diff options
| author | Misono Tomohiro <misono.tomohiro@jp.fujitsu.com> | 2019-08-28 17:01:22 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-24 07:57:24 +0200 |
| commit | 4d92b525f600e7f1bbf4abffb4dd722933302e29 (patch) | |
| tree | f1ac3288605cdaef5e123fd9596733d1c813401e | |
| parent | 4f42e1a43030528fb67849e306cb1fe16b542166 (diff) | |
NFS: direct.c: Fix memory leak of dreq when nfs_get_lock_context fails
[ Upstream commit 8605cf0e852af3b2c771c18417499dc4ceed03d5 ]
When dreq is allocated by nfs_direct_req_alloc(), dreq->kref is
initialized to 2. Therefore we need to call nfs_direct_req_release()
twice to release the allocated dreq. Usually it is called in
nfs_file_direct_{read, write}() and nfs_direct_complete().
However, current code only calls nfs_direct_req_relese() once if
nfs_get_lock_context() fails in nfs_file_direct_{read, write}().
So, that case would result in memory leak.
Fix this by adding the missing call.
Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/nfs/direct.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 88cb8e0d6014..7789f0b9b999 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -605,6 +605,7 @@ ssize_t nfs_file_direct_read(struct kiocb *iocb, struct iov_iter *iter, l_ctx = nfs_get_lock_context(dreq->ctx); if (IS_ERR(l_ctx)) { result = PTR_ERR(l_ctx); + nfs_direct_req_release(dreq); goto out_release; } dreq->l_ctx = l_ctx; @@ -1015,6 +1016,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter) l_ctx = nfs_get_lock_context(dreq->ctx); if (IS_ERR(l_ctx)) { result = PTR_ERR(l_ctx); + nfs_direct_req_release(dreq); goto out_release; } dreq->l_ctx = l_ctx; |