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 A1530315AC for ; Tue, 7 Nov 2023 15:54:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Xa7lqDg7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2D92C433C8; Tue, 7 Nov 2023 15:54:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699372457; bh=J1cl4VLlggtWGKCXPlAmweUwsFMs27HktKbrOPGvOIk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Xa7lqDg73yNyhfNKfgQkTgIyS3FreoCuaHs6U+rnkR9nu5BDzaKuMisG10D30+2yk qmBKyLRcWheessSkSmR51Yby3L6RFsGj+bG5YjtFvQPExn6yTtvKE+axV7BkohdxSH XkHAkBpBnwgEZAvwCa0rjrEefjd0K9lGzpmgr066kIli0SOECjYUGknSpI58pzGLLx tS78z3m5iNJbtzIPeCGnZ2k+AzHrbcTytvqoazgWxM2ih91O6fzEYHlQ0i5wv8/7Em Ifoq6bAvdu+0MDcvC0ZJY12F3OFnuhLD40JI4/b84v2o4FyBS0e00YK6C0n0B6Rus/ ou0khU56JxwJQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Wenchao Hao , Simon Horman , "Martin K . Petersen" , Sasha Levin , hare@suse.de, jejb@linux.ibm.com, richardcochran@gmail.com, linux-scsi@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 11/12] scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup() Date: Tue, 7 Nov 2023 10:53:29 -0500 Message-ID: <20231107155343.3768464-11-sashal@kernel.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231107155343.3768464-1-sashal@kernel.org> References: <20231107155343.3768464-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.4.259 Content-Transfer-Encoding: 8bit From: Wenchao Hao [ Upstream commit 4df105f0ce9f6f30cda4e99f577150d23f0c9c5f ] fc_lport_ptp_setup() did not check the return value of fc_rport_create() which can return NULL and would cause a NULL pointer dereference. Address this issue by checking return value of fc_rport_create() and log error message on fc_rport_create() failed. Signed-off-by: Wenchao Hao Link: https://lore.kernel.org/r/20231011130350.819571-1-haowenchao2@huawei.com Reviewed-by: Simon Horman Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/libfc/fc_lport.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c index 9399e1455d597..97087eef05dbc 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -238,6 +238,12 @@ static void fc_lport_ptp_setup(struct fc_lport *lport, } mutex_lock(&lport->disc.disc_mutex); lport->ptp_rdata = fc_rport_create(lport, remote_fid); + if (!lport->ptp_rdata) { + printk(KERN_WARNING "libfc: Failed to setup lport 0x%x\n", + lport->port_id); + mutex_unlock(&lport->disc.disc_mutex); + return; + } kref_get(&lport->ptp_rdata->kref); lport->ptp_rdata->ids.port_name = remote_wwpn; lport->ptp_rdata->ids.node_name = remote_wwnn; -- 2.42.0