diff options
| author | Anton Vasilyev <vasilyev@ispras.ru> | 2018-07-27 13:52:20 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2018-08-03 01:14:25 +0200 |
| commit | 61e641f36ed81ae473177c085f0bfd83ad3b55ed (patch) | |
| tree | e9fa32c30d1d74ee69ddbfe7a26e4a703921271b /drivers/media | |
| parent | media: vimc: Remove redundant free (diff) | |
| download | linux-61e641f36ed81ae473177c085f0bfd83ad3b55ed.tar.xz linux-61e641f36ed81ae473177c085f0bfd83ad3b55ed.zip | |
media: davinci: vpif_display: Mix memory leak on probe error path
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>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/platform/davinci/vpif_display.c | 24 |
1 files 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 @@ vpif_init_free_channel_objects: 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 @@ probe_subdev_out: 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; } |