1// SPDX-License-Identifier: GPL-2.0-only
  2/// Remove casting the values returned by memory allocation functions
  3/// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc.
  4///
  5//# This makes an effort to find cases of casting of values returned by
  6//# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
  7//# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
  8//# the casting as it is not required. The result in the patch case may
  9//# need some reformatting.
 10//
 11// Confidence: High
 12// Copyright: (C) 2014 Himangi Saraogi
 13// Copyright: (C) 2017 Himanshu Jha
 14// Comments:
 15// Options: --no-includes --include-headers
 16//
 17
 18virtual context
 19virtual patch
 20virtual org
 21virtual report
 22
 23@initialize:python@
 24@@
 25import re
 26pattern = '__'
 27m = re.compile(pattern)
 28
 29@r1 depends on context || patch@
 30type T;
 31@@
 32
 33  (T *)
 34  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 35   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 36   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 37   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 38   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 39   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 40
 41//----------------------------------------------------------
 42//  For context mode
 43//----------------------------------------------------------
 44
 45@script:python depends on context@
 46t << r1.T;
 47@@
 48
 49if m.search(t) != None:
 50        cocci.include_match(False)
 51
 52@depends on context && r1@
 53type r1.T;
 54@@
 55
 56* (T *)
 57  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 58   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 59   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 60   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 61   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 62   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 63
 64//----------------------------------------------------------
 65//  For patch mode
 66//----------------------------------------------------------
 67
 68@script:python depends on patch@
 69t << r1.T;
 70@@
 71
 72if m.search(t) != None:
 73        cocci.include_match(False)
 74
 75@depends on patch && r1@
 76type r1.T;
 77@@
 78
 79- (T *)
 80  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 81   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 82   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 83   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 84   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 85   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 86
 87//----------------------------------------------------------
 88//  For org and report mode
 89//----------------------------------------------------------
 90
 91@r2 depends on org || report@
 92type T;
 93position p;
 94@@
 95
 96 (T@p *)
 97  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 98   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 99   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
100   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
101   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
102   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
103
104@script:python depends on org@
105p << r2.p;
106t << r2.T;
107@@
108
109if m.search(t) != None:
110	cocci.include_match(False)
111else:
112	coccilib.org.print_safe_todo(p[0], t)
113
114@script:python depends on report@
115p << r2.p;
116t << r2.T;
117@@
118
119if m.search(t) != None:
120	cocci.include_match(False)
121else:
122	msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t)
123	coccilib.report.print_report(p[0], msg)

  1// SPDX-License-Identifier: GPL-2.0-only
  2/// Remove casting the values returned by memory allocation functions
  3/// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc.
  4///
  5//# This makes an effort to find cases of casting of values returned by
  6//# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc,
  7//# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes
  8//# the casting as it is not required. The result in the patch case may
  9//# need some reformatting.
 10//
 11// Confidence: High
 12// Copyright: (C) 2014 Himangi Saraogi
 13// Copyright: (C) 2017 Himanshu Jha
 14// Comments:
 15// Options: --no-includes --include-headers
 16//
 17
 18virtual context
 19virtual patch
 20virtual org
 21virtual report
 22
 23@initialize:python@
 24@@
 25import re
 26pattern = '__'
 27m = re.compile(pattern)
 28
 29@r1 depends on context || patch@
 30type T;
 31@@
 32
 33  (T *)
 34  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 35   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 36   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 37   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 38   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 39   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 40
 41//----------------------------------------------------------
 42//  For context mode
 43//----------------------------------------------------------
 44
 45@script:python depends on context@
 46t << r1.T;
 47@@
 48
 49if m.search(t) != None:
 50        cocci.include_match(False)
 51
 52@depends on context && r1@
 53type r1.T;
 54@@
 55
 56* (T *)
 57  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 58   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 59   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 60   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 61   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 62   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 63
 64//----------------------------------------------------------
 65//  For patch mode
 66//----------------------------------------------------------
 67
 68@script:python depends on patch@
 69t << r1.T;
 70@@
 71
 72if m.search(t) != None:
 73        cocci.include_match(False)
 74
 75@depends on patch && r1@
 76type r1.T;
 77@@
 78
 79- (T *)
 80  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 81   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 82   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
 83   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
 84   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
 85   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
 86
 87//----------------------------------------------------------
 88//  For org and report mode
 89//----------------------------------------------------------
 90
 91@r2 depends on org || report@
 92type T;
 93position p;
 94@@
 95
 96 (T@p *)
 97  \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
 98   kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
 99   dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
100   kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
101   pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
102   kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
103
104@script:python depends on org@
105p << r2.p;
106t << r2.T;
107@@
108
109if m.search(t) != None:
110	cocci.include_match(False)
111else:
112	coccilib.org.print_safe_todo(p[0], t)
113
114@script:python depends on report@
115p << r2.p;
116t << r2.T;
117@@
118
119if m.search(t) != None:
120	cocci.include_match(False)
121else:
122	msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t)
123	coccilib.report.print_report(p[0], msg)