From: Herbert Xu <herbert@gondor.apana.org.au>
To: Weiming Shi <bestswngs@gmail.com>
Cc: David Howells <dhowells@redhat.com>,
Lukas Wunner <lukas@wunner.de>, Ignat Korchagin <ignat@linux.win>,
"David S . Miller" <davem@davemloft.net>,
Vivek Goyal <vgoyal@redhat.com>, Kees Cook <kees@kernel.org>,
keyrings@vger.kernel.org, linux-crypto@vger.kernel.org,
Xiang Mei <xmei5@asu.edu>, Jarkko Sakkinen <jarkko@kernel.org>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Mimi Zohar <zohar@linux.ibm.com>
Subject: Re: [PATCH] crypto: fix OOB read in pefile_digest_pe_contents
Date: Tue, 5 May 2026 13:46:43 +0800 [thread overview]
Message-ID: <afmEQ5ove_8fqEhH@gondor.apana.org.au> (raw)
In-Reply-To: <20260430173632.277436-3-bestswngs@gmail.com>
>
> diff --git a/crypto/asymmetric_keys/verify_pefile.c b/crypto/asymmetric_keys/verify_pefile.c
> index 1f3b227ba7f2..cec99db14129 100644
> --- a/crypto/asymmetric_keys/verify_pefile.c
> +++ b/crypto/asymmetric_keys/verify_pefile.c
> @@ -305,6 +305,8 @@ static int pefile_digest_pe_contents(const void *pebuf, unsigned int pelen,
>
> if (pelen > hashed_bytes) {
> tmp = hashed_bytes + ctx->certs_size;
> + if (tmp <= hashed_bytes || pelen < tmp)
> + return -ELIBBAD;
I know nothing about this but why should pelen == tmp fail?
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
next prev parent reply other threads:[~2026-05-05 5:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 17:36 [PATCH] crypto: fix OOB read in pefile_digest_pe_contents Weiming Shi
2026-05-05 5:46 ` Herbert Xu [this message]
2026-05-05 7:12 ` Weiming Shi
2026-05-05 8:23 ` Herbert Xu
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