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coccinelle
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kmerr.cocci
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/// This semantic patch looks for kmalloc etc that are not followed by a /// NULL check. It only gives a report in the case where there is some /// error handling code later in the function, which may be helpful /// in determining what the error handling code for the call to kmalloc etc /// should be. /// // Confidence: High // Copyright: (C) 2010 Nicolas Palix, DIKU. GPLv2. // Copyright: (C) 2010 Julia Lawall, DIKU. GPLv2. // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6. GPLv2. // URL: http://coccinelle.lip6.fr/ // Comments: // Options: --no-includes --include-headers virtual context virtual org virtual report @withtest@ expression x; position p; identifier f,fld; @@ x@p = f(...); ... when != x->fld \(x == NULL \| x != NULL\) @fixed depends on context && !org && !report@ expression x,x1; position p1 != withtest.p; statement S; position any withtest.p; identifier f; @@ *x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... *x1@p = f(...); if (!x1) S // ------------------------------------------------------------------------ @rfixed depends on (org || report) && !context exists@ expression x,x1; position p1 != withtest.p; position p2; statement S; position any withtest.p; identifier f; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... x1@p = f@p2(...); if (!x1) S @script:python depends on org@ p1 << rfixed.p1; p2 << rfixed.p2; @@ cocci.print_main("alloc call",p1) cocci.print_secs("possible model",p2) @script:python depends on report@ p1 << rfixed.p1; p2 << rfixed.p2; @@ msg = "alloc with no test, possible model on line %s" % (p2[0].line) coccilib.report.print_report(p1[0],msg)