linux-kernel - [PATCH 0/2] tweak kmemleak report format

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Message-ID: <20231116224318.124209-1-jim.cromie@gmail.com>
Date:   Thu, 16 Nov 2023 15:43:16 -0700
From:   Jim Cromie <jim.cromie@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     catalin.marinas@....com, akpm@...ux-foundation.org,
        Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH 0/2] tweak kmemleak report format

These 2 patches make minor changes to the report:

1st strips "age <increasing>" from output.  This makes the output
idempotent; unchanging until a new leak is reported.

2nd adds the backtrace.checksum to the "backtrace:" line.  This lets a
user see repeats without actually reading the whole backtrace.  So now
the backtrace line looks like this:

  backtrace (ck 603070071):

I surveyed for un-wanted effects upon users:

Syzkaller parses kmemleak in executor/common_linux.h:
static void check_leaks(char** frames, int nframes)

It just counts occurrences of "unreferenced object", specifically it
does not look for "age", nor would it choke on "crc" being added.

github has 3 repos with "kmemleak" mentioned, all are moribund.
gitlab has 0 hits on "kmemleak".

Jim Cromie (2):
  kmemleak: drop (age <increasing>) from leak record
  kmemleak: add checksum to backtrace report

 mm/kmemleak.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

-- 
2.41.0