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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2012-05-31 16:26:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-31 17:49:31 -0700
commite6315bb154e778391ce64b194756bd3d108dadf6 (patch)
tree6b0df724ed5e52058f61261d93f807ea0ee77d11 /ipc/mqueue.c
parent5b5c4d1a1440e94994c73dddbad7be0676cd8b9a (diff)
downloadlinux-e6315bb154e778391ce64b194756bd3d108dadf6.tar.bz2
mqueue: revert bump up DFLT_*MAX
Mqueue limitation is slightly naieve parameter likes other ipcs because unprivileged user can consume kernel memory by using ipcs. Thus, too aggressive raise bring us security issue. Example, current setting allow evil unprivileged user use 256GB (= 256 * 1024 * 1024*1024) and it's enough large to system will belome unresponsive. Don't do that. Instead, every admin should adjust the knobs for their own systems. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Doug Ledford <dledford@redhat.com> Acked-by: Joe Korty <joe.korty@ccur.com> Cc: Amerigo Wang <amwang@redhat.com> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Manfred Spraul <manfred@colorfullife.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/mqueue.c')
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