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[Luciano Chavez <1442180@xxxxxxxxxxxxxxxxxx>]

** Package changed: ubuntu => linux (Ubuntu)

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Taco Screen team (taco-screen-team)

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https://bugs.launchpad.net/bugs/1442180

Title:
  powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH

  We cap 32bit userspace backtraces to PERF_MAX_STACK_DEPTH
  (currently 127), but we forgot to do the same for 64bit backtraces.

  If userspace creates a stack frame that points to itself we will
  loop forever in the backtrace code with interrupts off.

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