[Bug 252575] panic: camq_remove: Attempt to remove out-of-bounds index -2 from queue

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252575

--- Comment #2 from Peter Eriksson <pen at lysator.liu.se> ---
With FreeBSD 12.2-STABLE I get a gazillion "ciss0: WARNING: completing non-busy
request" but no panic (yet).

I managed to get some SCSI errors too which probably is related:

(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 10 a6 1a 70 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:44,0 (Internal target
failure)
(da11:ciss0:32:27:0): Info: 0x310a61b48
(da11:ciss0:32:27:0): Field Replaceable Unit: 67
(da11:ciss0:32:27:0): Descriptor 0x80: f7 43
(da11:ciss0:32:27:0): Descriptor 0x81: 03 cd 21 01 00 d0
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 11 d2 4d 60 00 00 00 e8
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:44,0 (Internal target
failure)
(da11:ciss0:32:27:0): Info: 0x311d24dc0
(da11:ciss0:32:27:0): Field Replaceable Unit: 67
(da11:ciss0:32:27:0): Descriptor 0x80: f7 43
(da11:ciss0:32:27:0): Descriptor 0x81: 03 cf 0f 01 00 21
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 11 df 48 78 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:11,3 (Multiple read
errors)
(da11:ciss0:32:27:0): Info: 0x311df4898
(da11:ciss0:32:27:0): Field Replaceable Unit: 66
(da11:ciss0:32:27:0): Descriptor 0x80: f7 42
(da11:ciss0:32:27:0): Descriptor 0x81: 03 ce 0c 01 00 60
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 11 e4 6e f8 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:11,3 (Multiple read
errors)
(da11:ciss0:32:27:0): Info: 0x311e46f20
(da11:ciss0:32:27:0): Field Replaceable Unit: 66
(da11:ciss0:32:27:0): Descriptor 0x80: f7 42
(da11:ciss0:32:27:0): Descriptor 0x81: 03 cd a6 01 00 15
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 13 07 b2 28 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:11,3 (Multiple read
errors)
(da11:ciss0:32:27:0): Info: 0x31307b2d8
(da11:ciss0:32:27:0): Field Replaceable Unit: 66
(da11:ciss0:32:27:0): Descriptor 0x80: f7 42
(da11:ciss0:32:27:0): Descriptor 0x81: 03 d0 09 01 01 26
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 13 09 ec 68 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:11,3 (Multiple read
errors)
(da11:ciss0:32:27:0): Info: 0x31309ec98
(da11:ciss0:32:27:0): Field Replaceable Unit: 66
(da11:ciss0:32:27:0): Descriptor 0x80: f7 42
(da11:ciss0:32:27:0): Descriptor 0x81: 03 cf dd 01 01 5d
(da11:ciss0:32:27:0): Error 5, Unretryable error
(da11:ciss0:32:27:0): READ(16). CDB: 88 00 00 00 00 03 13 0e dc 80 00 00 01 00
00 00 
(da11:ciss0:32:27:0): CAM status: SCSI Status Error
(da11:ciss0:32:27:0): SCSI status: Check Condition
(da11:ciss0:32:27:0): SCSI sense: ABORTED COMMAND asc:11,3 (Multiple read
errors)
(da11:ciss0:32:27:0): Info: 0x3130edcd0
(da11:ciss0:32:27:0): Field Replaceable Unit: 66
(da11:ciss0:32:27:0): Descriptor 0x80: f7 42
(da11:ciss0:32:27:0): Descriptor 0x81: 03 cf 7b 01 00 72
(da11:ciss0:32:27:0): Error 5, Unretryable error

I've now zpool offline'd that disk from the zpool in question so hopefully this
night things will behave better. Still think that panic shouldn't have
happened.

And perhaps one should have some kind of throttle on the kernel printed
WARNINGS - then machine because more or less unusable while it was printing
them (was watching them via ipmi/serial).

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