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| author | Thomas Richter <tmricht@linux.ibm.com> | 2022-06-14 12:40:46 +0200 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-06-23 17:23:59 +0200 |
| commit | 541a496644512ebed429b33f19a3fadfb19c6ee7 (patch) | |
| tree | ccbb694af447eefee9542bb568b3ccb0e428e9e0 | |
| parent | be857b7f77d130dbbd47c91fc35198b040f35865 (diff) | |
| download | linux-541a496644512ebed429b33f19a3fadfb19c6ee7.tar.gz linux-541a496644512ebed429b33f19a3fadfb19c6ee7.tar.bz2 linux-541a496644512ebed429b33f19a3fadfb19c6ee7.zip | |
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 <tmricht@linux.ibm.com>
Suggested-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
| -rw-r--r-- | arch/s390/kernel/perf_pai_crypto.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c index 8c1545946d85..188c6cf09c7a 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) |