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From: Muchun Song <muchun.song@linux.dev>
To: Hongfu Li <lihongfu@kylinos.cn>
Cc: hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev,
	shakeel.butt@linux.dev, tj@kernel.org, mkoutny@suse.com,
	shuah@kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] selftests/cgroup: check malloc return value in alloc_anon functions
Date: Mon, 11 May 2026 10:46:41 +0800	[thread overview]
Message-ID: <EA4FB6D8-52F0-4135-8EBE-0B26BBA9D303@linux.dev> (raw)
In-Reply-To: <20260511021615.1768623-1-lihongfu@kylinos.cn>



> On May 11, 2026, at 10:16, Hongfu Li <lihongfu@kylinos.cn> wrote:
> 
> The alloc_anon() function calls malloc() without checking for a NULL
> return. If memory allocation fails, a NULL pointer dereference will
> occur when accessing the buffer.
> 
> Add proper error handling to return -1 when malloc() fails in all
> four alloc_anon variants:
> - alloc_anon()
> - alloc_anon_50M_check()
> - alloc_anon_noexit()
> - alloc_anon_50M_check_swap()
> 
> Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>

Reviewed-by: Muchun Song <muchun.song@linux.dev>

Thanks.



      reply	other threads:[~2026-05-11  2:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-11  2:16 [PATCH] selftests/cgroup: check malloc return value in alloc_anon functions Hongfu Li
2026-05-11  2:46 ` Muchun Song [this message]

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