From: Anton Vasilyev <vasilyev@ispras.ru>
To: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Cc: Anton Vasilyev <vasilyev@ispras.ru>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
ldv-project@linuxtesting.org
Subject: [PATCH] media: davinci: vpif_display: Mix memory leak on probe error path
Date: Fri, 27 Jul 2018 14:52:20 +0300 [thread overview]
Message-ID: <20180727115220.10991-1-vasilyev@ispras.ru> (raw)
If vpif_probe() fails on v4l2_device_register() then memory allocated
at initialize_vpif() for global vpif_obj.dev[i] become unreleased.
The patch adds deallocation of vpif_obj.dev[i] on the error path and
removes duplicated check on platform_data presence.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
---
drivers/media/platform/davinci/vpif_display.c | 24 ++++++++++++-------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 7be636237acf..0f324055cc9f 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -1114,6 +1114,14 @@ static int initialize_vpif(void)
return err;
}
+static void free_vpif_objs(void)
+{
+ int i;
+
+ for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++)
+ kfree(vpif_obj.dev[i]);
+}
+
static int vpif_async_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
@@ -1255,11 +1263,6 @@ static __init int vpif_probe(struct platform_device *pdev)
return -EINVAL;
}
- if (!pdev->dev.platform_data) {
- dev_warn(&pdev->dev, "Missing platform data. Giving up.\n");
- return -EINVAL;
- }
-
vpif_dev = &pdev->dev;
err = initialize_vpif();
@@ -1271,7 +1274,7 @@ static __init int vpif_probe(struct platform_device *pdev)
err = v4l2_device_register(vpif_dev, &vpif_obj.v4l2_dev);
if (err) {
v4l2_err(vpif_dev->driver, "Error registering v4l2 device\n");
- return err;
+ goto vpif_free;
}
while ((res = platform_get_resource(pdev, IORESOURCE_IRQ, res_idx))) {
@@ -1314,7 +1317,10 @@ static __init int vpif_probe(struct platform_device *pdev)
if (vpif_obj.sd[i])
vpif_obj.sd[i]->grp_id = 1 << i;
}
- vpif_probe_complete();
+ err = vpif_probe_complete();
+ if (err) {
+ goto probe_subdev_out;
+ }
} else {
vpif_obj.notifier.subdevs = vpif_obj.config->asd;
vpif_obj.notifier.num_subdevs = vpif_obj.config->asd_sizes[0];
@@ -1334,6 +1340,8 @@ static __init int vpif_probe(struct platform_device *pdev)
kfree(vpif_obj.sd);
vpif_unregister:
v4l2_device_unregister(&vpif_obj.v4l2_dev);
+vpif_free:
+ free_vpif_objs();
return err;
}
@@ -1355,8 +1363,8 @@ static int vpif_remove(struct platform_device *device)
ch = vpif_obj.dev[i];
/* Unregister video device */
video_unregister_device(&ch->video_dev);
- kfree(vpif_obj.dev[i]);
}
+ free_vpif_objs();
return 0;
}
--
2.18.0
next reply other threads:[~2018-07-27 11:52 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-27 11:52 Anton Vasilyev [this message]
2018-08-02 9:51 ` [PATCH] media: davinci: vpif_display: Mix memory leak on probe error path Lad, Prabhakar
2018-08-06 15:50 ` [PATCH v2 1/2] " Anton Vasilyev
2018-08-06 15:50 ` [PATCH v2 2/2] media: davinci: vpif_display: remove duplicate check Anton Vasilyev
2018-08-13 11:46 ` Lad, Prabhakar
2018-08-13 11:47 ` [PATCH v2 1/2] media: davinci: vpif_display: Mix memory leak on probe error path Lad, Prabhakar
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