1// SPDX-License-Identifier: GPL-2.0-only 2/// The various basic memory allocation functions don't return ERR_PTR 3/// 4// Confidence: High 5// Copyright: (C) 2010-2012 Nicolas Palix. 6// Copyright: (C) 2010-2012 Julia Lawall, INRIA/LIP6. 7// Copyright: (C) 2010-2012 Gilles Muller, INRIA/LiP6. 8// URL: http://coccinelle.lip6.fr/ 9// Comments: 10// Options: --no-includes --include-headers 11 12virtual patch 13virtual context 14virtual org 15virtual report 16 17@depends on patch@ 18expression x,E; 19@@ 20 21x = \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\)(...) 22... when != x = E 23- IS_ERR(x) 24+ !x 25 26@r depends on !patch exists@ 27expression x,E; 28position p1,p2; 29@@ 30 31*x = \(kmalloc@p1\|kzalloc@p1\|kcalloc@p1\|kmem_cache_alloc@p1\|kmem_cache_zalloc@p1\|kmem_cache_alloc_node@p1\|kmalloc_node@p1\|kzalloc_node@p1\)(...) 32... when != x = E 33* IS_ERR@p2(x) 34 35@script:python depends on org@ 36p1 << r.p1; 37p2 << r.p2; 38@@ 39 40cocci.print_main("alloc call",p1) 41cocci.print_secs("IS_ERR that should be NULL tests",p2) 42 43@script:python depends on report@ 44p1 << r.p1; 45p2 << r.p2; 46@@ 47 48msg = "ERROR: allocation function on line %s returns NULL not ERR_PTR on failure" % (p1[0].line) 49coccilib.report.print_report(p2[0], msg) 50