[SRU] Set default file_bigendian in struct tep_handle

[Pragyansh Chaturvedi]

[ Impact ]

 * This relates to https://bugs.launchpad.net/ubuntu/+source/libtracefs/+bug/2062118.
   The failures on s390x are primarily because tep_alloc sets file
   endianness to LITTLE_ENDIAN by default (with no checks)

 * The changes are already accepted into plucky and upstream:
   https://code.launchpad.net/~r41k0u/ubuntu/+source/libtraceevent/+git/libtraceevent/+merge/477042

 * This will fix autopkgtest segfaults of libtracefs on oracular and noble for s390x.

[ Test Plan ]

 * Clone libtracefs (oracular-devel or noble-devel), compile it and the tests (make && make test),
   then run the tests as root (utest/trace-utest), on an s390x machine (running oracular or noble)

 * You can test the fix by installing the patched version of libtraceevent for the release you are
   testing and trying the libtracefs tests again.

[ Where problems could occur ]

 * This is not likely to break anything, as we can make a safe assumption
   to set file_bigendian to the same value as host_bigendian by default.
   If these are different, the user can set it using event-parse-api

 * In any case, this change seems logical. This does not affect any other
   little-endian architectures, and I think this won't be breaking any workarounds
   people did around this problem.

 * But in case we have some regressions as a result of this change, then there surely would
   be some workaround to this in a patch, which can then be reverted.

[ Other Info ]

 * This does not fix anything in libtraceevent but does fix the tests for libtracefs on s390x.
   But I have opened this bug against libtraceevent.

 * I see a workaround around this problem in the last patch in d/p/series, but this change does not affect
   it

[Timo Aaltonen (tjaalton)]

Hello Pragyansh, or anyone else affected,

Accepted libtraceevent into oracular-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/libtraceevent/1:1.8.2-1ubuntu3.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-oracular to verification-done-oracular. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-oracular. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Timo Aaltonen (tjaalton)]

Hello Pragyansh, or anyone else affected,

Accepted libtraceevent into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/libtraceevent/1:1.8.2-1ubuntu2.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-noble. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted libtraceevent (1:1.8.2-1ubuntu3.1) for oracular have finished running.
The following regressions have been reported in tests triggered by the package:

linux-realtime/6.11.0-1008.8 (amd64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/oracular/update_excuses.html#libtraceevent

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

[Ubuntu SRU Bot (ubuntu-sru-bot)]

All autopkgtests for the newly accepted libtraceevent (1:1.8.2-1ubuntu2.1) for noble have finished running.
The following regressions have been reported in tests triggered by the package:

libtracefs/1.8.0-1ubuntu1 (arm64)
linux-azure-6.11/6.11.0-1012.12~24.04.1 (amd64, arm64)
linux-hwe-6.11/6.11.0-24.24~24.04.1 (amd64, arm64, s390x)
linux-lowlatency-hwe-6.11/6.11.0-1011.12~24.04.1 (amd64, arm64)
linux-nvidia/6.8.0-1026.29 (arm64)
linux-nvidia-lowlatency/6.8.0-1024.27.1 (arm64)
linux-realtime/6.8.1-1015.16 (amd64)
linux-xilinx/6.8.0-1014.15 (arm64)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/noble/update_excuses.html#libtraceevent

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!