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authorNeil Horman <nhorman@tuxdriver.com>2009-09-23 18:56:56 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-24 10:21:00 -0400
commita293980c2e261bd5b0d2a77340dd04f684caff58 (patch)
tree69f2b2747548deafb146c18953ebce21ae1f02d4 /mm/init-mm.c
parent725eae32df7754044809973034429a47e6035158 (diff)
exec: let do_coredump() limit the number of concurrent dumps to pipes
Introduce core pipe limiting sysctl. Since we can dump cores to pipe, rather than directly to the filesystem, we create a condition in which a user can create a very high load on the system simply by running bad applications. If the pipe reader specified in core_pattern is poorly written, we can have lots of ourstandig resources and processes in the system. This sysctl introduces an ability to limit that resource consumption. core_pipe_limit defines how many in-flight dumps may be run in parallel, dumps beyond this value are skipped and a note is made in the kernel log. A special value of 0 in core_pipe_limit denotes unlimited core dumps may be handled (this is the default value). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reported-by: Earl Chew <earl_chew@agilent.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Andi Kleen <andi@firstfloor.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/init-mm.c')
0 files changed, 0 insertions, 0 deletions