https://bugs.kde.org/show_bug.cgi?id=378268
Bug ID: 378268
Summary: ksysguardd eats filehandles, quits when 1023 are used
up.
Product: ksysguard
Version: unspecified
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: ksysguardd
Assignee: ksysguard-b...@kde.org
Reporter: reisenwe...@web.de
Target Milestone: ---
Created attachment 104811
--> https://bugs.kde.org/attachment.cgi?id=104811&action=edit
strace log of last two pipe() and clone() calls before +++ exited with 1 +++
pipe(0x7fff1904da90) = -1 EMFILE (Too many open files)
[2017-03-30 Thu 11:35:12] <DocScrutinizer05> hmm, obviously ksysguardd cteates
a pipe (2 filehandles), then clones a child, closes write side of pipe, tries
reading from end of pipe, and eventually does same again, while read side of
pipe stays open
[2017-03-30 Thu 11:37:21] <DocScrutinizer05> I guess the ksysguardd parent
eventually should close its side of the pipe, no?
[2017-03-30 Thu 11:38:19] <DocScrutinizer05> I can't think of it really
intentionally trying to spawn >1023 children with a pipe to each one
[2017-03-30 Thu 11:39:17] <DocScrutinizer05> heck, on some systems the process
table isn't large enough for 1024 processes ;-)
[2017-03-30 Thu 11:44:01] <DocScrutinizer05> http://paste.opensuse.org/4123994
there's no `close(1021)` ever, after the `pipe([1021, 1022])`
[2017-03-30 Thu 11:48:19] <DocScrutinizer05> so of course next sequence looks
like http://paste.opensuse.org/46086581
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