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Mon, 13 Apr 2026 11:08:49 -0700 (PDT) Received: from shyam-VMware-Virtual-Platform.localdomain ([223.181.118.203]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82f0c4df7f5sm14717658b3a.43.2026.04.13.11.08.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Apr 2026 11:08:49 -0700 (PDT) From: Shyam Sunder Reddy Padira To: gregkh@linuxfoundation.org Cc: nayana.mariyappa@gmail.com, s9430939@naver.com, andriy.shevchenko@intel.com, kees@kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Shyam Sunder Reddy Padira Subject: [PATCH] staging: rtl8723bs: os_dep: avoid NULL pointer derefernece in rtw_cbuf_alloc Date: Mon, 13 Apr 2026 23:38:02 +0530 Message-ID: <20260413180803.72647-1-shyamsunderreddypadira@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The return value of kzalloc_flex() is used without ensuring that the allocation succeeded, and the pointer is dereferenced unconditionally. Guard the access to the allocated structure to avoid a potiental NULL pointer dereference if the allocation fails. Signed-off-by: Shyam Sunder Reddy Padira --- drivers/staging/rtl8723bs/os_dep/osdep_service.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/staging/rtl8723bs/os_dep/osdep_service.c b/drivers/sta= ging/rtl8723bs/os_dep/osdep_service.c index 7959daeabc6f..4cfdf7c62344 100644 --- a/drivers/staging/rtl8723bs/os_dep/osdep_service.c +++ b/drivers/staging/rtl8723bs/os_dep/osdep_service.c @@ -194,7 +194,8 @@ struct rtw_cbuf *rtw_cbuf_alloc(u32 size) struct rtw_cbuf *cbuf; =20 cbuf =3D kzalloc_flex(*cbuf, bufs, size); - cbuf->size =3D size; + if (cbuf) + cbuf->size =3D size; =20 return cbuf; } --=20 2.43.0