diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-03-21 11:26:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-03-21 11:26:21 -0700 |
| commit | 1c74516c2da40ead2c22c4ac07c117c20f9c31ec (patch) | |
| tree | bb5ae2c31540088f66fd1be64b864a38d8ae8faf | |
| parent | 5ba33b488a04a13268131b0b4748a7c6f3598693 (diff) | |
| parent | 2dc0572f2cef87425147658698dce2600b799bd3 (diff) | |
Merge tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Boundary condition fixes for bugs unearthed by the perf fuzzer"
* tag 'perf-urgent-2021-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Fix unchecked MSR access error caused by VLBR_EVENT
perf/x86/intel: Fix a crash caused by zero PEBS status
| -rw-r--r-- | arch/x86/events/intel/core.c | 3 | ||||
| -rw-r--r-- | arch/x86/events/intel/ds.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 7bbb5bb98d8c..37ce38403cb8 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3659,6 +3659,9 @@ static int intel_pmu_hw_config(struct perf_event *event) return ret; if (event->attr.precise_ip) { + if ((event->attr.config & INTEL_ARCH_EVENT_MASK) == INTEL_FIXED_VLBR_EVENT) + return -EINVAL; + if (!(event->attr.freq || (event->attr.wakeup_events && !event->attr.watermark))) { event->hw.flags |= PERF_X86_EVENT_AUTO_RELOAD; if (!(event->attr.sample_type & diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c index 7ebae1826403..d32b302719fe 100644 --- a/arch/x86/events/intel/ds.c +++ b/arch/x86/events/intel/ds.c @@ -2010,7 +2010,7 @@ static void intel_pmu_drain_pebs_nhm(struct pt_regs *iregs, struct perf_sample_d */ if (!pebs_status && cpuc->pebs_enabled && !(cpuc->pebs_enabled & (cpuc->pebs_enabled-1))) - pebs_status = cpuc->pebs_enabled; + pebs_status = p->status = cpuc->pebs_enabled; bit = find_first_bit((unsigned long *)&pebs_status, x86_pmu.max_pebs_events); |