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Commit c0bd50e2 authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: fix null pointer dereference in send_mds_reconnect() 



sb->s_root can be null when umounting

Signed-off-by: default avatarYan, Zheng <zyan@redhat.com>
parent 32ec4397

fs/ceph/mds_client.c

+2 −1
Original line number Diff line number Diff line
@@ -2892,6 +2892,7 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, 
	spin_unlock(&session->s_cap_lock);



	/* trim unused caps to reduce MDS's cache rejoin time */

	if (mdsc->fsc->sb->s_root)

		shrink_dcache_parent(mdsc->fsc->sb->s_root);



	ceph_con_close(&session->s_con);