From: Kees Cook <kees@kernel.org>
To: Julia Lawall <julia.lawall@inria.fr>
Cc: "cocci@inria.fr" <cocci@inria.fr>
Subject: [cocci] __free() attribute inhibits matching?
Date: Mon, 17 Mar 2025 11:44:42 -0700 [thread overview]
Message-ID: <202503171135.B1CCC51FA@keescook> (raw)
Hi!
It seems that the mere presence of the "__free" attribute breaks
matching:
$ cat test.c
static void why(void)
{
u64 *rates_64 __free(kfree) = NULL;
rates_64 = kcalloc(count, sizeof(*rates_64), GFP_KERNEL);
}
$ cat match.cocci
@replace@
expression THING, COUNT;
expression GFP;
@@
- kcalloc(COUNT, sizeof(*THING), GFP)
+ kzalloc_objs(*THING, COUNT, GFP)
$ spatch --very-quiet --cocci-file match.cocci test.c
Which doesn't match. If I comment out the "__free()" it works:
$ cat test.c
static void why(void)
{
u64 *rates_64 /*__free(kfree)*/ = NULL;
rates_64 = kcalloc(count, sizeof(*rates_64), GFP_KERNEL);
}
$ spatch --very-quiet --cocci-file match.cocci test.c
--- test.c
+++ cocci-output-1466652-b8a5c5-test.c
@@ -1,5 +1,5 @@
static void why(void)
{
u64 *rates_64 /*__free(kfree)*/ = NULL;
- rates_64 = kcalloc(count, sizeof(*rates_64), GFP_KERNEL);
+ rates_64 = kzalloc_objs(*rates_64, count, GFP_KERNEL);
}
I have tried adding "attribute name __free;" to the rule (which didn't
seem sane, but also didn't work). I have tried adding this line to my
standard.h:
#define __free(x) MACROANNOTATION
but that didn't work either.
What is going wrong here?
Thanks!
-Kees
--
Kees Cook
next reply other threads:[~2025-03-18 9:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-17 18:44 Kees Cook [this message]
2025-03-17 20:59 ` [cocci] __free() attribute inhibits matching? 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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202503171135.B1CCC51FA@keescook \
--to=kees@kernel.org \
--cc=cocci@inria.fr \
--cc=julia.lawall@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).