From nobody Wed Dec 17 12:12:26 2025 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.2]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8D5B818A959; Tue, 18 Mar 2025 02:58:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.2 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742266737; cv=none; b=j3zixCxcXlDzGDdm48SHZrxTgtBjDv+wqc4lezyxxPiUyvnsD6wbfIScAKMBn471ND0lM2iA0vZrouOECRf9X7d8FoL8Q7xmnPndo7ZvY4nvoXX/7lpHX5Lu+W4fQqEYQ9NXcLLVGizjS59KHfg9h7KD2qe20JcalIFn+yVCgQY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742266737; c=relaxed/simple; bh=1++UtJ/x4fYcljqobaSvICMiESEAey2qNTq0v65tYIA=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=uyqe3rM8JfjRatAzAOGjXER4XWHGOIsuJ+1pwBvIfz8diDhxVmXrUpJbc2xN7dcBSpf6nrPbO28f35oMUy4j6hg2UCJNvqiE+XeGQJbauKiYNeaQKlyAQvOB0jCeHjn/1b4KECaavJqxL5oa8vGzl4pHefnBHHc9B0TEsijbOxM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=MoSynisg; arc=none smtp.client-ip=117.135.210.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="MoSynisg" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=xip++ Y+wP8cdm9eHLHgn2+Hxo2dOyBCVc1sz06DsCjw=; b=MoSynisgKDhxtQDPgi0N4 6xCc6CxSrxkk2oZW3Z156rNWkqt2R0tPMc5SbcpNjY75X4Ti5TdR5ltKmOXTibob 8Amvr2uVfneRcuFpOI9Fg92RBlzZdK0BzW19nret4oMuDz/R6Vm34QKMlHIrIz+S R8cbo1rATD0yOFApy9UKOc= Received: from icess-ProLiant-DL380-Gen10.. (unknown []) by gzsmtp2 (Coremail) with SMTP id PSgvCgCnb3td4dhn4C1QAA--.21105S4; Tue, 18 Mar 2025 10:58:38 +0800 (CST) From: Haoxiang Li To: linux@dominikbrodowski.net, haoxiang_li2024@163.com Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH RESEND] pcmcia: fix a potential null pointer dereference in __iodyn_find_io_region() Date: Tue, 18 Mar 2025 10:58:36 +0800 Message-Id: <20250318025836.1569313-1-haoxiang_li2024@163.com> X-Mailer: git-send-email 2.25.1 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 X-CM-TRANSID: PSgvCgCnb3td4dhn4C1QAA--.21105S4 X-Coremail-Antispam: 1Uf129KBjvdXoW7Gr4xKr1rur45Jr45Zw17trb_yoW3AFc_ur 10gryxGrWUtr4Ikw13trsavrySvrn5Wr1kuFn5t3Z3ur9F9w4SqFnxAr98W34xJryfAF1k AryDJrnrCasxWjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sR_Yii3UUUUU== X-CM-SenderInfo: xkdr5xpdqjszblsqjki6rwjhhfrp/1tbiqAETbmfX849cAgABsH Content-Type: text/plain; charset="utf-8" Add check for the return value of pcmcia_make_resource() to prevent null pointer dereference. Fixes: 49b1153adfe1 ("pcmcia: move all pcmcia_resource_ops providers into o= ne module") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li --- drivers/pcmcia/rsrc_iodyn.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pcmcia/rsrc_iodyn.c b/drivers/pcmcia/rsrc_iodyn.c index b04b16496b0c..2677b577c1f8 100644 --- a/drivers/pcmcia/rsrc_iodyn.c +++ b/drivers/pcmcia/rsrc_iodyn.c @@ -62,6 +62,9 @@ static struct resource *__iodyn_find_io_region(struct pcm= cia_socket *s, unsigned long min =3D base; int ret; =20 + if (!res) + return NULL; + data.mask =3D align - 1; data.offset =3D base & data.mask; =20 --=20 2.25.1