[PATCH v3 0/3] perf tools: Fix memory issues

[Michalis Niarchos via B4 Relay]

Running:
  $ perf kvm stat record -a sleep 10

gives this output:
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 1.361 MB perf.data.guest ]
  double free or corruption (!prev)

In the process of resolving this, I came across some memory leaks.

Signed-off-by: Michalis Niarchos <michael.niarchos@xxxxxxxxx>
---
Changes in v3:
- Moved dead code removal to the correct patch.
- Squashed double free patches, as both fix the same rec_argv
  double-free/leak pattern.
- Link to v2: https://patch.msgid.link/20260803-perf-kvm-fixes-v2-0-1b337189fffc@xxxxxxxxx

Changes in v2:
- Removed code block that was rendered dead by the
  get_filename_for_perf_kvm() change.
- Dropped invalid free() fix from kvm_events_report().
- Added double free fixes for: __cmd_record(), __cmd_report(),
  __cmd_buildid_list(), and __cmd_top(), which follow the same pattern
  as kvm_events_record().
- Link to v1: https://patch.msgid.link/20260803-perf-kvm-fixes-v1-0-a5db849ac973@xxxxxxxxx

To: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
To: Ingo Molnar <mingo@xxxxxxxxxx>
To: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
To: Namhyung Kim <namhyung@xxxxxxxxxx>
To: Mark Rutland <mark.rutland@xxxxxxx>
To: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
To: Jiri Olsa <jolsa@xxxxxxxxxx>
To: Ian Rogers <irogers@xxxxxxxxxx>
To: Adrian Hunter <adrian.hunter@xxxxxxxxx>
To: James Clark <james.clark@xxxxxxxxxx>
Cc: linux-perf-users@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

---
Michalis Niarchos (3):
      perf tools: Fix memory leak in cmd_kvm()
      perf tools: Fix double free and memory leak issues
      perf tools: Fix memory leak in cmd_kvm()

 tools/perf/builtin-kvm.c                         | 99 +++++++++++-------------
 tools/perf/util/kvm-stat-arch/kvm-stat-powerpc.c |  4 +-
 tools/perf/util/kvm-stat-arch/kvm-stat-x86.c     | 10 +--
 3 files changed, 50 insertions(+), 63 deletions(-)
---
base-commit: a1ed064cb4db70af8c4177b3805ca5b8b0be567e
change-id: 20260731-perf-kvm-fixes-a17f0aa048ad

Best regards,
--  
Michalis Niarchos <michael.niarchos@xxxxxxxxx>