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authorJulia Lawall <julia@diku.dk>2009-09-11 18:22:27 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2009-09-15 12:02:34 -0700
commit542f491542b0312f8b28e17a013f6f8f114bda68 (patch)
treede01a059423c6bb313db0ee72e0f3497d263888b
parent2bb6a12a88aeac9bab4ed0cf0da1edc03f5eb686 (diff)
Staging: iio: introduce missing kfree
Error handling code following a kmalloc or kzalloc 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>
-rw-r--r--drivers/staging/iio/accel/lis3l02dq_ring.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/staging/iio/accel/lis3l02dq_ring.c b/drivers/staging/iio/accel/lis3l02dq_ring.c
index c21198d..a6b7c72 100644
--- a/drivers/staging/iio/accel/lis3l02dq_ring.c
+++ b/drivers/staging/iio/accel/lis3l02dq_ring.c
@@ -286,6 +286,7 @@ static void lis3l02dq_trigger_bh_to_ring(struct work_struct *work_s)
rx_array = kmalloc(4 * (st->indio_dev->scan_count), GFP_KERNEL);
if (rx_array == NULL) {
dev_err(&st->us->dev, "memory alloc failed in ring bh");
+ kfree(data);
return;
}