• Julia Lawall's avatar
    arch/powerpc/sysdev/fsl_rmu.c: introduce missing kfree · c6ca52ad
    Julia Lawall authored
    rmu needs to be freed before leaving the function in an error case.
    
    A simplified version of the semantic match that finds the problem is as
    follows: (http://coccinelle.lip6.fr)
    
    // <smpl>
    @r exists@
    local idexpression x;
    statement S;
    identifier f1;
    position p1,p2;
    expression *ptr != NULL;
    @@
    
    x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
    ...
    if (x == NULL) S
    <... when != x
         when != if (...) { <+...x...+> }
    x->f1
    ...>
    (
     return \(0\|<+...x...+>\|ptr\);
    |
     return@p2 ...;
    )
    
    @script:python@
    p1 << r.p1;
    p2 << r.p2;
    @@
    
    print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
    // </smpl>
    Signed-off-by: default avatarJulia Lawall <julia@diku.dk>
    Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
    c6ca52ad
fsl_rmu.c 29.2 KB