Public bug reported:
It turns out that a shared mmap'd altstack is a really bad idea as it
can be clobbered by child and parent causing segfaults on the return
path out of the handler. Make the altstack privately mapped.
** Affects: stress-ng (Ubuntu)
Importance: High
Assignee: Colin Ian King (colin-king)
Status: In Progress
** Changed in: stress-ng (Ubuntu)
Importance: Undecided => High
** Changed in: stress-ng (Ubuntu)
Status: New => In Progress
** Changed in: stress-ng (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1845464
Title:
stack stressor can segfault because of shared alternative stack in
sighandler
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