From 6f30ac9995ff662a2fee5eda4cd87dd0f0e337ba Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sun, 21 Feb 2021 12:11:54 +0200
Subject: [PATCH] Call softdep_prealloc() before taking ffs_lock_ea(), if
 unlock is committing

softdep_prealloc() must be called to ensure enough journal space is
available, before ffs_extwrite(). Also it must be done before taking
ffs_lock_ea(), because it calls ffs_syncvnode(), potentially dropping
the vnode lock.

Reviewed by:	mckusick
Tested by:	pho
MFC after:      1 week
Sponsored by:   The FreeBSD Foundation
---
 sys/ufs/ffs/ffs_vnops.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/sys/ufs/ffs/ffs_vnops.c b/sys/ufs/ffs/ffs_vnops.c
index 9be46951c04..050a6f66be1 100644
--- a/sys/ufs/ffs/ffs_vnops.c
+++ b/sys/ufs/ffs/ffs_vnops.c
@@ -1552,6 +1552,12 @@ struct vop_closeextattr_args {
 	if (ap->a_commit && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0)
 		return (EROFS);
 
+	if (ap->a_commit && DOINGSUJ(vp)) {
+		ASSERT_VOP_ELOCKED(vp, "ffs_closeextattr commit");
+		softdep_prealloc(vp, MNT_WAIT);
+		if (vp->v_data == NULL)
+			return (EBADF);
+	}
 	return (ffs_close_ea(vp, ap->a_commit, ap->a_cred, ap->a_td));
 }
 
@@ -1600,6 +1606,13 @@ vop_deleteextattr {
 		return (error);
 	}
 
+	if (DOINGSUJ(vp)) {
+		ASSERT_VOP_ELOCKED(vp, "ffs_deleteextattr");
+		softdep_prealloc(vp, MNT_WAIT);
+		if (vp->v_data == NULL)
+			return (EBADF);
+	}
+
 	error = ffs_open_ea(vp, ap->a_cred, ap->a_td);
 	if (error)
 		return (error);
@@ -1801,6 +1814,13 @@ vop_setextattr {
 		return (error);
 	}
 
+	if (DOINGSUJ(vp)) {
+		ASSERT_VOP_ELOCKED(vp, "ffs_deleteextattr");
+		softdep_prealloc(vp, MNT_WAIT);
+		if (vp->v_data == NULL)
+			return (EBADF);
+	}
+
 	error = ffs_open_ea(vp, ap->a_cred, ap->a_td);
 	if (error)
 		return (error);