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[Po-Hsu Lin <2045967@xxxxxxxxxxxxxxxxxx>]

This can be found failing on T-3.13.0-197.248

** Tags added: 3.13

** Tags added: sru-s20240205

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Title:
  pipe15 from ubuntu_ltp_syscalls failed with T-lts / X

Status in ubuntu-kernel-tests:
  New

Bug description:
  This issue pops up after updating to the latest tip of LTP test suite
  (commit 776b57984 "rwtest: Remove df symlink check")

  This is a new test case added in this Nov. https://github.com/linux-
  test-project/ltp/commit/4e3bb6b7baa462056c890134e9deef0cd343463b

  It's only failing with T-lts (4.4.0-248.282~14.04.1) and X
  (4.4.0-248.282).

  Test log:
  INFO: Test start time: Wed Dec  6 08:44:46 UTC 2023
  COMMAND:    /opt/ltp/bin/ltp-pan -q  -e -S   -a 17743     -n 17743  -f /tmp/ltp-sAlLAYWC1I/alltests -l /dev/null  -C /dev/null -T /dev/null
  LOG File: /dev/null
  FAILED COMMAND File: /dev/null
  TCONF COMMAND File: /dev/null
  Running tests.......
  tst_test.c:1690: TINFO: LTP version: 20230929
  tst_test.c:1576: TINFO: Timeout per run is 0h 00m 30s
  pipe15.c:57: TINFO: Soft limit for pipes: 16384 pages
  pipe15.c:58: TINFO: Buffer size: 65536 byte
  pipe15.c:59: TINFO: Creating 1024 pipes
  pipe15.c:34: TINFO: Soft-limited buffer size: 4096 bytes
  Test timeouted, sending SIGKILL!
  tst_test.c:1629: TINFO: If you are running on slow machine, try exporting LTP_TIMEOUT_MUL > 1
  tst_test.c:1630: TBROK: Test killed! (timeout?)

  HINT: You _MAY_ be missing kernel fixes:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=46c4c9d1beb7
  INFO: ltp-pan reported some tests FAIL
  LTP Version: 20230929
  INFO: Test end time: Wed Dec  6 08:45:16 UTC 2023

  I can't find commit 46c4c9d1beb7 in our 4.4 kernel tree.

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