linux-kernel - [PATCH 5.15 144/177] perf inject: Fix segfault due to close without open

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Message-Id: <20211220143044.929790600@linuxfoundation.org>
Date:   Mon, 20 Dec 2021 15:34:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Adrian Hunter <adrian.hunter@...el.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Riccardo Mancini <rickyman7@...il.com>
Subject: [PATCH 5.15 144/177] perf inject: Fix segfault due to close without open

From: Adrian Hunter <adrian.hunter@...el.com>

commit 0c8e32fe48f549eef27c8c6b0a63530f83c3a643 upstream.

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@...ry=0x7ffcdafa6578) at util/data.c:376
  #2  0x0000557fc7a6b807 in cmd_inject (argc=<optimized out>, argv=<optimized out>) at builtin-inject.c:1085
  #3  0x0000557fc7ac4783 in run_builtin (p=0x557fc8074878 <commands+600>, argc=4, argv=0x7ffcdafb6a60) at perf.c:313
  #4  0x0000557fc7a25d5c in handle_internal_command (argv=<optimized out>, argc=<optimized out>) at perf.c:365
  #5  run_argv (argcp=<optimized out>, argv=<optimized out>) 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 <adrian.hunter@...el.com>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Riccardo Mancini <rickyman7@...il.com>
Cc: stable@...r.kernel.org
Link: http://lore.kernel.org/lkml/20211213084829.114772-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 tools/perf/builtin-inject.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -1069,7 +1069,8 @@ out_delete:
 	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;
 }