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target/pscsi: Fix NULL pointer dereference in get_device_type 

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@aepfle.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
hifive-unleashed-5.1
Nicholas Bellinger 2015-02-27 03:54:13 -08:00
parent d556546e7e
commit 215a8fe419
1 changed files with 1 additions and 1 deletions
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2
drivers/target/target_core_pscsi.c
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@ -1121,7 +1121,7 @@ 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)