Bug 201481 - pktcdvd: invalid opcode 0000 kernel BUG in pkt_make_request
Summary: pktcdvd: invalid opcode 0000 kernel BUG in pkt_make_request
Status: NEW
Alias: None
Product: IO/Storage
Classification: Unclassified
Component: Block Layer (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Jens Axboe
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-10-21 20:54 UTC by Christopher Chavez
Modified: 2020-09-03 15:01 UTC (History)
1 user (show)

See Also:
Kernel Version: 4.15
Subsystem:
Regression: No
Bisected commit-id:

Attachments
dmesg for 4.19-rc7 (3.24 KB, text/plain)
2018-10-21 20:54 UTC, Christopher Chavez 		Details
dmesg for 4.15.0-38 (Ubuntu) (3.31 KB, text/plain)
2018-10-21 20:55 UTC, Christopher Chavez 		Details
dmesg from kernel 5.3.0 (5.31 KB, text/plain)
2020-09-03 07:03 UTC, martin.konopka 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Christopher Chavez 2018-10-21 20:54:51 UTC 
Created attachment 279115 [details]
dmesg for 4.19-rc7

(Please feel free to adjust the category to something more appropriate.)

After using pktsetup to set up a pktcdvd device and mounting it (as described by the example in its man page), once there is a change to be written, this kernel BUG appears a moment later, and the pktcdvd device is no longer responsive.

Reproduced on i386 and amd64, using mainline kernel 4.19-rc7 as well as Ubuntu kernel 4.15.0-38.
Comment 1 Christopher Chavez 2018-10-21 20:55:47 UTC 
Created attachment 279117 [details]
dmesg for 4.15.0-38 (Ubuntu)
Comment 2 martin.konopka 2020-09-03 07:03:36 UTC 
Created attachment 292313 [details]
dmesg from kernel 5.3.0
Comment 3 martin.konopka 2020-09-03 07:05:03 UTC 
The problem persists for kernel 5.3.0 (Ubuntu), see dmesg attachment and for kernel 5.4.0 (ubuntu). Since this was reported a few years ago, i doubt it is specific to distribution kernels.
Comment 4 Jens Axboe 2020-09-03 15:01:58 UTC 
Unfortunately I do not have the hardware to debug this, and nobody else is maintaining it. At this point I think we should just remove the driver.
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