[Bug libc/25596] New: Investigate atomicity of sigsuspend/sigpause

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25596

            Bug ID: 25596
           Summary: Investigate atomicity of sigsuspend/sigpause
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---
             Flags: security-

We have received a downstream bug report that sigsuspend/sigpause are not
atomic.

This needs further investigation. It is likely that sigpause (which takes a
signal number) cannot be implemented properly with kernel support. sigsuspend
should work today as expected.

The Austin Group has clarified that atomicity is required for both functions:
https://www.austingroupbugs.net/view.php?id=1201

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