Peter Zijlstra 451d24d1e5 perf/core: Fix crash in perf_event_read() ...

Alexei had his box explode because doing read() on a package
(rapl/uncore) event that isn't currently scheduled in ends up doing an
out-of-bounds load.

Rework the code to more explicitly deal with event->oncpu being -1.

Reported-by: Alexei Starovoitov <[email protected]>
Tested-by: Alexei Starovoitov <[email protected]>
Tested-by: David Carrillo-Cisneros <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Fixes: d6a2f9035b ("perf/core: Introduce PMU_EV_CAP_READ_ACTIVE_PKG")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

2017-02-10 09:04:50 +01:00

..

callchain.c

perf core: Per event callchain limit

2016-05-30 12:41:44 -03:00

core.c

perf/core: Fix crash in perf_event_read()

2017-02-10 09:04:50 +01:00

hw_breakpoint.c

perf: Collapse and fix event_function_call() users

2016-01-21 18:54:24 +01:00

internal.h

bpf, events: fix offset in skb copy handler

2016-07-25 10:34:11 -07:00

Makefile

…

ring_buffer.c

perf/core: Fix aux_mmap_count vs aux_refcount order

2016-09-10 11:15:36 +02:00

uprobes.c

Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-12-23 16:49:12 -08:00