[Qemu-devel] [Bug 1808565] [NEW] Reading /proc/self/task/<pid>/maps is not remapped to the target

[Alan Jones]

Public bug reported:

Seeing this in qemu-user 3.1.0

The code in is_proc_myself which supports remapping of /proc/self/maps
and /proc/<pid>/maps does not support remapping of
/proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
is_proc_myself to cover these cases causes the maps to be rewritten
correctly.

These are useful in multithreaded programs to avoid freezing the entire
program to capture the maps for a single tid.

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1808565

Title:
  Reading /proc/self/task/<pid>/maps is not remapped to the target

Status in QEMU:
  New

Bug description:
  Seeing this in qemu-user 3.1.0

  The code in is_proc_myself which supports remapping of /proc/self/maps
  and /proc/<pid>/maps does not support remapping of
  /proc/self/task/<pid>/maps or /proc/<pid>/task/<pid>/maps. Extending
  is_proc_myself to cover these cases causes the maps to be rewritten
  correctly.

  These are useful in multithreaded programs to avoid freezing the
  entire program to capture the maps for a single tid.

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