From: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
commit 4bab69093044ca81f394bd0780be1b71c5a4d308 upstream.
When try_module_get() fails in the nvme_dev_open() it returns without
releasing the ctrl reference which was taken earlier.
Put the ctrl reference which is taken before calling the
try_module_get() in the error return code path.
Fixes: 52a3974feb1a "nvme-core: get/put ctrl and transport module in nvme_dev_open/release()"
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Reviewed-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nvme/host/core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3061,8 +3061,10 @@ static int nvme_dev_open(struct inode *i
}
nvme_get_ctrl(ctrl);
- if (!try_module_get(ctrl->ops->module))
+ if (!try_module_get(ctrl->ops->module)) {
+ nvme_put_ctrl(ctrl);
return -EINVAL;
+ }
file->private_data = ctrl;
return 0;
