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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | /// Remove casting the values returned by memory allocation functions /// like kmalloc, kzalloc, kmem_cache_alloc, kmem_cache_zalloc etc. /// //# This makes an effort to find cases of casting of values returned by //# kmalloc, kzalloc, kcalloc, kmem_cache_alloc, kmem_cache_zalloc, //# kmem_cache_alloc_node, kmalloc_node and kzalloc_node and removes //# the casting as it is not required. The result in the patch case may //# need some reformatting. // // Confidence: High // Copyright: (C) 2014 Himangi Saraogi GPLv2. // Copyright: (C) 2017 Himanshu Jha GPLv2. // Comments: // Options: --no-includes --include-headers // virtual context virtual patch virtual org virtual report @initialize:python@ @@ import re pattern = '__' m = re.compile(pattern) @r1 depends on context || patch@ type T; @@ (T *) \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\| kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) //---------------------------------------------------------- // For context mode //---------------------------------------------------------- @script:python depends on context@ t << r1.T; @@ if m.search(t) != None: cocci.include_match(False) @depends on context && r1@ type r1.T; @@ * (T *) \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\| kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) //---------------------------------------------------------- // For patch mode //---------------------------------------------------------- @script:python depends on patch@ t << r1.T; @@ if m.search(t) != None: cocci.include_match(False) @depends on patch && r1@ type r1.T; @@ - (T *) \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\| kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) //---------------------------------------------------------- // For org and report mode //---------------------------------------------------------- @r2 depends on org || report@ type T; position p; @@ (T@p *) \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\| kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\| dma_alloc_coherent\|dma_zalloc_coherent\|devm_kmalloc\|devm_kzalloc\| kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\| pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\| kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...) @script:python depends on org@ p << r2.p; t << r2.T; @@ if m.search(t) != None: cocci.include_match(False) else: coccilib.org.print_safe_todo(p[0], t) @script:python depends on report@ p << r2.p; t << r2.T; @@ if m.search(t) != None: cocci.include_match(False) else: msg="WARNING: casting value returned by memory allocation function to (%s *) is useless." % (t) coccilib.report.print_report(p[0], msg) |