[PATCH 3.12 37/60] NFSv4: Fix memory and state leak in _nfs4_open_and_get_state

[Jiri Slaby]

From: Trond Myklebust <trond.mykleb...@primarydata.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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.mykleb...@primarydata.com>
Signed-off-by: Anna Schumaker <anna.schuma...@netapp.com>
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
---
 fs/nfs/nfs4proc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a94ec130003b..907d363337eb 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2169,6 +2169,7 @@ 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);
 
@@ -2191,7 +2192,6 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata 
*opendata,
        if (ret != 0)
                goto out;
 
-       ctx->state = state;
        if (dentry->d_inode == state->inode) {
                nfs_inode_attach_open_context(ctx);
                if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
-- 
2.12.0