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authorWeston Andros Adamson <dros@primarydata.com>2014-01-19 22:45:36 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:01 -0800
commitdaab6e7df44ba7d4281379c6ac5780e10d133286 (patch)
tree56bc1ddb126e05f153a631a2c0d8817b235cc71b /fs
parent14ff66ce27e91666bf55e415104fdec9f9b18668 (diff)
downloadlinaro-lsk-daab6e7df44ba7d4281379c6ac5780e10d133286.tar.gz
nfs4: fix discover_server_trunking use after free
commit abad2fa5ba67725a3f9c376c8cfe76fbe94a3041 upstream. If clp is new (cl_count = 1) and it matches another client in nfs4_discover_server_trunking, the nfs_put_client will free clp before ->cl_preserve_clid is set. Signed-off-by: Weston Andros Adamson <dros@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4client.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 3afae905922..02773aab43c 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -240,13 +240,11 @@ struct nfs_client *nfs4_init_client(struct nfs_client *clp,
error = nfs4_discover_server_trunking(clp, &old);
if (error < 0)
goto error;
- nfs_put_client(clp);
- if (clp != old) {
- clp->cl_preserve_clid = true;
- clp = old;
- }
- return clp;
+ if (clp != old)
+ clp->cl_preserve_clid = true;
+ nfs_put_client(clp);
+ return old;
error:
nfs_mark_client_ready(clp, error);