diff mbox series

[v2,4/4] staging: rtl8712: fix potential memory leak

Message ID 0a3414b12031f6cdcba81a8725e91eb9567ff34f.1666688642.git.namcaov@gmail.com
State New
Headers
Series staging: rtl8712: clean up dynamic memory management |

Commit Message

Nam Cao Oct. 25, 2022, 9:12 a.m. UTC 
  In r8712_init_drv_sw(), whenever any function call returns error, it is
returned immediately without properly cleaning up the other successfully
executed functions. This can cause memory leak.

Instead of return immediately, free all the allocated buffers first.

Signed-off-by: Nam Cao <namcaov@gmail.com>
---
 drivers/staging/rtl8712/os_intfs.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/staging/rtl8712/os_intfs.c b/drivers/staging/rtl8712/os_intfs.c
index 205b7d66a40a..a2f3645be0cc 100644
--- a/drivers/staging/rtl8712/os_intfs.c
+++ b/drivers/staging/rtl8712/os_intfs.c
@@ -304,29 +304,42 @@  int r8712_init_drv_sw(struct _adapter *padapter)
 	padapter->cmdpriv.padapter = padapter;
 	ret = r8712_init_evt_priv(&padapter->evtpriv);
 	if (ret)
-		return ret;
+		goto free_cmd;
 	ret = r8712_init_mlme_priv(padapter);
 	if (ret)
-		return ret;
+		goto free_evt;
 	ret = _r8712_init_xmit_priv(&padapter->xmitpriv, padapter);
 	if (ret)
-		return ret;
+		goto free_mlme;
 	ret = _r8712_init_recv_priv(&padapter->recvpriv, padapter);
 	if (ret)
-		return ret;
+		goto free_xmit;
 	memset((unsigned char *)&padapter->securitypriv, 0,
 	       sizeof(struct security_priv));
 	timer_setup(&padapter->securitypriv.tkip_timer,
 		    r8712_use_tkipkey_handler, 0);
 	ret = _r8712_init_sta_priv(&padapter->stapriv);
 	if (ret)
-		return ret;
+		goto free_recv;
 	padapter->stapriv.padapter = padapter;
 	r8712_init_bcmc_stainfo(padapter);
 	r8712_init_pwrctrl_priv(padapter);
 	mp871xinit(padapter);
 	init_default_value(padapter);
 	r8712_InitSwLeds(padapter);
+
+	return 0;
+
+free_recv:
+	_r8712_free_recv_priv(&padapter->recvpriv);
+free_xmit:
+	_free_xmit_priv(&padapter->xmitpriv);
+free_mlme:
+	r8712_free_mlme_priv(&padapter->mlmepriv);
+free_evt:
+	r8712_free_evt_priv(&padapter->evtpriv);
+free_cmd:
+	r8712_free_cmd_priv(&padapter->cmdpriv);
 	return ret;
 }