[Bug 2040113] Re: gdb crashes upon `run` on some arm64 machines

[Timo Aaltonen]

Hello Mate, or anyone else affected,

Accepted gdb into lunar-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/gdb/13.1-2ubuntu2.1 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-
lunar to verification-done-lunar. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-lunar. 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.

** Changed in: gdb (Ubuntu Lunar)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-lunar

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https://bugs.launchpad.net/bugs/2040113

Title:
  gdb crashes upon `run` on some arm64 machines

Status in gdb package in Ubuntu:
  Fix Released
Status in gdb source package in Lunar:
  Fix Committed

Bug description:
  [ Impact ]

   * gdb 13.1 as shipped in lunar is affected by a bug where it crashes upon `run` 
     on some arm64 machines (confirmed on Apple M-series, both under hypervisor 
     and bare metal, everything else with PAC should also be affected).

   * It was fixed upstream in gdb 13.2: https://inbox.sourceware.org/gdb- 
     patches/20230316103904.1947447-1-luis.machado at arm.com/.

   * Debian bookworm's gdb_13.1-3 also includes the same patch as `aarch64-pauth- 
     registers.patch`.

  [ Test Plan ]

   * This diff is confirmed to fix gdb 13.1 in lunar on my arm64 laptop.

   * This could be tested by running any program under lunar's gdb 
     on any ARM64 PAC machine.

  [ Where problems could occur ]

   * Problems aren't particularly likely as the exact patch was included in the 
     last Debian stable.

   * In theory, a gdb rebuild could possibly cause breakage.

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