From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Wed, 3 Oct 2012 00:09:00 +0000 (-0700)
Subject: NFSv4: nfs4_open_done first must check that GETATTR decoded a file type
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=807d66d80221920729a8d4abfa04246546a6d3fa;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

NFSv4: nfs4_open_done first must check that GETATTR decoded a file type

...before it can check the validity of that file type.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 21cfac7c2ff8..68438aa4f08e 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1537,7 +1537,8 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata)
 		return;
 
 	if (task->tk_status == 0) {
-		switch (data->o_res.f_attr->mode & S_IFMT) {
+		if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
+			switch (data->o_res.f_attr->mode & S_IFMT) {
 			case S_IFREG:
 				break;
 			case S_IFLNK:
@@ -1548,6 +1549,7 @@ static void nfs4_open_done(struct rpc_task *task, void *calldata)
 				break;
 			default:
 				data->rpc_status = -ENOTDIR;
+			}
 		}
 		renew_lease(data->o_res.server, data->timestamp);
 		if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))