linux-kernel - [PATCH] staging: rtl8723bs: hal: Add null check after memory allocation

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Date:   Sun, 16 Jun 2019 08:44:09 +0530
From:   Hariprasad Kelam <hariprasad.kelam@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Arnd Bergmann <arnd@...db.de>,
        Colin Ian King <colin.king@...onical.com>,
        Hariprasad Kelam <hariprasad.kelam@...il.com>,
        Payal Kshirsagar <payal.s.kshirsagar.98@...il.com>,
        Madhumitha Prabakaran <madhumithabiw@...il.com>,
        Nishka Dasgupta <nishka.dasgupta@...oo.com>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: rtl8723bs: hal: Add null check after memory
 allocation

Add NULL check post call to rtw_zmalloc.

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@...il.com>
---
 drivers/staging/rtl8723bs/hal/sdio_ops.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/rtl8723bs/hal/sdio_ops.c b/drivers/staging/rtl8723bs/hal/sdio_ops.c
index ac79de8..9177c18 100644
--- a/drivers/staging/rtl8723bs/hal/sdio_ops.c
+++ b/drivers/staging/rtl8723bs/hal/sdio_ops.c
@@ -816,6 +816,9 @@ void clearinterrupt8723bsdio(struct adapter *adapter)
 	haldata = GET_HAL_DATA(adapter);
 	clear = rtw_zmalloc(4);
 
+	if (!clear)
+		return;
+
 	/*  Clear corresponding HISR Content if needed */
 	*(__le32 *)clear = cpu_to_le32(haldata->sdio_hisr & MASK_SDIO_HISR_CLEAR);
 	if (*(__le32 *)clear) {
-- 
2.7.4