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badty.cocci
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/// Use ARRAY_SIZE instead of dividing sizeof array with sizeof an element /// //# 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. GPLv2. // 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 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)