[Bug 216232] New: mysterious block devices are shown under /dev folder

[bugzilla-daemon@xxxxxxxxxx]

https://bugzilla.kernel.org/show_bug.cgi?id=216232

            Bug ID: 216232
           Summary: mysterious block devices are shown under /dev folder
           Product: SCSI Drivers
           Version: 2.5
    Kernel Version: 5.4.61
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: QLOGIC QLA2XXX
          Assignee: scsi_drivers-qla2xxx@xxxxxxxxxxxxxxxxxxxx
          Reporter: yshxxsjt715@xxxxxxxxx
        Regression: No

we are using linux kernel 5.4.61 and fibre channel card is qlogic's
ISP2722-based 16/32Gb adapter card.

the problem is that we are seeing some devices with lun 768 with size of 512B
shown under /dev folder. In the syslog we saw something like

Jul 10 17:00:08 hci01 kernel: [21675145.568997] scsi_io_completion_action: 24
callbacks suppressed
Jul 10 17:00:08 hci01 kernel: [21675145.569005] sd 6:0:0:768: [sdau] tag#1298
FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 10 17:00:08 hci01 kernel: [21675145.569011] sd 6:0:0:768: [sdau] tag#1298
Sense Key : Illegal Request [current]
Jul 10 17:00:08 hci01 kernel: [21675145.569015] sd 6:0:0:768: [sdau] tag#1298
Add. Sense: Logical block address out of range
Jul 10 17:00:08 hci01 kernel: [21675145.569019] sd 6:0:0:768: [sdau] tag#1298
CDB: Read(10) 28 00 00 00 00 00 00 00 01 00
Jul 10 17:00:08 hci01 kernel: [21675145.569021] print_req_error: 24 callbacks
suppressed
Jul 10 17:00:08 hci01 kernel: [21675145.569025] blk_update_request: critical
target error, dev sdau, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 1 prio
class 0
Jul 10 17:00:08 hci01 kernel: [21675145.601879] sd 6:0:0:768: [sdau] tag#1299
FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 10 17:00:08 hci01 kernel: [21675145.601883] sd 6:0:0:768: [sdau] tag#1299
Sense Key : Illegal Request [current]
Jul 10 17:00:08 hci01 kernel: [21675145.601886] sd 6:0:0:768: [sdau] tag#1299
Add. Sense: Logical block address out of range
Jul 10 17:00:08 hci01 kernel: [21675145.601888] sd 6:0:0:768: [sdau] tag#1299
CDB: Read(10) 28 00 00 00 00 00 00 00 01 00
Jul 10 17:00:08 hci01 kernel: [21675145.601891] blk_update_request: critical
target error, dev sdau, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class
0
Jul 10 17:00:08 hci01 kernel: [21675145.604213] buffer_io_error: 22 callbacks
suppressed
Jul 10 17:00:08 hci01 kernel: [21675145.604215] Buffer I/O error on dev sdau,
logical block 0, async page read
Jul 10 17:00:08 hci01 kernel: [21675145.634149] sd 6:0:0:768: [sdau] tag#1300
FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 10 17:00:08 hci01 kernel: [21675145.634152] sd 6:0:0:768: [sdau] tag#1300
Sense Key : Illegal Request [current]
Jul 10 17:00:08 hci01 kernel: [21675145.634155] sd 6:0:0:768: [sdau] tag#1300
Add. Sense: Logical block address out of range
Jul 10 17:00:08 hci01 kernel: [21675145.634158] sd 6:0:0:768: [sdau] tag#1300
CDB: Read(10) 28 00 00 00 00 00 00 00 01 00

here, the lun id of 768 does not exist on SAN but when I try to manually delete
it, after some seconds it still appears.

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