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author | Julia Lawall <Julia.Lawall@lip6.fr> | 2012-10-21 11:52:00 +0100 |
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committer | Jonathan Cameron <jic23@kernel.org> | 2012-11-17 10:17:20 +0000 |
commit | e3db9ef6eb39ac6d969787bc15756778c2c5ca66 (patch) | |
tree | a7252ad7c63ba80a924983bad6b3fd3be3fe6c84 /drivers/iio | |
parent | e8f45e3341ed8609174f9c21fb47e202f29ab039 (diff) | |
download | linux-e3db9ef6eb39ac6d969787bc15756778c2c5ca66.tar.gz |
drivers/iio/industrialio-event.c: eliminate possible double free
The function __iio_add_event_config_attrs is only called once, by the function iio_device_register_eventset. If the call fails, iio_device_register_eventset calls __iio_remove_event_config_attrs. There is thus no need for __iio_add_event_config_attrs to also call __iio_remove_event_config_attrs on failure. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r-- | drivers/iio/industrialio-event.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c index 857e6306c5c3..261cae00557e 100644 --- a/drivers/iio/industrialio-event.c +++ b/drivers/iio/industrialio-event.c @@ -350,15 +350,10 @@ static inline int __iio_add_event_config_attrs(struct iio_dev *indio_dev) ret = iio_device_add_event_sysfs(indio_dev, &indio_dev->channels[j]); if (ret < 0) - goto error_clear_attrs; + return ret; attrcount += ret; } return attrcount; - -error_clear_attrs: - __iio_remove_event_config_attrs(indio_dev); - - return ret; } static bool iio_check_for_dynamic_events(struct iio_dev *indio_dev) |