From: Kees Cook <kees@kernel.org>
To: Julia Lawall <Julia.Lawall@inria.fr>
Cc: cocci@inria.fr
Subject: Re: [cocci] __free() attribute inhibits matching?
Date: Tue, 18 Mar 2025 20:31:27 -0700 [thread overview]
Message-ID: <202503182023.D7C4D91@keescook> (raw)
In-Reply-To: <F7BB5789-F9F2-4D17-986A-AD7BC976F18B@inria.fr>
On Tue, Mar 18, 2025 at 06:56:40PM +0100, Julia Lawall wrote:
> I think you want
>
> Expression *m;
>
> A->@m b
>
> B would be an identifier
But how does "B" get correctly type restricted? (Or in my example,
"NAME"?)
I tried:
@direct depends on !(file in "tools") && !(file in "samples")@
type TYPE;
TYPE *P;
TYPE *MEMBER;
TYPE INST;
identifier NAME;
expression COMP;
identifier ALLOC =~ "^kv?[mz]alloc";
fresh identifier ALLOC_OBJ = ALLOC ## "_obj";
@@
\(\(P\|COMP.@MEMBER NAME\|COMP->@MEMBER NAME\) \& VAR\)
- = ALLOC((\(sizeof(*VAR)\|sizeof(TYPE)\|sizeof(INST)\)), GFP);
+ = ALLOC_OBJ(*VAR, GFP);
This parses, but don't match (from crypto/asymmetric_keys/x509_cert_parser.c):
cert->pub = kzalloc(sizeof(struct public_key), GFP_KERNEL);
But does match (via "P"):
cert = kzalloc(sizeof(struct x509_certificate), GFP_KERNEL);
/me continues to scratch head
--
Kees Cook
next prev parent reply other threads:[~2025-03-19 9:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-17 18:44 [cocci] __free() attribute inhibits matching? Kees Cook
2025-03-17 20:59 ` Julia Lawall
2025-03-17 23:02 ` Kees Cook
2025-03-17 23:13 ` Julia Lawall
2025-03-18 15:39 ` Kees Cook
2025-03-18 15:43 ` Julia Lawall
2025-03-18 16:30 ` Kees Cook
2025-03-18 17:56 ` Julia Lawall
2025-03-19 3:31 ` Kees Cook [this message]
2025-03-19 5:55 ` Julia Lawall
2025-03-19 7:20 ` [cocci] Checking the determination of type information? Markus Elfring
2025-03-19 7:44 ` [cocci] __free() attribute inhibits matching? Julia Lawall
2025-03-19 20:06 ` Kees Cook
2025-03-19 21:30 ` Kees Cook
2025-03-19 23:25 ` Julia Lawall
2025-03-21 13:52 ` Markus Elfring
2025-03-19 10:24 ` Markus Elfring
2025-03-19 10:57 ` Markus Elfring
2025-03-18 17:43 ` Markus Elfring
2025-03-18 18:02 ` Kees Cook
2025-03-18 19:18 ` Markus Elfring
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