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[Jacob Martin <2071749@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Seen on N-nvidia 6.8.0-1008.8 and 6.8.0-1009.9. I was also able to
reproduce this on N-generic 6.8.0-36.

Observed on nodes: akis, blanka, gunyolk, hidon, and hinyari. Both arm64
and amd64. The test fails most of the time, but not every time.

02:44:19 DEBUG| [stdout] PASSED (CONFIG_BLK_DEV_IO_TRACE=y in /boot/config-6.8.0-1009-nvidia)
02:44:20 DEBUG| [stdout] 
02:44:20 DEBUG| [stdout] Using block device /dev/loop0 for path /home/ubuntu/autotest/client/results/default/ubuntu_blktrace_smoke_test.blktrace-smoke-test/mnt
02:44:20 DEBUG| [stdout] 
02:44:20 DEBUG| [stdout] Test regime:
02:44:20 DEBUG| [stdout]   dd performing 65536 1K block writes
02:44:20 DEBUG| [stdout]   looking for at least 1024 blktrace events
02:44:21 DEBUG| [stdout] 
02:44:21 DEBUG| [stdout] Wed Jun 26 02:44:21 UTC 2024: blktrace starting
02:44:21 DEBUG| [stdout] Wed Jun 26 02:44:21 UTC 2024: dd starting
02:44:26 DEBUG| [stdout] Wed Jun 26 02:44:26 UTC 2024: dd stopped
02:44:26 DEBUG| [stdout] Wed Jun 26 02:44:26 UTC 2024: waiting for 10 seconds
02:44:36 DEBUG| [stdout] Wed Jun 26 02:44:36 UTC 2024: blktrace being terminated
02:44:37 DEBUG| [stdout] Wed Jun 26 02:44:37 UTC 2024: blktrace terminated
02:44:37 ERROR| [stderr] *** buffer overflow detected ***: terminated
02:44:38 ERROR| [stderr] /home/ubuntu/autotest/client/tests/ubuntu_blktrace_smoke_test/ubuntu_blktrace_smoke_test.sh: line 169:  8356 Broken pipe             cat $TMPFILE
02:44:38 ERROR| [stderr]       8357 Aborted                 (core dumped) | blkparse -i - > ${TMPFILE}.parsed
02:44:38 DEBUG| [stdout] Wed Jun 26 02:44:38 UTC 2024: blktrace data parsed
02:44:38 DEBUG| [stdout] 
02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block traces events from the dd process, got 509)
02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block read traces events, got 0)
02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block write traces events, got 0)
02:44:38 DEBUG| [stdout] 
02:44:38 DEBUG| [stdout] Summary: 1 passed, 3 failed

** Affects: ubuntu-kernel-tests
     Importance: Undecided
         Status: New


** Tags: noble sru-20240429 sru-20240610

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https://bugs.launchpad.net/bugs/2071749

Title:
  ubuntu_blktrace_smoke_test.blktrace-smoke-test fails with "*** buffer
  overflow detected ***: terminated" on Noble

Status in ubuntu-kernel-tests:
  New

Bug description:
  Seen on N-nvidia 6.8.0-1008.8 and 6.8.0-1009.9. I was also able to
  reproduce this on N-generic 6.8.0-36.

  Observed on nodes: akis, blanka, gunyolk, hidon, and hinyari. Both
  arm64 and amd64. The test fails most of the time, but not every time.

  02:44:19 DEBUG| [stdout] PASSED (CONFIG_BLK_DEV_IO_TRACE=y in /boot/config-6.8.0-1009-nvidia)
  02:44:20 DEBUG| [stdout] 
  02:44:20 DEBUG| [stdout] Using block device /dev/loop0 for path /home/ubuntu/autotest/client/results/default/ubuntu_blktrace_smoke_test.blktrace-smoke-test/mnt
  02:44:20 DEBUG| [stdout] 
  02:44:20 DEBUG| [stdout] Test regime:
  02:44:20 DEBUG| [stdout]   dd performing 65536 1K block writes
  02:44:20 DEBUG| [stdout]   looking for at least 1024 blktrace events
  02:44:21 DEBUG| [stdout] 
  02:44:21 DEBUG| [stdout] Wed Jun 26 02:44:21 UTC 2024: blktrace starting
  02:44:21 DEBUG| [stdout] Wed Jun 26 02:44:21 UTC 2024: dd starting
  02:44:26 DEBUG| [stdout] Wed Jun 26 02:44:26 UTC 2024: dd stopped
  02:44:26 DEBUG| [stdout] Wed Jun 26 02:44:26 UTC 2024: waiting for 10 seconds
  02:44:36 DEBUG| [stdout] Wed Jun 26 02:44:36 UTC 2024: blktrace being terminated
  02:44:37 DEBUG| [stdout] Wed Jun 26 02:44:37 UTC 2024: blktrace terminated
  02:44:37 ERROR| [stderr] *** buffer overflow detected ***: terminated
  02:44:38 ERROR| [stderr] /home/ubuntu/autotest/client/tests/ubuntu_blktrace_smoke_test/ubuntu_blktrace_smoke_test.sh: line 169:  8356 Broken pipe             cat $TMPFILE
  02:44:38 ERROR| [stderr]       8357 Aborted                 (core dumped) | blkparse -i - > ${TMPFILE}.parsed
  02:44:38 DEBUG| [stdout] Wed Jun 26 02:44:38 UTC 2024: blktrace data parsed
  02:44:38 DEBUG| [stdout] 
  02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block traces events from the dd process, got 509)
  02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block read traces events, got 0)
  02:44:38 DEBUG| [stdout] FAILED (expecting at least 1024 block write traces events, got 0)
  02:44:38 DEBUG| [stdout] 
  02:44:38 DEBUG| [stdout] Summary: 1 passed, 3 failed

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