Krister Johansen 11a4d644d6 perf callchain: Reference count maps ...

commit aa33b9b9a2 upstream.

If dso__load_kcore frees all of the existing maps, but one has already
been attached to a callchain cursor node, then we can get a SIGSEGV in
any function that happens to try to use this invalid cursor.  Use the
existing map refcount mechanism to forestall cleanup of a map until the
cursor iterates past the node.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Fixes: 84c2cafa28 ("perf tools: Reference count struct map")
Link: http://lkml.kernel.org/r/20170106062331.GB2707@templeofstupid.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-03-12 06:41:47 +01:00

..

arch

perf uretprobe ppc64le: Fix probe location

2016-10-05 08:14:22 -03:00

bench

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Documentation

perf top/report: Add tips about a list option

2016-10-05 19:51:53 -03:00

jvmti

perf jit: Fix build issue on Ubuntu

2016-10-17 11:25:34 -03:00

pmu-events

perf jevents: Fix Intel JSON fixed counter conversions

2016-10-05 18:41:06 -03:00

python

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scripts

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tests

perf tests: Add dwarf unwind test for powerpc

2016-09-29 11:18:21 -03:00

trace

perf trace: Check if MAP_32BIT is defined (again)

2017-01-26 08:24:36 +01:00

ui

perf diff: Fix segfault on 'perf diff -o N' option

2017-02-14 15:25:42 -08:00

util

perf callchain: Reference count maps

2017-03-12 06:41:47 +01:00

.gitignore

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Build

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builtin-annotate.c

perf annotate: Add branch stack / basic block

2016-09-08 13:44:03 -03:00

builtin-bench.c

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builtin-buildid-cache.c

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builtin-buildid-list.c

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builtin-config.c

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builtin-data.c

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builtin-diff.c

perf diff: Fix -o/--order option behavior (again)

2017-02-14 15:25:42 -08:00

builtin-evlist.c

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builtin-help.c

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builtin-inject.c

perf symbols: Remove symbol_filter_t machinery

2016-09-05 11:14:50 -03:00

builtin-kmem.c

perf symbols: Remove symbol_filter_t machinery

2016-09-05 11:14:50 -03:00

builtin-kvm.c

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builtin-list.c

perf list: Support long jevents descriptions

2016-10-03 21:35:47 -03:00

builtin-lock.c

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builtin-mem.c

perf mem: Fix --all-user/--all-kernel options

2017-01-26 08:24:35 +01:00

builtin-probe.c

perf probe: Ignore vmlinux Build-id when offline vmlinux given

2016-09-01 12:42:22 -03:00

builtin-record.c

perf record: Add support for using symbols in address filters

2016-09-29 11:17:02 -03:00

builtin-report.c

perf report: Enable group view with hierarchy

2016-09-13 16:43:41 -03:00

builtin-sched.c

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builtin-script.c

perf symbols: Remove symbol_filter_t machinery

2016-09-05 11:14:50 -03:00

builtin-stat.c

perf tools: Add PMU configuration to tools

2016-09-22 13:07:36 -03:00

builtin-timechart.c

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builtin-top.c

perf tools: Add PMU configuration to tools

2016-09-22 13:07:36 -03:00

builtin-trace.c

perf trace: Use the syscall raw_syscalls:sys_enter timestamp

2017-01-26 08:24:35 +01:00

builtin-version.c

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builtin.h

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command-list.txt

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CREDITS

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design.txt

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Makefile

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Makefile.config

perf jit: Enable jitdump support without dwarf

2017-01-26 08:24:36 +01:00

Makefile.perf

perf jevents: Program to convert JSON file

2016-10-03 19:55:55 -03:00

MANIFEST

tools include: Add uapi mman.h for each architecture

2016-09-13 15:26:08 -03:00

perf-archive.sh

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perf-completion.sh

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perf-read-vdso.c

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perf-sys.h

perf powerpc: Fix build-test failure

2016-09-08 13:44:07 -03:00

perf-with-kcore.sh

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perf.c

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perf.h

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