Re: [PATCH v3 33/35] codetag: debug: mark codetags for reserved pages as empty

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To: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Subject: Re: [PATCH v3 33/35] codetag: debug: mark codetags for reserved pages as empty
From: Kees Cook <keescook@xxxxxxxxxxxx>
Date: Mon, 12 Feb 2024 14:45:40 -0800
Cc: akpm@xxxxxxxxxxxxxxxxxxxx, kent.overstreet@xxxxxxxxx, mhocko@xxxxxxxx, vbabka@xxxxxxx, hannes@xxxxxxxxxxx, roman.gushchin@xxxxxxxxx, mgorman@xxxxxxx, dave@xxxxxxxxxxxx, willy@xxxxxxxxxxxxx, liam.howlett@xxxxxxxxxx, corbet@xxxxxxx, void@xxxxxxxxxxxxx, peterz@xxxxxxxxxxxxx, juri.lelli@xxxxxxxxxx, catalin.marinas@xxxxxxx, will@xxxxxxxxxx, arnd@xxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, x86@xxxxxxxxxx, peterx@xxxxxxxxxx, david@xxxxxxxxxx, axboe@xxxxxxxxx, mcgrof@xxxxxxxxxx, masahiroy@xxxxxxxxxx, nathan@xxxxxxxxxx, dennis@xxxxxxxxxx, tj@xxxxxxxxxx, muchun.song@xxxxxxxxx, rppt@xxxxxxxxxx, paulmck@xxxxxxxxxx, pasha.tatashin@xxxxxxxxxx, yosryahmed@xxxxxxxxxx, yuzhao@xxxxxxxxxx, dhowells@xxxxxxxxxx, hughd@xxxxxxxxxx, andreyknvl@xxxxxxxxx, ndesaulniers@xxxxxxxxxx, vvvvvv@xxxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx, ebiggers@xxxxxxxxxx, ytcoode@xxxxxxxxx, vincent.guittot@xxxxxxxxxx, dietmar.eggemann@xxxxxxx, rostedt@xxxxxxxxxxx, bsegall@xxxxxxxxxx, bristot@xxxxxxxxxx, vschneid@xxxxxxxxxx, cl@xxxxxxxxx, penberg@xxxxxxxxxx, iamjoonsoo.kim@xxxxxxx, 42.hyeyoo@xxxxxxxxx, glider@xxxxxxxxxx, elver@xxxxxxxxxx, dvyukov@xxxxxxxxxx, shakeelb@xxxxxxxxxx, songmuchun@xxxxxxxxxxxxx, jbaron@xxxxxxxxxx, rientjes@xxxxxxxxxx, minchan@xxxxxxxxxx, kaleshsingh@xxxxxxxxxx, kernel-team@xxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-modules@xxxxxxxxxxxxxxx, kasan-dev@xxxxxxxxxxxxxxxx, cgroups@xxxxxxxxxxxxxxx
In-reply-to: <20240212213922.783301-34-surenb@google.com>
References: <20240212213922.783301-1-surenb@google.com> <20240212213922.783301-34-surenb@google.com>

On Mon, Feb 12, 2024 at 01:39:19PM -0800, Suren Baghdasaryan wrote:
> To avoid debug warnings while freeing reserved pages which were not
> allocated with usual allocators, mark their codetags as empty before
> freeing.

How do these get their codetags to begin with? Regardless:

Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>

-- 
Kees Cook

Follow-Ups:
- Re: [PATCH v3 33/35] codetag: debug: mark codetags for reserved pages as empty
  - From: Suren Baghdasaryan

References:
- [PATCH v3 00/35] Memory allocation profiling
  - From: Suren Baghdasaryan
- [PATCH v3 33/35] codetag: debug: mark codetags for reserved pages as empty
  - From: Suren Baghdasaryan

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