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authorStephane Eranian <eranian@google.com>2013-05-21 12:53:37 +0200
committerIngo Molnar <mingo@kernel.org>2013-05-28 09:13:54 +0200
commit2b923c8f5de6722393e614b096d5040b6d4eaf98 (patch)
tree32d26494f93859f3a03a8aa6edc2cc3b97476191 /kernel/events
parent13acac307528c9cd7dd9fa9c577419401527b464 (diff)
downloadop-kernel-dev-2b923c8f5de6722393e614b096d5040b6d4eaf98.zip
op-kernel-dev-2b923c8f5de6722393e614b096d5040b6d4eaf98.tar.gz
perf/x86: Check branch sampling priv level in generic code
This patch moves commit 7cc23cd to the generic code: perf/x86/intel/lbr: Demand proper privileges for PERF_SAMPLE_BRANCH_KERNEL The check is now implemented in generic code instead of x86 specific code. That way we do not have to repeat the test in each arch supporting branch sampling. Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lkml.kernel.org/r/20130521105337.GA2879@quad Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 53d1b30..a0780b3 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6481,11 +6481,6 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
if (!(mask & ~PERF_SAMPLE_BRANCH_PLM_ALL))
return -EINVAL;
- /* kernel level capture: check permissions */
- if ((mask & PERF_SAMPLE_BRANCH_PERM_PLM)
- && perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
- return -EACCES;
-
/* propagate priv level, when not set for branch */
if (!(mask & PERF_SAMPLE_BRANCH_PLM_ALL)) {
@@ -6503,6 +6498,10 @@ static int perf_copy_attr(struct perf_event_attr __user *uattr,
*/
attr->branch_sample_type = mask;
}
+ /* kernel level capture: check permissions */
+ if ((mask & PERF_SAMPLE_BRANCH_KERNEL)
+ && perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
+ return -EACCES;
}
if (attr->sample_type & PERF_SAMPLE_REGS_USER) {
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