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From: Denis Efremov <efremov@linux.com>
To: Julia Lawall <Julia.Lawall@lip6.fr>, Joe Perches <joe@perches.com>
Cc: cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org
Subject: [Cocci] [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER
Date: Sat, 30 May 2020 23:53:47 +0300	[thread overview]
Message-ID: <20200530205348.5812-2-efremov@linux.com> (raw)
In-Reply-To: <20200530205348.5812-1-efremov@linux.com>

Match GFP_USER allocations with memdup_user.cocci rule.
Commit 6c2c97a24f09 ("memdup_user(): switch to GFP_USER") switched
memdup_user() from GFP_KERNEL to GFP_USER. In most cases it is still
a good idea to use memdup_user() for GFP_KERNEL allocations. The
motivation behind altering memdup_user() to GFP_USER is here:
https://lkml.org/lkml/2018/1/6/333

Signed-off-by: Denis Efremov <efremov@linux.com>
---
 scripts/coccinelle/api/memdup_user.cocci | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci
index c809ab10bbce..49f487e6a5c8 100644
--- a/scripts/coccinelle/api/memdup_user.cocci
+++ b/scripts/coccinelle/api/memdup_user.cocci
@@ -20,7 +20,7 @@ expression from,to,size;
 identifier l1,l2;
 @@
 
--  to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL);
+-  to = \(kmalloc\|kzalloc\)(size,\(GFP_KERNEL\|GFP_USER\));
 +  to = memdup_user(from,size);
    if (
 -      to==NULL
@@ -43,7 +43,7 @@ position p;
 statement S1,S2;
 @@
 
-*  to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL);
+*  to = \(kmalloc@p\|kzalloc@p\)(size,\(GFP_KERNEL\|GFP_USER\));
    if (to==NULL || ...) S1
    if (copy_from_user(to, from, size) != 0)
    S2
-- 
2.26.2

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WARNING: multiple messages have this Message-ID (diff)
From: Denis Efremov <efremov@linux.com>
To: Julia Lawall <Julia.Lawall@lip6.fr>, Joe Perches <joe@perches.com>
Cc: Denis Efremov <efremov@linux.com>,
	cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER
Date: Sat, 30 May 2020 23:53:47 +0300	[thread overview]
Message-ID: <20200530205348.5812-2-efremov@linux.com> (raw)
In-Reply-To: <20200530205348.5812-1-efremov@linux.com>

Match GFP_USER allocations with memdup_user.cocci rule.
Commit 6c2c97a24f09 ("memdup_user(): switch to GFP_USER") switched
memdup_user() from GFP_KERNEL to GFP_USER. In most cases it is still
a good idea to use memdup_user() for GFP_KERNEL allocations. The
motivation behind altering memdup_user() to GFP_USER is here:
https://lkml.org/lkml/2018/1/6/333

Signed-off-by: Denis Efremov <efremov@linux.com>
---
 scripts/coccinelle/api/memdup_user.cocci | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci
index c809ab10bbce..49f487e6a5c8 100644
--- a/scripts/coccinelle/api/memdup_user.cocci
+++ b/scripts/coccinelle/api/memdup_user.cocci
@@ -20,7 +20,7 @@ expression from,to,size;
 identifier l1,l2;
 @@
 
--  to = \(kmalloc\|kzalloc\)(size,GFP_KERNEL);
+-  to = \(kmalloc\|kzalloc\)(size,\(GFP_KERNEL\|GFP_USER\));
 +  to = memdup_user(from,size);
    if (
 -      to==NULL
@@ -43,7 +43,7 @@ position p;
 statement S1,S2;
 @@
 
-*  to = \(kmalloc@p\|kzalloc@p\)(size,GFP_KERNEL);
+*  to = \(kmalloc@p\|kzalloc@p\)(size,\(GFP_KERNEL\|GFP_USER\));
    if (to==NULL || ...) S1
    if (copy_from_user(to, from, size) != 0)
    S2
-- 
2.26.2


  reply	other threads:[~2020-05-30 20:54 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-30 20:53 [Cocci] [PATCH 0/2] Update memdup_user.cocci Denis Efremov
2020-05-30 20:53 ` Denis Efremov
2020-05-30 20:53 ` Denis Efremov [this message]
2020-05-30 20:53   ` [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER Denis Efremov
2020-06-02 13:24   ` [Cocci] " Julia Lawall
2020-06-06  8:24   ` Julia Lawall
2020-06-06  8:24     ` Julia Lawall
2020-06-06 20:36     ` Denis Efremov
2020-06-06 20:36       ` Denis Efremov
2020-06-06 20:46     ` Denis Efremov
2020-06-06 20:46       ` Denis Efremov
2020-06-06 20:50       ` Julia Lawall
2020-06-06 20:50         ` Julia Lawall
2020-05-30 20:53 ` [Cocci] [PATCH 2/2] Coccinelle: extend memdup_user rule with vmemdup_user() Denis Efremov
2020-05-30 20:53   ` Denis Efremov
2020-06-06  9:27   ` [Cocci] " Julia Lawall
2020-06-06  9:27     ` Julia Lawall
  -- strict thread matches above, loose matches on Subject: below --
2020-05-31 17:36 [Cocci] [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER Markus Elfring

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