Public bug reported:
It seems that when reading /proc/<pid>/stack we can sometimes triggers a
panic on i386. This is triggered by an unsafe pointer access when
validating the stack in the stack unwinder. This is reproducible in a 4
cpu 32bit VM with the stress-ng /proc stressor.
** Affects: linux (Ubuntu)
Status: In Progress
** Changed in: linux (Ubuntu)
Status: New => In Progress
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[artful] panic in update_stack_state when reading /proc/<pid>/stack on
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