Use kmemdup_user rather than duplicating its implementation This is a little bit restricted to reduce false positives Signed-off-by: Nicolas Palix <npalix@xxxxxxx> Signed-off-by: Julia Lawall <julia@xxxxxxx> --- scripts/coccinelle/api/memdup_user.cocci | 35 ++++++++++++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-) create mode 100644 scripts/coccinelle/api/memdup_user.cocci diff --git a/scripts/coccinelle/api/memdup_user.cocci b/scripts/coccinelle/api/memdup_user.cocci new file mode 100644 index 0000000..72ce012 --- /dev/null +++ b/scripts/coccinelle/api/memdup_user.cocci @@ -0,0 +1,35 @@ +/// Use kmemdup_user rather than duplicating its implementation +/// This is a little bit restricted to reduce false positives +/// +// Confidence: High +// Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2. +// Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2. +// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2. +// URL: http://coccinelle.lip6.fr/ +// Comments: +// Options: -no_includes -include_headers + +virtual patch + +@@ +expression from,to,size,flag; +position p; +identifier l1,l2; +@@ + +- to = \(kmalloc@p\|kzalloc@p\)(size,flag); ++ to = memdup_user(from,size); + if ( +- to==NULL ++ IS_ERR(to) + || ...) { + <+... when != goto l1; +- -ENOMEM ++ PTR_ERR(to) + ...+> + } +- if (copy_from_user(to, from, size) != 0) { +- <+... when != goto l2; +- -EFAULT +- ...+> +- } -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
