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-rw-r--r--scripts/coccinelle/api/memdup.cocci66
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diff --git a/scripts/coccinelle/api/memdup.cocci b/scripts/coccinelle/api/memdup.cocci
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+++ b/scripts/coccinelle/api/memdup.cocci
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+// SPDX-License-Identifier: GPL-2.0-only
+/// Use kmemdup rather than duplicating its implementation
+///
+// Confidence: High
+// Copyright: (C) 2010-2012 Nicolas Palix.
+// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6.
+// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: --no-includes --include-headers
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+@r1@
+expression from,to;
+expression flag;
+position p;
+@@
+
+ to = \(kmalloc@p\|kzalloc@p\)(strlen(from) + 1,flag);
+
+@r2@
+expression x,from,to;
+expression flag,E1;
+position p;
+@@
+
+ x = strlen(from) + 1;
+ ... when != \( x = E1 \| from = E1 \)
+ to = \(kmalloc@p\|kzalloc@p\)(x,flag);
+
+@depends on patch@
+expression from,to,size,flag;
+position p != {r1.p,r2.p};
+statement S;
+@@
+
+- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
++ to = kmemdup(from,size,flag);
+ if (to==NULL || ...) S
+- memcpy(to, from, size);
+
+@r depends on !patch@
+expression from,to,size,flag;
+position p != {r1.p,r2.p};
+statement S;
+@@
+
+* to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+ if (to==NULL || ...) S
+* memcpy(to, from, size);
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING opportunity for kmemdup")
+
+@script:python depends on report@
+p << r.p;
+@@
+
+coccilib.report.print_report(p[0], "WARNING opportunity for kmemdup")