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From: "sstewartgallus00 at mylangara dot bc.ca" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/17204] New: race condition in nice
Date: Sun, 27 Jul 2014 04:39:00 -0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=17204

            Bug ID: 17204
           Summary: race condition in nice
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: sstewartgallus00 at mylangara dot bc.ca
                CC: drepper.fsp at gmail dot com

nice is implemented as calling getpriority and than setting the priority as
higher and than calling getpriority again but this is racy as other tasks can
call setpriority concurrently. This bug probably doesn't actually cause any
problems but it could still be fixed. Fixing this bug would also reduce the
amount of system calls by one which would be nice. Glibc should not call
getpriority to get the new value of the priority after.

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