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authorAl Viro <viro@zeniv.linux.org.uk>2018-04-03 01:15:46 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-04-24 09:34:17 +0200
commit463f845986289852fa7a38a5ae78216a64b569c6 (patch)
treeb48af6fd45110b3e8b1bef4425fb21e8069d53fb
parente2210c5414a8e05e14c5864180ec215dec343828 (diff)
rpc_pipefs: fix double-dput()
commit 4a3877c4cedd95543f8726b0a98743ed8db0c0fb upstream. if we ever hit rpc_gssd_dummy_depopulate() dentry passed to it has refcount equal to 1. __rpc_rmpipe() drops it and dput() done after that hits an already freed dentry. Cc: stable@kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/sunrpc/rpc_pipe.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 61a504fb1ae2..34f94052c519 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1375,6 +1375,7 @@ rpc_gssd_dummy_depopulate(struct dentry *pipe_dentry)
struct dentry *clnt_dir = pipe_dentry->d_parent;
struct dentry *gssd_dir = clnt_dir->d_parent;
+ dget(pipe_dentry);
__rpc_rmpipe(d_inode(clnt_dir), pipe_dentry);
__rpc_depopulate(clnt_dir, gssd_dummy_info_file, 0, 1);
__rpc_depopulate(gssd_dir, gssd_dummy_clnt_dir, 0, 1);