mddev->sync_thread can be set to NULL on kzalloc failure downstream.
The patch checks for such a scenario and frees allocated resources.

Signed-off-by: Aditya Pakki <redacted>
---
  drivers/md/raid10.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index abb5d382f64d..f52b4d9bcd24 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c

@@ -3939,6 +3939,8 @@ static int raid10_run(struct mddev *mddev)
  		set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
  		mddev->sync_thread = md_register_thread(md_do_sync, mddev,
  							"reshape");
+		if (!mddev->sync_thread)
+			goto out_free_conf;
  	}
  
  	return 0;