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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-08-10 11:20:12 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-10 11:33:09 +0200 |
| commit | a4e95fc2cbb31d70a65beffeaf8773f881328c34 (patch) | |
| tree | c0a00094c9c38bad5e09fd19fe23521c361177d7 | |
| parent | a044560c3a1f0ad75ce685c1ed7604820b9ed319 (diff) | |
| download | op-kernel-dev-a4e95fc2cbb31d70a65beffeaf8773f881328c34.zip op-kernel-dev-a4e95fc2cbb31d70a65beffeaf8773f881328c34.tar.gz | |
perf_counter: Require CAP_SYS_ADMIN for raw tracepoint data
Raw tracepoint data contains various kernel internals and
data from other users, so restrict this to CAP_SYS_ADMIN.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1249896452.17467.75.camel@twins>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/perf_counter.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index 5229d16..b0b20a0 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -3787,6 +3787,14 @@ static void tp_perf_counter_destroy(struct perf_counter *counter) static const struct pmu *tp_perf_counter_init(struct perf_counter *counter) { + /* + * Raw tracepoint data is a severe data leak, only allow root to + * have these. + */ + if ((counter->attr.sample_type & PERF_SAMPLE_RAW) && + !capable(CAP_SYS_ADMIN)) + return ERR_PTR(-EPERM); + if (ftrace_profile_enable(counter->attr.config)) return NULL; |
