Robie,

pgrep and pkill are sharing the same code. Essentially pkill runs pgrep
and then issues a kill signal to the resulting pid. Therefore this fix
applies to both pkill and pgrep. Additionally, the source of the problem
comes from the behavior of `sysconf(_SC_ARG_MAX)` changing in newer
kernels. This function call only exists in one place in the procps
codebase, so no other commands are affected by the same issue.

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https://bugs.launchpad.net/bugs/1874824

Title:
  pgrep reports error "cannot allocate" when run without stack limit

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