Messages in this thread Patch in this message | | | Date | Fri, 10 Feb 2017 00:33:53 -0800 | From | tip-bot for Alexander Shishkin <> | Subject | [tip:perf/core] perf/core: Do error out on a kernel filter on an exclude_filter event |
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Commit-ID: 9ccbfbb157a38921702402281ca7be530b4c3669 Gitweb: http://git.kernel.org/tip/9ccbfbb157a38921702402281ca7be530b4c3669 Author: Alexander Shishkin <alexander.shishkin@linux.intel.com> AuthorDate: Thu, 26 Jan 2017 11:40:56 +0200 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Fri, 10 Feb 2017 09:08:09 +0100
perf/core: Do error out on a kernel filter on an exclude_filter event
It is currently possible to configure a kernel address filter for a event that excludes kernel from its traces (attr.exclude_kernel==1).
While in reality this doesn't make sense, the SET_FILTER ioctl() should return a error in such case, currently it does not. Furthermore, it will still silently discard the filter and any potentially valid filters that came with it.
This patch makes the SET_FILTER ioctl() error out in such cases.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Will Deacon <will.deacon@arm.com> Cc: vince@deater.net Link: http://lkml.kernel.org/r/20170126094057.13805-3-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> --- kernel/events/core.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/events/core.c b/kernel/events/core.c index 88676ff..1730995 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -8260,6 +8260,7 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr, * attribute. */ if (state == IF_STATE_END) { + ret = -EINVAL; if (kernel && event->attr.exclude_kernel) goto fail;
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