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| author | Misono Tomohiro <misono.tomohiro@jp.fujitsu.com> | 2019-08-28 11:01:22 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-03-22 23:47:58 +0300 |
| commit | 8605cf0e852af3b2c771c18417499dc4ceed03d5 (patch) | |
| tree | a644b130b68252f95d1f2203c9aa08dc395ab563 | |
| parent | 3cab1854b0c05c77f2d119d0ab70d3c33c9d5c61 (diff) | |
| download | linux-8605cf0e852af3b2c771c18417499dc4ceed03d5.tar.xz | |
NFS: direct.c: Fix memory leak of dreq when nfs_get_lock_context fails
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>
| -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 b768a0b42e82..ade2435551c8 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -571,6 +571,7 @@ 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; @@ -990,6 +991,7 @@ 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; |