From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC5DD1DE8AF; Sun, 7 Sep 2025 20:32:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757277127; cv=none; b=nR/T+yWyer1lbhPOb/mILPoWEmfu0uX29HVuxWiqz97jCf8lockgO7wM41CGx48YW0xoimlZgWgXnRGw0Nvg8CY9RkAWQVzcTJlm0RxxJN/wCGe6JR2hZKacHeec3WcONxgtzAJma8lrhfXOdnLj9FRZxkoBJZ4a15lpZROImnc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757277127; c=relaxed/simple; bh=QKTvp+m8tTkXOlu8p5+MZ/mEqq0TzZfOaFy35y6TNgs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=M2n+xhgyTcYjWzmUJj3zC3Zo/nSoXiuPO2DRh3GqvpoE3M4TjVXLP0ZJtiXVWhdtWnco0SQhddeiqQ4O4ntGhkaU03/RPxwpIFxJ9V+bINFt0lskbiqOxwAfF86RvJ4j6gh8ajCUmmOljKV7vGnG/JeehATn1ZgTIhQHt/nhs/s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=N8ppNrqm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="N8ppNrqm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 23948C4CEF0; Sun, 7 Sep 2025 20:32:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1757277127; bh=QKTvp+m8tTkXOlu8p5+MZ/mEqq0TzZfOaFy35y6TNgs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N8ppNrqmun5qLIIVyiWNcJTA/AHnsRt9O+btQ0u6AQXxLMa0ivNc67owI42v+vbuV W8vxNMwMbWjFEsSwvE/MeuC3x53tEpMZePd3em5B/w25A9YObgFM0ALQn0YsbMFRPZ VEYkPKvOrYu/TBCwxLoZ3yAG5eOdagU84GA0toVw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ma Ke , Dominik Brodowski Subject: [PATCH 6.12 095/175] pcmcia: Fix a NULL pointer dereference in __iodyn_find_io_region() Date: Sun, 7 Sep 2025 21:58:10 +0200 Message-ID: <20250907195617.094018928@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250907195614.892725141@linuxfoundation.org> References: <20250907195614.892725141@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke commit 44822df89e8f3386871d9cad563ece8e2fd8f0e7 upstream. In __iodyn_find_io_region(), pcmcia_make_resource() is assigned to res and used in pci_bus_alloc_resource(). There is a dereference of res in pci_bus_alloc_resource(), which could lead to a NULL pointer dereference on failure of pcmcia_make_resource(). Fix this bug by adding a check of res. Cc: stable@vger.kernel.org Fixes: 49b1153adfe1 ("pcmcia: move all pcmcia_resource_ops providers into one module") Signed-off-by: Ma Ke Signed-off-by: Dominik Brodowski Signed-off-by: Greg Kroah-Hartman --- drivers/pcmcia/rsrc_iodyn.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/pcmcia/rsrc_iodyn.c +++ b/drivers/pcmcia/rsrc_iodyn.c @@ -62,6 +62,9 @@ static struct resource *__iodyn_find_io_ unsigned long min = base; int ret; + if (!res) + return NULL; + data.mask = align - 1; data.offset = base & data.mask;