4.9-stable review patch. If anyone has any objections, please let me know.
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From: Namhyung Kim namhyung@kernel.org
[ Upstream commit 1d6b3c9ba756a5134fd7ad1959acac776d17404b ]
Currently perf decompresses kernel modules when loading the symbol table but it missed to do it when reading raw data.
Signed-off-by: Namhyung Kim namhyung@kernel.org Acked-by: Jiri Olsa jolsa@kernel.org Cc: Adrian Hunter adrian.hunter@intel.com Cc: David Ahern dsahern@gmail.com Cc: Peter Zijlstra a.p.zijlstra@chello.nl Cc: Wang Nan wangnan0@huawei.com Cc: kernel-team@lge.com Link: http://lkml.kernel.org/r/20170608073109.30699-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/perf/util/dso.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
--- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -366,7 +366,23 @@ static int __open_dso(struct dso *dso, s if (!is_regular_file(name)) return -EINVAL;
+ if (dso__needs_decompress(dso)) { + char newpath[KMOD_DECOMP_LEN]; + size_t len = sizeof(newpath); + + if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { + free(name); + return -dso->load_errno; + } + + strcpy(name, newpath); + } + fd = do_open(name); + + if (dso__needs_decompress(dso)) + unlink(name); + free(name); return fd; }