[PATCH 5.13 033/800] gfs2: Fix error handling in init_statfs

[Greg Kroah-Hartman]

From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>

commit 5d49d3508b3c67201bd3e1bf7f4ef049111b7051 upstream.

On an error path, init_statfs calls iput(pn) after pn has already been put.
Fix that by setting pn to NULL after the initial iput.

Fixes: 97fd734ba17e ("gfs2: lookup local statfs inodes prior to journal recovery")
Cc: stable@xxxxxxxxxxxxxxx # v5.10+
Reported-by: Jing Xiangfeng <jingxiangfeng@xxxxxxxxxx>
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/gfs2/ops_fstype.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -687,6 +687,7 @@ static int init_statfs(struct gfs2_sbd *
 	}
 
 	iput(pn);
+	pn = NULL;
 	ip = GFS2_I(sdp->sd_sc_inode);
 	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0,
 				   &sdp->sd_sc_gh);