https://github.com/torvalds/linux
Revision 451d24d1e5f40bad000fa9abe36ddb16fc9928cb authored by Peter Zijlstra on 31 January 2017, 10:27:10 UTC, committed by Ingo Molnar on 10 February 2017, 08:04:50 UTC
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 <alexei.starovoitov@gmail.com>
Tested-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: David Carrillo-Cisneros <davidcc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: eranian@google.com
Fixes: d6a2f9035bfc ("perf/core: Introduce PMU_EV_CAP_READ_ACTIVE_PKG")
Link: http://lkml.kernel.org/r/20170131102710.GL6515@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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History 
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Tip revision: 451d24d1e5f40bad000fa9abe36ddb16fc9928cb authored by Peter Zijlstra on 31 January 2017, 10:27:10 UTC
perf/core: Fix crash in perf_event_read()
perf/core: Fix crash in perf_event_read()
Tip revision: 451d24d
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| init | ||
| ipc | ||
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| .cocciconfig | -rw-r--r-- | 59 bytes |
| .get_maintainer.ignore | -rw-r--r-- | 31 bytes |
| .gitattributes | -rw-r--r-- | 30 bytes |
| .gitignore | -rw-r--r-- | 1.3 KB |
| .mailmap | -rw-r--r-- | 7.7 KB |
| COPYING | -rw-r--r-- | 18.3 KB |
| CREDITS | -rw-r--r-- | 96.0 KB |
| Kbuild | -rw-r--r-- | 2.8 KB |
| Kconfig | -rw-r--r-- | 252 bytes |
| MAINTAINERS | -rw-r--r-- | 383.0 KB |
| Makefile | -rw-r--r-- | 57.6 KB |
| README | -rw-r--r-- | 722 bytes |
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