From: Thomas Richter Date: Tue, 14 Jun 2022 10:40:46 +0000 (+0200) Subject: s390/pai: Prevent invalid event number for pai_crypto PMU X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=541a496644512ebed429b33f19a3fadfb19c6ee7;p=linux.git s390/pai: Prevent invalid event number for pai_crypto PMU The pai_crypto PMU has to check the event number. It has to be in the supported range. This is not the case, the lower limit is not checked. Fix this and obey the lower limit. Fixes: 39d62336f5c1 ("s390/pai: add support for cryptography counters") Signed-off-by: Thomas Richter Suggested-by: Sumanth Korikkar Reviewed-by: Sumanth Korikkar Signed-off-by: Alexander Gordeev --- diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c index 8c1545946d85e..188c6cf09c7a2 100644 --- a/arch/s390/kernel/perf_pai_crypto.c +++ b/arch/s390/kernel/perf_pai_crypto.c @@ -193,8 +193,9 @@ static int paicrypt_event_init(struct perf_event *event) /* PAI crypto PMU registered as PERF_TYPE_RAW, check event type */ if (a->type != PERF_TYPE_RAW && event->pmu->type != a->type) return -ENOENT; - /* PAI crypto event must be valid */ - if (a->config > PAI_CRYPTO_BASE + paicrypt_cnt) + /* PAI crypto event must be in valid range */ + if (a->config < PAI_CRYPTO_BASE || + a->config > PAI_CRYPTO_BASE + paicrypt_cnt) return -EINVAL; /* Allow only CPU wide operation, no process context for now. */ if (event->hw.target || event->cpu == -1)