From 66f09ca717e7905e0eebe000b86e27d0274b95ac Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 2 Sep 2014 13:58:58 -0400 Subject: [PATCH] nfs: do not start the callback thread until we set rqstp->rq_task This fixes an Oopsable race when starting up the callback server. Signed-off-by: Trond Myklebust Reviewed-by: Jeff Layton Signed-off-by: J. Bruce Fields --- fs/nfs/callback.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index e3dd1cd175d9..b8fb3a4ef649 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -235,7 +235,7 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, cb_info->serv = serv; cb_info->rqst = rqstp; - cb_info->task = kthread_run(callback_svc, cb_info->rqst, + cb_info->task = kthread_create(callback_svc, cb_info->rqst, "nfsv4.%u-svc", minorversion); if (IS_ERR(cb_info->task)) { ret = PTR_ERR(cb_info->task); @@ -245,6 +245,7 @@ static int nfs_callback_start_svc(int minorversion, struct rpc_xprt *xprt, return ret; } rqstp->rq_task = cb_info->task; + wake_up_process(cb_info->task); dprintk("nfs_callback_up: service started\n"); return 0; } -- GitLab