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| author | Krister Johansen | 2017-01-06 07:23:31 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2017-02-02 15:39:09 +0100 |
| commit | aa33b9b9a2ebb00d33c83a5312d4fbf2d5aeba36 (patch) | |
| tree | bb0805b62c31bfee44ae018eac68214c0e40d1e1 /scripts/extract_xc3028.pl | |
| parent | perf diff: Fix -o/--order option behavior (again) (diff) | |
| download | kernel-qcow2-linux-aa33b9b9a2ebb00d33c83a5312d4fbf2d5aeba36.tar.gz kernel-qcow2-linux-aa33b9b9a2ebb00d33c83a5312d4fbf2d5aeba36.tar.xz kernel-qcow2-linux-aa33b9b9a2ebb00d33c83a5312d4fbf2d5aeba36.zip | |
perf callchain: Reference count maps
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>
Cc: stable@kernel.org
Fixes: 84c2cafa2889 ("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>
Diffstat (limited to 'scripts/extract_xc3028.pl')
0 files changed, 0 insertions, 0 deletions