From: Julia Lawall <Julia.Lawall@lip6.fr>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: kernel-janitors@vger.kernel.org,
Gilles Muller <Gilles.Muller@lip6.fr>,
Nicolas Palix <nicolas.palix@imag.fr>,
Michal Marek <michal.lkml@markovi.net>,
cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org
Subject: [PATCH] coccinelle: reduce false positives
Date: Thu, 1 Feb 2018 10:48:52 +0100 [thread overview]
Message-ID: <1517478532-5444-1-git-send-email-Julia.Lawall@lip6.fr> (raw)
Some files use both a non-devm allocation and a devm_allocation. Don't
complain about a free when the same function contains a non-devm
allocation.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
---
scripts/coccinelle/free/devm_free.cocci | 55 +++++++++++++++++++++++++++++++-
1 file changed, 54 insertions(+), 1 deletion(-)
diff --git a/scripts/coccinelle/free/devm_free.cocci b/scripts/coccinelle/free/devm_free.cocci
index c990d2c..b2a2cf8b 100644
--- a/scripts/coccinelle/free/devm_free.cocci
+++ b/scripts/coccinelle/free/devm_free.cocci
@@ -56,9 +56,62 @@ expression x;
x = devm_ioport_map(...)
)
+@safe depends on context || org || report exists@
+expression x;
+position p;
+@@
+
+(
+ x = kmalloc(...)
+|
+ x = kvasprintf(...)
+|
+ x = kasprintf(...)
+|
+ x = kzalloc(...)
+|
+ x = kmalloc_array(...)
+|
+ x = kcalloc(...)
+|
+ x = kstrdup(...)
+|
+ x = kmemdup(...)
+|
+ x = get_free_pages(...)
+|
+ x = request_irq(...)
+|
+ x = ioremap(...)
+|
+ x = ioremap_nocache(...)
+|
+ x = ioport_map(...)
+)
+...
+(
+ kfree@p(x)
+|
+ kzfree@p(x)
+|
+ __krealloc@p(x, ...)
+|
+ krealloc@p(x, ...)
+|
+ free_pages@p(x, ...)
+|
+ free_page@p(x)
+|
+ free_irq@p(x)
+|
+ iounmap@p(x)
+|
+ ioport_unmap@p(x)
+)
+
@pb@
expression r.x;
-position p;
+position p != safe.p;
@@
(
next reply other threads:[~2018-02-01 10:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-01 9:48 Julia Lawall [this message]
2018-02-01 10:25 ` [PATCH] coccinelle: reduce false positives Dan Carpenter
2018-02-01 11:06 ` Julia Lawall
2018-02-01 11:16 ` Dan Carpenter
2018-02-01 12:28 ` Coccinelle: " SF Markus Elfring
2018-02-07 15:15 ` [PATCH] coccinelle: " Masahiro Yamada
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