NFSv4: Fix memory and state leak in _nfs4_open_and_get_state

commit a974deee477af89411e0f80456bfb344ac433c98 upstream.

If we exit because the file access check failed, we currently
leak the struct nfs4_state. We need to attach it to the
open context before returning.

Fixes: 3efb9722475e ("NFSv4: Refactor _nfs4_open_and_get_state..")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 9a524e763c3e40907cc482d7e2af487c30bbee00..ae0ec51dc0271ff902128e120e8b9ef79f696f1f 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2452,6 +2452,7 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
        ret = PTR_ERR(state);
        if (IS_ERR(state))
                goto out;
+       ctx->state = state;
        if (server->caps & NFS_CAP_POSIX_LOCK)
                set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
 
@@ -2474,7 +2475,6 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
        if (ret != 0)
                goto out;
 
-       ctx->state = state;
        if (d_inode(dentry) == state->inode) {
                nfs_inode_attach_open_context(ctx);
                if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))