[Crash-utility] task: recursive temporary file usage

[Dave Anderson]

> Hi,
>
> If I try to print a non-existing member of task_struct with foreach, I get
> expected error messages:
>
>  crash> foreach task -R invalid
>  PID: 0      TASK: 806d9d30  CPU: 0   COMMAND: "swapper/0"
>  task: invalid: not a task_struct or thread_info member
>
>  PID: 0      TASK: 8fce2808  CPU: 1   COMMAND: "swapper/1"
>  task: invalid: not a task_struct or thread_info member
>
>  PID: 1      TASK: 8fc9c768  CPU: 0   COMMAND: "systemd"
>  task: invalid: not a task_struct or thread_info member
>
> But, if I try to do this with a non-existing submember of an existing
> member, I get 'recursive temporary file usage':
>
>  crash> foreach task -R se.invalid
>  PID: 0      TASK: 806d9d30  CPU: 0   COMMAND: "swapper/0"
>  task: invalid data structure member reference: se.invalid
>  task: recursive temporary file usage
>  task: recursive temporary file usage
>  task: recursive temporary file usage
>  task: recursive temporary file usage
>
> This is with the the latest crash from git.  I think this started from
> the patches which introduced the deep-printing of structures.  I haven't
> investigated further yet, though.

It's because that new parse_for_member_extended() function does the
error(FATAL) call while within a open_tmpfile()/close_tmpfile() section.

Dave

>
> Thanks.
>
> /Rabin
>
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