd17 100644 --- a/drivers/staging/r8188eu/include/rtw_xmit.h +++ b/drivers/staging/r8188eu/include/rtw_xmit.h @@ -345,7 +345,7 @@ s32 rtw_txframes_sta_ac_pending(struct adapter *padapter, void rtw_init_hwxmits(struct hw_xmit *phwxmit, int entry); s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter); void _rtw_free_xmit_priv(struct xmit_priv *pxmitpriv); -void rtw_alloc_hwxmits(struct adapter *padapter); +int rtw_alloc_hwxmits(struct adapter *padapter); void rtw_free_hwxmits(struct adapter *padapter); s32 rtw_xmit(struct adapter *padapter, struct sk_buff **pkt);