Messages in this thread Patch in this message | | | From | Julia Lawall <> | Subject | [PATCH 6/6] drivers/video/bfin-lq035q1-fb.c: introduce missing kfree | Date | Fri, 1 Apr 2011 16:23:47 +0200 |
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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>
--- drivers/video/bfin-lq035q1-fb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/video/bfin-lq035q1-fb.c b/drivers/video/bfin-lq035q1-fb.c index c8e1f04..23b6c4b 100644 --- a/drivers/video/bfin-lq035q1-fb.c +++ b/drivers/video/bfin-lq035q1-fb.c @@ -154,8 +154,10 @@ static int __devinit lq035q1_spidev_probe(struct spi_device *spi) ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON); ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode); - if (ret) + if (ret) { + kfree(ctl); return ret; + } spi_set_drvdata(spi, ctl);
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