exofs: oops after late failure in mount

We have already set ->s_root, so ->put_super() is going to be called.
Freeing ->s_fs_info is a bloody bad idea when it's going to be
dereferenced very shortly...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 8addfe314dc7..d22cd168c6ee 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -838,6 +838,8 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
         ret = bdi_setup_and_register(&sbi->bdi, "exofs", BDI_CAP_MAP_COPY);
         if (ret) {
                 EXOFS_DBGMSG("Failed to bdi_setup_and_register\n");
+                dput(sb->s_root);
+                sb->s_root = NULL;
                 goto free_sbi;
         }