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Message-ID: <20231107154846.3766119-22-sashal@kernel.org> Date: Tue, 7 Nov 2023 10:48:02 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Wenchao Hao <haowenchao2@...wei.com>, Simon Horman <horms@...nel.org>, "Martin K . Petersen" <martin.petersen@...cle.com>, Sasha Levin <sashal@...nel.org>, hare@...e.de, jejb@...ux.ibm.com, richardcochran@...il.com, linux-scsi@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 6.5 22/34] scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup() From: Wenchao Hao <haowenchao2@...wei.com> [ 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 <haowenchao2@...wei.com> Link: https://lore.kernel.org/r/20231011130350.819571-1-haowenchao2@huawei.com Reviewed-by: Simon Horman <horms@...nel.org> Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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 9c02c9523c4d4..ab06e9aeb613e 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -241,6 +241,12 @@ 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
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