• Arnaldo Carvalho de Melo's avatar
    perf evsel: Free evsel->counts in perf_evsel__exit() · cf050670
    Arnaldo Carvalho de Melo authored
    [ Upstream commit 42dfa451 ]
    
    Using gcc's ASan, Changbin reports:
    
      =================================================================
      ==7494==ERROR: LeakSanitizer: detected memory leaks
    
      Direct leak of 48 byte(s) in 1 object(s) allocated from:
          #0 0x7f0333a89138 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xee138)
          #1 0x5625e5330a5e in zalloc util/util.h:23
          #2 0x5625e5330a9b in perf_counts__new util/counts.c:10
          #3 0x5625e5330ca0 in perf_evsel__alloc_counts util/counts.c:47
          #4 0x5625e520d8e5 in __perf_evsel__read_on_cpu util/evsel.c:1505
          #5 0x5625e517a985 in perf_evsel__read_on_cpu /home/work/linux/tools/perf/util/evsel.h:347
          #6 0x5625e517ad1a in test__openat_syscall_event tests/openat-syscall.c:47
          #7 0x5625e51528e6 in run_test tests/builtin-test.c:358
          #8 0x5625e5152baf in test_and_print tests/builtin-test.c:388
          #9 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
          #10 0x5625e515572f in cmd_test tests/builtin-test.c:722
          #11 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
          #12 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
          #13 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
          #14 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
          #15 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    
      Indirect leak of 72 byte(s) in 1 object(s) allocated from:
          #0 0x7f0333a89138 in calloc (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xee138)
          #1 0x5625e532560d in zalloc util/util.h:23
          #2 0x5625e532566b in xyarray__new util/xyarray.c:10
          #3 0x5625e5330aba in perf_counts__new util/counts.c:15
          #4 0x5625e5330ca0 in perf_evsel__alloc_counts util/counts.c:47
          #5 0x5625e520d8e5 in __perf_evsel__read_on_cpu util/evsel.c:1505
          #6 0x5625e517a985 in perf_evsel__read_on_cpu /home/work/linux/tools/perf/util/evsel.h:347
          #7 0x5625e517ad1a in test__openat_syscall_event tests/openat-syscall.c:47
          #8 0x5625e51528e6 in run_test tests/builtin-test.c:358
          #9 0x5625e5152baf in test_and_print tests/builtin-test.c:388
          #10 0x5625e51543fe in __cmd_test tests/builtin-test.c:583
          #11 0x5625e515572f in cmd_test tests/builtin-test.c:722
          #12 0x5625e51c3fb8 in run_builtin /home/changbin/work/linux/tools/perf/perf.c:302
          #13 0x5625e51c44f7 in handle_internal_command /home/changbin/work/linux/tools/perf/perf.c:354
          #14 0x5625e51c48fb in run_argv /home/changbin/work/linux/tools/perf/perf.c:398
          #15 0x5625e51c5069 in main /home/changbin/work/linux/tools/perf/perf.c:520
          #16 0x7f033214d09a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2409a)
    
    His patch took care of evsel->prev_raw_counts, but the above backtraces
    are about evsel->counts, so fix that instead.
    Reported-by: default avatarChangbin Du <changbin.du@gmail.com>
    Cc: Alexei Starovoitov <ast@kernel.org>
    Cc: Daniel Borkmann <daniel@iogearbox.net>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
    Link: https://lkml.kernel.org/n/tip-hd1x13g59f0nuhe4anxhsmfp@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
    cf050670
evsel.c 71.9 KB