[PATCH] gfs2: Don't clear sb->s_fs_info in gfs2_sys_fs_add()

[Andrew Price <anprice@redhat.com>]

When gfs2_sys_fs_add() fails it sets sb->s_fs_info to NULL which results
in a NULL pointer deref in gfs2_drop_inode() when iput(sdp->sd_inode) is
called in the gfs2_fill_super() error path. Remove the NULL assignment
from gfs2_sys_fs_add() and let gfs2_fill_super() deal with it instead,
after the iput().

Fixes: ae9f3bd8259a ("gfs2: replace sd_aspace with sd_inode")
Reported-by: syzbot+b12826218502df019f9d@syzkaller.appspotmail.com
Signed-off-by: Andrew Price <anprice@redhat.com>
---
 fs/gfs2/sys.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 748125653d6c..c3c8842920d2 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -764,7 +764,6 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 	fs_err(sdp, "error %d adding sysfs files\n", error);
 	kobject_put(&sdp->sd_kobj);
 	wait_for_completion(&sdp->sd_kobj_unregister);
-	sb->s_fs_info = NULL;
 	return error;
 }
 
-- 
2.49.0