Messages in this thread Patch in this message |  | | | Date | Sat, 8 May 2010 16:10:36 GMT | | From | tip-bot for Cyrill Gorcunov <> | | Subject | [tip:perf/core] x86, perf: P4 PMU -- check for proper event index in RAW events |
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Commit-ID: c7993165ef0c1d636ca05f4787739f8414584e6d Gitweb: http://git.kernel.org/tip/c7993165ef0c1d636ca05f4787739f8414584e6d Author: Cyrill Gorcunov <gorcunov@openvz.org> AuthorDate: Sat, 8 May 2010 15:25:54 +0400 Committer: Ingo Molnar <mingo@elte.hu> CommitDate: Sat, 8 May 2010 14:17:53 +0200
x86, perf: P4 PMU -- check for proper event index in RAW events
RAW events are special and we should be ready for user passing in insane event index values.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Lin Ming <ming.m.lin@intel.com> LKML-Reference: <20100508112717.315897547@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> --- arch/x86/kernel/cpu/perf_event_p4.c | 11 ++++++++++- 1 files changed, 10 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c index b8c2d37..a603930 100644 --- a/arch/x86/kernel/cpu/perf_event_p4.c +++ b/arch/x86/kernel/cpu/perf_event_p4.c @@ -418,6 +418,7 @@ static int p4_hw_config(struct perf_event *event) { int cpu = get_cpu(); int rc = 0; + unsigned int evnt; u32 escr, cccr; /* @@ -436,6 +437,14 @@ static int p4_hw_config(struct perf_event *event) event->hw.config = p4_set_ht_bit(event->hw.config); if (event->attr.type == PERF_TYPE_RAW) { + + /* user data may have out-of-bound event index */ + evnt = p4_config_unpack_event(event->attr.config); + if (evnt >= ARRAY_SIZE(p4_event_bind_map)) { + rc = -EINVAL; + goto out; + } + /* * We don't control raw events so it's up to the caller * to pass sane values (and we don't count the thread number @@ -451,8 +460,8 @@ static int p4_hw_config(struct perf_event *event) } rc = x86_setup_perfctr(event); +out: put_cpu(); - return rc; }
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