1 files changed, 77 insertions, 0 deletions
diff --git a/scripts/coccinelle/misc/badty.cocci b/scripts/coccinelle/misc/badty.cocci
new file mode 100644
index 000000000..ed3e0b8f3
--- /dev/null
+++ b/scripts/coccinelle/misc/badty.cocci
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/// Correct the size argument to alloc functions
+///
+//# This makes an effort to find cases where the argument to sizeof is wrong
+//# in memory allocation functions by checking the type of the allocated memory
+//# when it is a double pointer and ensuring the sizeof argument takes a pointer
+//# to the the memory being allocated. There are false positives in cases the
+//# sizeof argument is not used in constructing the return value. The result
+//# may need some reformatting.
+//
+// Confidence: Moderate
+// Copyright: (C) 2014 Himangi Saraogi.
+// Comments:
+// Options:
+
+virtual patch
+virtual context
+virtual org
+virtual report
+
+//----------------------------------------------------------
+//  For context mode
+//----------------------------------------------------------
+
+@depends on context disable sizeof_type_expr@
+type T;
+T **x;
+@@
+
+  x =
+  <+...sizeof(
+* T
+  )...+>
+
+//----------------------------------------------------------
+//  For patch mode
+//----------------------------------------------------------
+
+@depends on patch disable sizeof_type_expr@
+type T;
+T **x;
+@@
+
+  x =
+  <+...sizeof(
+- T
++ *x
+  )...+>
+
+//----------------------------------------------------------
+//  For org and report mode
+//----------------------------------------------------------
+
+@r depends on (org || report) disable sizeof_type_expr@
+type T;
+T **x;
+position p;
+@@
+
+  x =
+  <+...sizeof(
+  T@p
+  )...+>
+
+@script:python depends on org@
+p << r.p;
+@@
+
+coccilib.org.print_todo(p[0], "WARNING sizeof argument should be pointer type, not structure type")
+
+@script:python depends on report@
+p << r.p;
+@@
+
+msg="WARNING: Use correct pointer type argument for sizeof"
+coccilib.report.print_report(p[0], msg)
+