[PATCH v2 07/51] lockd: don't hand out the terminator of nlm_end_grace

[Christian Brauner]

nlm_end_grace_read() answers with "Y\n" or "N\n" from a three byte
buffer and hands out all three bytes, the terminating NUL included.
Leave the NUL out.

Fixes: d68e3c4aa416 ("lockd: add a /proc/fs/lockd/nlm_end_grace file")
Signed-off-by: Christian Brauner (Amutable) <brau...@kernel.org>
---
 fs/lockd/procfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/lockd/procfs.c b/fs/lockd/procfs.c
index a01f08c8c2f3..74f7ab77535a 100644
--- a/fs/lockd/procfs.c
+++ b/fs/lockd/procfs.c
@@ -57,7 +57,7 @@ nlm_end_grace_read(struct file *file, char __user *buf, 
size_t size,
        resp[1] = '\n';
        resp[2] = '\0';
 
-       return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp));
+       return simple_read_from_buffer(buf, size, pos, resp, sizeof(resp) - 1);
 }
 
 static const struct proc_ops lockd_end_grace_proc_ops = {

-- 
2.53.0