4.19-stable review patch. If anyone has any objections, please let me know.
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From: Wenchao Hao haowenchao2@huawei.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@huawei.com Link: https://lore.kernel.org/r/20231011130350.819571-1-haowenchao2@huawei.com Reviewed-by: Simon Horman horms@kernel.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.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 f653109d56af0..f84c8a9846abb 100644 --- a/drivers/scsi/libfc/fc_lport.c +++ b/drivers/scsi/libfc/fc_lport.c @@ -250,6 +250,12 @@ 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;