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drivers/mtd/maps: introduce missing kfree

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Error handling code following a kmalloc should free the allocated data.

The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@

x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...x...+> }
(
x->f1 = E
|
 (x->f1 == NULL || ...)
|
 f(...,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: Julia Lawall <julia@diku.dk>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Julia Lawall 2010-06-01 16:34:20 +02:00 committed by David Woodhouse
parent b51adeae29
commit 00b275dbfc
1 changed files with 3 additions and 3 deletions
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6
drivers/mtd/maps/physmap_of.c
View file

@ -353,7 +353,7 @@ static int __devinit of_flash_probe(struct of_device *dev,
&info->parts, 0);
if (err < 0) {
of_free_probes(part_probe_types);
return err;
goto err_out;
}
of_free_probes(part_probe_types);
@ -361,14 +361,14 @@ static int __devinit of_flash_probe(struct of_device *dev,
if (err == 0) {
err = of_mtd_parse_partitions(&dev->dev, dp, &info->parts);
if (err < 0)
return err;
goto err_out;
}
#endif
if (err == 0) {
err = parse_obsolete_partitions(dev, info, dp);
if (err < 0)
return err;
goto err_out;
}
if (err > 0)