From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> [ Upstream commit 215a8fe4198f607f34ecdbc9969dae783d8b5a61 ] This patch fixes a NULL pointer dereference OOPs with pSCSI backends within target_core_stat.c code. The bug is caused by a configfs attr read if no pscsi_dev_virt->pdv_sd has been configured. Reported-by: Olaf Hering <olaf@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/target/target_core_pscsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 7c8291f..9a54381 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -1120,7 +1120,7 @@ static u32 pscsi_get_device_type(struct se_device *dev) struct pscsi_dev_virt *pdv = PSCSI_DEV(dev); struct scsi_device *sd = pdv->pdv_sd; - return sd->type; + return (sd) ? sd->type : TYPE_NO_LUN; } static sector_t pscsi_get_blocks(struct se_device *dev) -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html