From 0c8e32fe48f549eef27c8c6b0a63530f83c3a643 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Mon, 13 Dec 2021 10:48:28 +0200 Subject: [PATCH] perf inject: Fix segfault due to close without open The fixed commit attempts to close inject.output even if it was never opened e.g. $ perf record uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.002 MB perf.data (7 samples) ] $ perf inject -i perf.data --vm-time-correlation=dry-run Segmentation fault (core dumped) $ gdb --quiet perf Reading symbols from perf... (gdb) r inject -i perf.data --vm-time-correlation=dry-run Starting program: /home/ahunter/bin/perf inject -i perf.data --vm-time-correlation=dry-run [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0x00007eff8afeef5b in _IO_new_fclose (fp=0x0) at iofclose.c:48 48 iofclose.c: No such file or directory. (gdb) bt #0 0x00007eff8afeef5b in _IO_new_fclose (fp=0x0) at iofclose.c:48 #1 0x0000557fc7b74f92 in perf_data__close (data=data@entry=0x7ffcdafa6578) at util/data.c:376 #2 0x0000557fc7a6b807 in cmd_inject (argc=, argv=) at builtin-inject.c:1085 #3 0x0000557fc7ac4783 in run_builtin (p=0x557fc8074878 , argc=4, argv=0x7ffcdafb6a60) at perf.c:313 #4 0x0000557fc7a25d5c in handle_internal_command (argv=, argc=) at perf.c:365 #5 run_argv (argcp=, argv=) at perf.c:409 #6 main (argc=4, argv=0x7ffcdafb6a60) at perf.c:539 (gdb) Fixes: 02e6246f5364d526 ("perf inject: Close inject.output on exit") Signed-off-by: Adrian Hunter Tested-by: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Namhyung Kim Cc: Riccardo Mancini Cc: stable@vger.kernel.org Link: http://lore.kernel.org/lkml/20211213084829.114772-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-inject.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c index b9d6306cc14e..af70f1c72052 100644 --- a/tools/perf/builtin-inject.c +++ b/tools/perf/builtin-inject.c @@ -1078,7 +1078,8 @@ int cmd_inject(int argc, const char **argv) zstd_fini(&(inject.session->zstd_data)); perf_session__delete(inject.session); out_close_output: - perf_data__close(&inject.output); + if (!inject.in_place_update) + perf_data__close(&inject.output); free(inject.itrace_synth_opts.vm_tm_corr_args); return ret; }