summaryrefslogtreecommitdiffstats
path: root/scripts/coccinelle/api/alloc/alloc_cast.cocci
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /scripts/coccinelle/api/alloc/alloc_cast.cocci
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--scripts/coccinelle/api/alloc/alloc_cast.cocci123
1 files changed, 123 insertions, 0 deletions
diff --git a/scripts/coccinelle/api/alloc/alloc_cast.cocci b/scripts/coccinelle/api/alloc/alloc_cast.cocci
new file mode 100644
index 000000000..f6f0ccdb6
--- /dev/null
+++ b/scripts/coccinelle/api/alloc/alloc_cast.cocci
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/// 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
+// Copyright: (C) 2017 Himanshu Jha
+// 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 *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
+
+//----------------------------------------------------------
+// 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 *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
+
+//----------------------------------------------------------
+// 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 *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
+
+//----------------------------------------------------------
+// For org and report mode
+//----------------------------------------------------------
+
+@r2 depends on org || report@
+type T;
+position p;
+@@
+
+ (T@p *)
+ \(kmalloc\|kzalloc\|kcalloc\|kmem_cache_alloc\|kmem_cache_zalloc\|
+ kmem_cache_alloc_node\|kmalloc_node\|kzalloc_node\|vmalloc\|vzalloc\|
+ dma_alloc_coherent\|devm_kmalloc\|devm_kzalloc\|
+ kvmalloc\|kvzalloc\|kvmalloc_node\|kvzalloc_node\|pci_alloc_consistent\|
+ pci_zalloc_consistent\|kmem_alloc\|kmem_zalloc\|kmem_zone_alloc\|
+ kmem_zone_zalloc\|vmalloc_node\|vzalloc_node\)(...)
+
+@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)