| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 14/65] drivers/media/media-devnode: clear private_data before put_device() | Date | Tue, 26 May 2020 20:52:33 +0200 |
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From: Max Kellermann <max@duempel.org>
commit bf244f665d76d20312c80524689b32a752888838 upstream.
Callbacks invoked from put_device() may free the struct media_devnode pointer, so any cleanup needs to be done before put_device().
Signed-off-by: Max Kellermann <max@duempel.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/media/media-devnode.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/media-devnode.c b/drivers/media/media-devnode.c index a8cb52dc8c4f..6c56aebd8db0 100644 --- a/drivers/media/media-devnode.c +++ b/drivers/media/media-devnode.c @@ -197,10 +197,11 @@ static int media_release(struct inode *inode, struct file *filp) if (mdev->fops->release) mdev->fops->release(filp); + filp->private_data = NULL; + /* decrease the refcount unconditionally since the release() return value is ignored. */ put_device(&mdev->dev); - filp->private_data = NULL; return 0; } -- 2.25.1
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