diff options
| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2020-05-20 15:03:06 +0300 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2020-05-20 13:11:41 +0100 |
| commit | 128516e49de67d10d52fba62ef8d482b220ac4b0 (patch) | |
| tree | d25a43c9f67961a039543aab7bbd967c4687f33d /drivers/iio/dummy | |
| parent | irqchip/gic-v3-its: Balance initial LPI affinity across CPUs (diff) | |
| download | linux-dev-128516e49de67d10d52fba62ef8d482b220ac4b0.tar.xz linux-dev-128516e49de67d10d52fba62ef8d482b220ac4b0.zip | |
iio: dummy_evgen: Fix use after free on error in iio_dummy_evgen_create()
We need to preserve the "iio_evgen->irq_sim_domain" error code before
we free "iio_evgen" otherwise it leads to a use after free.
Fixes: 337cbeb2c13e ("genirq/irq_sim: Simplify the API")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'drivers/iio/dummy')
| -rw-r--r-- | drivers/iio/dummy/iio_dummy_evgen.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iio/dummy/iio_dummy_evgen.c b/drivers/iio/dummy/iio_dummy_evgen.c index 409fe0f7df1c..ee85d596e528 100644 --- a/drivers/iio/dummy/iio_dummy_evgen.c +++ b/drivers/iio/dummy/iio_dummy_evgen.c @@ -45,6 +45,8 @@ static struct iio_dummy_eventgen *iio_evgen; static int iio_dummy_evgen_create(void) { + int ret; + iio_evgen = kzalloc(sizeof(*iio_evgen), GFP_KERNEL); if (!iio_evgen) return -ENOMEM; @@ -52,8 +54,9 @@ static int iio_dummy_evgen_create(void) iio_evgen->irq_sim_domain = irq_domain_create_sim(NULL, IIO_EVENTGEN_NO); if (IS_ERR(iio_evgen->irq_sim_domain)) { + ret = PTR_ERR(iio_evgen->irq_sim_domain); kfree(iio_evgen); - return PTR_ERR(iio_evgen->irq_sim_domain); + return ret; } mutex_init(&iio_evgen->lock); |