target/pscsi: Fix NULL pointer dereference in get_device_type
commit 215a8fe4198f607f34ecdbc9969dae783d8b5a61 upstream. 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> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1112,7 +1112,7 @@ static u32 pscsi_get_device_type(struct se_device *dev)
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struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
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struct scsi_device *sd = pdv->pdv_sd;
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return sd->type;
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return (sd) ? sd->type : TYPE_NO_LUN;
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}
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static sector_t pscsi_get_blocks(struct se_device *dev)
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