From: Aditya Pakki <pakki001@umn.edu>
To: pakki001@umn.edu
Cc: kjlu@umn.edu, Larry Finger <Larry.Finger@lwfinger.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Michael Straube <straube.linux@gmail.com>,
Colin Ian King <colin.king@canonical.com>,
Hardik Singh Rathore <hardiksingh.k@gmail.com>,
Hans de Goede <hdegoede@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Nathan Chancellor <natechancellor@gmail.com>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3] staging: rtl8188eu: Fix potential NULL pointer dereference of kcalloc
Date: Wed, 20 Mar 2019 12:21:35 -0500 [thread overview]
Message-ID: <20190320172142.1305-1-pakki001@umn.edu> (raw)
hwxmits is allocated via kcalloc and not checked for failure before its
dereference. The patch fixes this problem by returning error upstream
in rtl8723bs, rtl8188eu.
Signed-off-by: Aditya Pakki <pakki001@umn.edu>
---
v2: Move signed off above version change log.
v1: Return error and remove print in case of failure, per Greg
---
drivers/staging/rtl8188eu/core/rtw_xmit.c | 9 +++++++--
drivers/staging/rtl8188eu/include/rtw_xmit.h | 2 +-
drivers/staging/rtl8723bs/core/rtw_xmit.c | 14 +++++++-------
drivers/staging/rtl8723bs/include/rtw_xmit.h | 2 +-
4 files changed, 16 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/rtl8188eu/core/rtw_xmit.c b/drivers/staging/rtl8188eu/core/rtw_xmit.c
index 1723a47a96b4..952f2ab51347 100644
--- a/drivers/staging/rtl8188eu/core/rtw_xmit.c
+++ b/drivers/staging/rtl8188eu/core/rtw_xmit.c
@@ -174,7 +174,9 @@ 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 == _FAIL)
+ goto exit;
rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
for (i = 0; i < 4; i++)
@@ -1503,7 +1505,7 @@ s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe)
return res;
}
-void rtw_alloc_hwxmits(struct adapter *padapter)
+s32 rtw_alloc_hwxmits(struct adapter *padapter)
{
struct hw_xmit *hwxmits;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
@@ -1512,6 +1514,8 @@ void rtw_alloc_hwxmits(struct adapter *padapter)
pxmitpriv->hwxmits = kcalloc(pxmitpriv->hwxmit_entry,
sizeof(struct hw_xmit), GFP_KERNEL);
+ if (!pxmitpriv->hwxmits)
+ return _FAIL;
hwxmits = pxmitpriv->hwxmits;
@@ -1519,6 +1523,7 @@ void rtw_alloc_hwxmits(struct adapter *padapter)
hwxmits[1] .sta_queue = &pxmitpriv->vi_pending;
hwxmits[2] .sta_queue = &pxmitpriv->be_pending;
hwxmits[3] .sta_queue = &pxmitpriv->bk_pending;
+ return _SUCCESS;
}
void rtw_free_hwxmits(struct adapter *padapter)
diff --git a/drivers/staging/rtl8188eu/include/rtw_xmit.h b/drivers/staging/rtl8188eu/include/rtw_xmit.h
index 788f59c74ea1..ba7e15fbde72 100644
--- a/drivers/staging/rtl8188eu/include/rtw_xmit.h
+++ b/drivers/staging/rtl8188eu/include/rtw_xmit.h
@@ -336,7 +336,7 @@ 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);
+s32 rtw_alloc_hwxmits(struct adapter *padapter);
void rtw_free_hwxmits(struct adapter *padapter);
s32 rtw_xmit(struct adapter *padapter, struct sk_buff **pkt);
diff --git a/drivers/staging/rtl8723bs/core/rtw_xmit.c b/drivers/staging/rtl8723bs/core/rtw_xmit.c
index 094d61bcb469..b87f13a0b563 100644
--- a/drivers/staging/rtl8723bs/core/rtw_xmit.c
+++ b/drivers/staging/rtl8723bs/core/rtw_xmit.c
@@ -260,7 +260,9 @@ s32 _rtw_init_xmit_priv(struct xmit_priv *pxmitpriv, struct adapter *padapter)
}
}
- rtw_alloc_hwxmits(padapter);
+ res = rtw_alloc_hwxmits(padapter);
+ if (res == _FAIL)
+ goto exit;
rtw_init_hwxmits(pxmitpriv->hwxmits, pxmitpriv->hwxmit_entry);
for (i = 0; i < 4; i++) {
@@ -2144,7 +2146,7 @@ s32 rtw_xmit_classifier(struct adapter *padapter, struct xmit_frame *pxmitframe)
return res;
}
-void rtw_alloc_hwxmits(struct adapter *padapter)
+s32 rtw_alloc_hwxmits(struct adapter *padapter)
{
struct hw_xmit *hwxmits;
struct xmit_priv *pxmitpriv = &padapter->xmitpriv;
@@ -2155,10 +2157,8 @@ void rtw_alloc_hwxmits(struct adapter *padapter)
pxmitpriv->hwxmits = rtw_zmalloc(sizeof(struct hw_xmit) * pxmitpriv->hwxmit_entry);
- if (pxmitpriv->hwxmits == NULL) {
- DBG_871X("alloc hwxmits fail!...\n");
- return;
- }
+ if (!pxmitpriv->hwxmits)
+ return _FAIL;
hwxmits = pxmitpriv->hwxmits;
@@ -2204,7 +2204,7 @@ void rtw_alloc_hwxmits(struct adapter *padapter)
}
-
+ return _SUCCESS;
}
void rtw_free_hwxmits(struct adapter *padapter)
diff --git a/drivers/staging/rtl8723bs/include/rtw_xmit.h b/drivers/staging/rtl8723bs/include/rtw_xmit.h
index 1b38b9182b31..37f42b2f22f1 100644
--- a/drivers/staging/rtl8723bs/include/rtw_xmit.h
+++ b/drivers/staging/rtl8723bs/include/rtw_xmit.h
@@ -487,7 +487,7 @@ 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);
+s32 rtw_alloc_hwxmits(struct adapter *padapter);
void rtw_free_hwxmits(struct adapter *padapter);
--
2.17.1
next reply other threads:[~2019-03-20 17:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 17:21 Aditya Pakki [this message]
2019-03-20 19:42 ` [PATCH v3] staging: rtl8188eu: Fix potential NULL pointer dereference of kcalloc Hans de Goede
2019-03-20 20:20 ` Mukesh Ojha
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