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
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: 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 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci
next prev parent reply other threads:[~2020-05-30 20:54 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-30 20:53 [PATCH 0/2] Update memdup_user.cocci Denis Efremov 2020-05-30 20:53 ` [Cocci] " Denis Efremov 2020-05-30 20:53 ` Denis Efremov [this message] 2020-05-30 20:53 ` [Cocci] [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER Denis Efremov 2020-06-02 13:24 ` 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 ` [PATCH 2/2] Coccinelle: extend memdup_user rule with vmemdup_user() Denis Efremov 2020-05-30 20:53 ` [Cocci] " Denis Efremov 2020-06-06 9:27 ` Julia Lawall 2020-06-06 9:27 ` Julia Lawall 2020-05-31 17:36 [PATCH 1/2] Coccinelle: extend memdup_user transformation with GFP_USER Markus Elfring 2020-05-31 17:36 ` Markus Elfring
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