From c3ae62ae08bb0db3639d8c579e4ff0967d908199 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Tue, 3 Aug 2010 17:22:20 -0400 Subject: [PATCH] SUNRPC: prevent task_cleanup running on freed xprt We saw a report of a NULL dereference in xprt_autoclose: https://bugzilla.redhat.com/show_bug.cgi?id=611938 This appears to be the result of an xprt's task_cleanup running after the xprt is destroyed. Nothing in the current code appears to prevent that. Signed-off-by: J. Bruce Fields Signed-off-by: Trond Myklebust --- net/sunrpc/xprt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 70297836a191..970fb00f388c 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -1131,6 +1131,7 @@ static void xprt_destroy(struct kref *kref) rpc_destroy_wait_queue(&xprt->sending); rpc_destroy_wait_queue(&xprt->resend); rpc_destroy_wait_queue(&xprt->backlog); + cancel_work_sync(&xprt->task_cleanup); /* * Tear down transport state and free the rpc_xprt */ -- 2.20.1