From: Eric Biggers <ebiggers@kernel.org>
To: Jarkko Sakkinen <jarkko@kernel.org>
Cc: David Howells <dhowells@redhat.com>,
keyrings@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Paulo Alcantara <pc@manguebit.org>,
Namjae Jeon <linkinjeon@kernel.org>,
Ronnie Sahlberg <ronniesahlberg@gmail.com>,
Shyam Prasad N <sprasad@microsoft.com>,
Tom Talpey <tom@talpey.com>, Bharath SM <bharathsm@microsoft.com>,
Paul Moore <paul@paul-moore.com>,
James Morris <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
"open list:COMMON INTERNET FILE SYSTEM CLIENT (CIFS and SMB3)"
<linux-cifs@vger.kernel.org>,
"moderated list:COMMON INTERNET FILE SYSTEM CLIENT (CIFS and
SMB3)" <samba-technical@lists.samba.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:SECURITY SUBSYSTEM"
<linux-security-module@vger.kernel.org>
Subject: Re: [RFC PATCH 1/6] keys: prevent quota overflow and widen quotalen and datalen to 32 bits
Date: Fri, 16 Oct 2026 22:28:44 -0700 [thread overview]
Message-ID: <20261017052844.GC29318@sol> (raw)
In-Reply-To: <20261016215326.4110064-2-jarkko@kernel.org>
On Sat, Oct 17, 2026 at 12:52:59AM +0300, Jarkko Sakkinen wrote:
> @@ -245,6 +245,10 @@ struct key *key_alloc(struct key_type *type, const char *desc,
> }
>
> desclen = strlen(desc);
> + if (desclen >= INT_MAX || type->def_datalen > INT_MAX - desclen - 1) {
> + key = ERR_PTR(-EINVAL);
> + goto error;
> + }
> quotalen = desclen + 1 + type->def_datalen;
This should be tightened further to 'desclen > U16_MAX', since desclen
is assigned to a u16 later in the function.
- Eric
next prev parent reply other threads:[~2026-10-17 5:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-16 21:52 [RFC PATCH 0/6] KEYS: From assoc_array to rhashtable migration Jarkko Sakkinen
2026-10-16 21:52 ` [RFC PATCH 1/6] keys: prevent quota overflow and widen quotalen and datalen to 32 bits Jarkko Sakkinen
2026-10-17 5:28 ` Eric Biggers [this message]
2026-10-16 21:53 ` [RFC PATCH 2/6] keys: reclaim link quota during keyring garbage collection Jarkko Sakkinen
2026-10-17 5:42 ` Eric Biggers
2026-10-16 21:53 ` [RFC PATCH 3/6] keys: verify key identity on unlink and move Jarkko Sakkinen
2026-10-16 21:53 ` [RFC PATCH 4/6] keys: Add keyring_is_empty() for {fs,dm}-verity Jarkko Sakkinen
2026-10-16 21:53 ` [RFC PATCH 5/6] KEYS: Replace assoc_array with struct keyring_index Jarkko Sakkinen
2026-10-16 22:27 ` Jarkko Sakkinen
2026-10-16 21:53 ` [RFC PATCH 6/6] lib: Remove unused assoc_array Jarkko Sakkinen
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