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[media] drivers/media/video/atmel-isi.c: eliminate a null pointer dereference 

The variable isi might be null or might be freed at the point of the call
to clk_put.  pclk contains the value that isi->pclk is expected to point to.

The semantic match that finds this problem is as follows:

// <smpl>
@r@
expression E, E1;
identifier f;
statement S1,S2,S3;
@@

if (E == NULL)
{
  ... when != if (E == NULL || ...) S1 else S2
      when != E = E1
*E->f
  ... when any
  return ...;
}
else S3
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Julia Lawall 2011-10-28 19:58:16 -03:00 committed by Mauro Carvalho Chehab
parent 0d37d35035
commit 0a4524d726
1 changed files with 1 additions and 1 deletions
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2
drivers/media/video/atmel-isi.c
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@ -1036,7 +1036,7 @@ static int __devinit atmel_isi_probe(struct platform_device *pdev)
err_alloc_descriptors:
kfree(isi);
err_alloc_isi:
clk_put(isi->pclk);
clk_put(pclk);
return ret;
}