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Message-ID: <Pine.LNX.4.64.1006011625510.12546@ask.diku.dk>
Date: Tue, 1 Jun 2010 16:34:20 +0200 (CEST)
From: Julia Lawall <julia@...u.dk>
To: David Woodhouse <dwmw2@...radead.org>,
Grant Likely <grant.likely@...retlab.ca>,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
devicetree-discuss@...ts.ozlabs.org,
kernel-janitors@...r.kernel.org
Subject: [PATCH 1/4] drivers/mtd/maps: introduce missing kfree
From: Julia Lawall <julia@...u.dk>
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@...u.dk>
---
drivers/mtd/maps/physmap_of.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index ba124ba..6ac5f9f 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -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)
--
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