| commit | 6bb56347f5162d1a7cb1dc461023360781ecd4c0 | |
| author | Ingo Molnar <mingo@elte.hu> | |
| Fri, 28 Aug 2009 11:44:53 +0000 (28 13:44 +0200) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Fri, 28 Aug 2009 11:44:53 +0000 (28 13:44 +0200) | ||
| tree | a2f1926c1ad68da16e05a2586645ca3de20ab7c5 | treesnapshot (tar.gz zip) |
| parent | 326ba5010a5429a5a528b268b36a5900d4ab0eba | commitdiff |
perf_counters: Increase paranoia level
Per-cpu counters are an ASLR information leak as they show
the execution other tasks do. Increase the paranoia level
to 1, which disallows per-cpu counters. (they still allow
counting/profiling of own tasks - and admin can profile
everything.)
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Per-cpu counters are an ASLR information leak as they show
the execution other tasks do. Increase the paranoia level
to 1, which disallows per-cpu counters. (they still allow
counting/profiling of own tasks - and admin can profile
everything.)
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| kernel/perf_counter.c | diffblobblamehistory |