From 04ddefd79a5cd410d65b7a30593ac915b9fab687 Mon Sep 17 00:00:00 2001
From: Yihao Wu wuyihao@linux.alibaba.com Date: Wed, 6 Mar 2019 21:03:50 +0800 Subject: [PATCH] nfsd: fix wrong check in write_v4_end_grace()
Commit 62a063b8e7d1 "nfsd4: fix crash on writing v4_end_grace before nfsd startup" is trying to fix a NULL dereference issue, but it mistakenly checks if the nfsd server is started. So fix it.
Fixes: 62a063b8e7d1 "nfsd4: fix crash on writing v4_end_grace before nfsd startup" Cc: stable@vger.kernel.org Reviewed-by: Joseph Qi joseph.qi@linux.alibaba.com Signed-off-by: Yihao Wu wuyihao@linux.alibaba.com --- fs/nfsd/nfsctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 72a7681..f2feb2d 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -1126,7 +1126,7 @@ static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size) case 'Y': case 'y': case '1': - if (nn->nfsd_serv) + if (!nn->nfsd_serv) return -EBUSY; nfsd4_end_grace(nn); break;