Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Ingo Molnar:
"A fix for a misplaced permission check that can leave perf PT or LBR
disabled (on Intel CPUs) permanently until the next reboot"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel/bts: Fix exclusive event reference leak
+3
-3
+3
-3
arch/x86/events/intel/bts.c
+3
-3
arch/x86/events/intel/bts.c
···
546
546
if (event->attr.type != bts_pmu.type)
547
547
return -ENOENT;
548
548
549
-
if (x86_add_exclusive(x86_lbr_exclusive_bts))
550
-
return -EBUSY;
551
-
552
549
/*
553
550
* BTS leaks kernel addresses even when CPL0 tracing is
554
551
* disabled, so disallow intel_bts driver for unprivileged
···
558
561
if (event->attr.exclude_kernel && perf_paranoid_kernel() &&
559
562
!capable(CAP_SYS_ADMIN))
560
563
return -EACCES;
564
+
565
+
if (x86_add_exclusive(x86_lbr_exclusive_bts))
566
+
return -EBUSY;
561
567
562
568
ret = x86_reserve_hardware();
563
569
if (ret) {