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Peter Zijlstra f2fa49f50b perf/x86: Fix possible Spectre-v1 indexing for x86_pmu::event_map() 
commit 46b1b577229a091b137831becaa0fae8690ee15a upstream.

> arch/x86/events/intel/cstate.c:307 cstate_pmu_event_init() warn: potential spectre issue 'pkg_msr' (local cap)
> arch/x86/events/intel/core.c:337 intel_pmu_event_map() warn: potential spectre issue 'intel_perfmon_event_map'
> arch/x86/events/intel/knc.c:122 knc_pmu_event_map() warn: potential spectre issue 'knc_perfmon_event_map'
> arch/x86/events/intel/p4.c:722 p4_pmu_event_map() warn: potential spectre issue 'p4_general_events'
> arch/x86/events/intel/p6.c:116 p6_pmu_event_map() warn: potential spectre issue 'p6_perfmon_event_map'
> arch/x86/events/amd/core.c:132 amd_pmu_event_map() warn: potential spectre issue 'amd_perfmon_event_map'

Userspace controls @attr, sanitize @attr->config before passing it on
to x86_pmu::event_map().

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-16 10:06:52 +02:00
..
alpha vgacon: Set VGA struct resource types 2018-03-24 10:58:48 +01:00
arc ARC: uaccess: dont use "l" gcc inline asm constraint modifier 2018-01-10 09:27:11 +01:00
arm ARM: dts: at91: sama5d4: fix pinctrl compatible string 2018-04-24 09:32:05 +02:00
arm64 arm64: futex: Fix undefined behaviour with FUTEX_OP_OPARG_SHIFT usage 2018-04-13 19:50:15 +02:00
avr32 avr32: off by one in at32_init_pio() 2016-10-07 15:23:45 +02:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:05:00 +01:00
c6x c6x/ptrace: Remove useless PTRACE_SETREGSET implementation 2017-03-31 09:49:53 +02:00
cris cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected 2017-01-12 11:22:48 +01:00
frv frv: declare jiffies to be located in the .data section 2018-04-08 11:51:57 +02:00
h8300 h8300/ptrace: Fix incorrect register transfer count 2017-03-31 09:49:53 +02:00
hexagon hexagon: fix strncpy_from_user() error return 2016-09-24 10:07:44 +02:00
ia64 ia64: fix module loading for gcc-5.4 2018-03-24 10:58:45 +01:00
m32r m32r: fix __get_user() 2016-09-24 10:07:43 +02:00
m68k m68k: Fix ndelay() macro 2016-12-15 08:49:23 -08:00
metag metag/uaccess: Check access_ok in strncpy_from_user 2017-05-25 14:30:16 +02:00
microblaze microblaze: fix copy_from_user() 2016-09-24 10:07:43 +02:00
mips MIPS: memset.S: Fix clobber of v1 in last_fixup 2018-04-24 09:32:10 +02:00
mn10300 mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy 2018-02-16 20:09:47 +01:00
nios2 nios2: reserve boot memory for device tree 2017-04-12 12:38:34 +02:00
openrisc signal/openrisc: Fix do_unaligned_access to send the proper signal 2018-02-16 20:09:46 +01:00
parisc parisc: Fix out of array access in match_pci_device() 2018-04-24 09:32:03 +02:00
powerpc powerpc/lib: Fix off-by-one in alternate feature patching 2018-04-24 09:32:11 +02:00
s390 KVM: s390: Enable all facility bits that are known good for passthrough 2018-05-16 10:06:46 +02:00
score score: fix copy_from_user() and friends 2016-09-24 10:07:44 +02:00
sh SolutionEngine771x: fix Ether platform data 2018-03-03 10:19:45 +01:00
sparc sparc64: ldc abort during vds iso boot 2018-04-13 19:50:20 +02:00
tile mm: larger stack guard gap, between vmas 2017-06-26 07:13:11 +02:00
um um: Use POSIX ucontext_t instead of struct ucontext 2018-04-24 09:32:08 +02:00
unicore32 pwm: Changes for v4.4-rc1 2015-11-11 09:16:10 -08:00
x86 perf/x86: Fix possible Spectre-v1 indexing for x86_pmu::event_map() 2018-05-16 10:06:52 +02:00
xtensa xtensa: fix futex_atomic_cmpxchg_inatomic 2018-02-16 20:09:47 +01:00
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