[Bug 235081] [scsi_cd]: panic with unreliable USB cable in r343190

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235081

Andriy Voskoboinyk <***@freebsd.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Keywords| |panic
Assignee|***@FreeBSD.org |***@FreeBSD.org
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235081

--- Comment #1 from Andriy Gapon <***@FreeBSD.org> ---
Please see bug 219857.
It also has a patch.
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Andriy Voskoboinyk <***@freebsd.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|New |Closed
Resolution|--- |DUPLICATE

--- Comment #2 from Andriy Voskoboinyk <***@freebsd.org> ---


*** This bug has been marked as a duplicate of bug 219857 ***
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--- Comment #3 from Andriy Voskoboinyk <***@freebsd.org> ---
Created attachment 201575
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=201575&action=edit
Panic backtrace (with patch applied)
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Andriy Voskoboinyk <***@freebsd.org> changed:

What |Removed |Added
----------------------------------------------------------------------------
Status|Closed |Open
Resolution|DUPLICATE |---

--- Comment #4 from Andriy Voskoboinyk <***@freebsd.org> ---
It's may be not patch-related, but another panic backtrace shows with it.
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Andriy Gapon <***@FreeBSD.org> changed:

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CC| |***@FreeBSD.org

--- Comment #5 from Andriy Gapon <***@FreeBSD.org> ---
TLDR version of the panic:

Feb 1 05:06:34 ThinkPad-X220 kernel: cd0 at umass-sim0 bus 0 scbus4 target 0
lun 0
Feb 1 05:06:34 ThinkPad-X220 kernel: cd0: <Linux File-CD Gadget 0310>
detached
...
Feb 1 05:08:03 ThinkPad-X220 kernel: Fatal trap 9: general protection fault
while in kernel mode
Feb 1 05:08:03 ThinkPad-X220 kernel: cpuid = 3; apic id = 03
Feb 1 05:08:03 ThinkPad-X220 kernel: instruction pointer =
0x20:0xffffffff8053052f
Feb 1 05:08:03 ThinkPad-X220 kernel: stack pointer =
0x28:0xfffffe0000546470
Feb 1 05:08:03 ThinkPad-X220 kernel: frame pointer =
0x28:0xfffffe0000546490
Feb 1 05:08:03 ThinkPad-X220 kernel: code segment = base 0x0,
limit 0xfffff, type 0x1b
Feb 1 05:08:03 ThinkPad-X220 kernel: = DPL 0, pres 1, long
1, def32 0, gran 1
Feb 1 05:08:03 ThinkPad-X220 kernel: processor eflags = interrupt enabled,
resume, IOPL = 0
Feb 1 05:08:03 ThinkPad-X220 kernel: current process = 7 (doneq0)
...
Feb 1 05:08:03 ThinkPad-X220 kernel: --- trap 0x9, rip = 0xffffffff8053052f,
rsp = 0xfffffe0000546470, rbp = 0xfffffe0000546490 ---
Feb 1 05:08:03 ThinkPad-X220 kernel: bioq_flush() at bioq_flush+0x5f/frame
0xfffffe0000546490
Feb 1 05:08:03 ThinkPad-X220 kernel: cddone() at cddone+0x4fe/frame
0xfffffe00005469e0
Feb 1 05:08:03 ThinkPad-X220 kernel: xpt_done_process() at
xpt_done_process+0x35f/frame 0xfffffe0000546a20
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