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Andy Lutomirski 62f57041fb x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm

commit 5dc855d44c upstream.

If one thread mmaps a perf event while another thread in the same mm
is in some context where active_mm != mm (which can happen in the
scheduler, for example), refresh_pce() would write the wrong value
to CR4.PCE.  This broke some PAPI tests.

Reported-and-tested-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: H. Peter Anvin <hpa@zytor.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: stable@vger.kernel.org
Fixes: 7911d3f7af ("perf/x86: Only allow rdpmc if a perf_event is mapped")
Link: http://lkml.kernel.org/r/0c5b38a76ea50e405f9abe07a13dfaef87c173a1.1489694270.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-03-22 12:04:18 +01:00

..

alpha: fix copy_from_user()

2016-09-24 10:07:45 +02:00

ARC: [arcompact] brown paper bag bug in unaligned access delay slot fixup

2017-02-14 15:22:50 -08:00

arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2

2017-03-12 06:37:28 +01:00

arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2

2017-03-12 06:37:28 +01:00

avr32: off by one in at32_init_pio()

2016-10-07 15:23:45 +02:00

net: smc91x: fix SMC accesses

2016-09-30 10:18:37 +02:00

…

cris: Only build flash rescue image if CONFIG_ETRAX_AXISFLASHMAP is selected

2017-01-12 11:22:48 +01:00

frv: fix clear_user()

2016-09-24 10:07:44 +02:00

h8300: fix syscall restarting

2016-11-10 16:36:32 +01:00

hexagon: fix strncpy_from_user() error return

2016-09-24 10:07:44 +02:00

ia64: copy_from_user() should zero the destination on access_ok() failure

2016-09-24 10:07:46 +02:00

m32r: fix __get_user()

2016-09-24 10:07:43 +02:00

m68k: Fix ndelay() macro

2016-12-15 08:49:23 -08:00

metag: Only define atomic_dec_if_positive conditionally

2016-10-28 03:01:31 -04:00

microblaze: fix copy_from_user()

2016-09-24 10:07:43 +02:00

MIPS: Netlogic: Fix CP0_EBASE redefinition warnings

2017-03-18 19:09:57 +08:00

mn10300: copy_from_user() should zero on access_ok() failure...

2016-09-24 10:07:45 +02:00

nios2: copy_from_user() should zero the tail of destination

2016-09-24 10:07:45 +02:00

openrisc: fix the fix of copy_from_user()

2016-09-24 10:07:46 +02:00

parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header

2017-02-01 08:30:53 +01:00

powerpc: Emulation support for load/store instructions on LE

2017-03-18 19:09:57 +08:00

s390/kdump: Use "LINUX" ELF note name instead of "CORE"

2017-03-18 19:09:58 +08:00

score: fix copy_from_user() and friends

2016-09-24 10:07:44 +02:00

sh: fix copy_from_user()

2016-09-24 10:07:44 +02:00

sparc64: fix compile warning section mismatch in find_node()

2016-12-10 19:07:25 +01:00

tile/ptrace: Preserve previous registers for short regset write

2017-02-01 08:30:52 +01:00

um: Don't discard .text.exit section

2016-09-07 08:32:38 +02:00

…

x86/perf: Fix CR4.PCE propagation to use active_mm instead of mm

2017-03-22 12:04:18 +01:00

xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRD

2017-03-15 09:57:14 +08:00

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