X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=fs%2Fsuper.c;h=7c140ee60c547f78327394aef7c92ce539f4ee8e;hb=refs%2Fheads%2Fsandbox%2Flstelmach%2Fvirgl;hp=8d39e4f11cfa3c431d32952eb168bc7a7426ffc7;hpb=ab57bc6f027c761d5411fae9492756b5fbb91108;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/fs/super.c b/fs/super.c
index 8d39e4f..7c140ee 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -476,13 +476,22 @@ void generic_shutdown_super(struct super_block *sb)
 
 		cgroup_writeback_umount();
 
-		/* evict all inodes with zero refcount */
+		/* Evict all inodes with zero refcount. */
 		evict_inodes(sb);
-		/* only nonzero refcount inodes can have marks */
+
+		/*
+		 * Clean up and evict any inodes that still have references due
+		 * to fsnotify or the security policy.
+		 */
 		fsnotify_sb_delete(sb);
-		fscrypt_destroy_keyring(sb);
 		security_sb_delete(sb);
 
+		/*
+		 * Now that all potentially-encrypted inodes have been evicted,
+		 * the fscrypt keyring can be destroyed.
+		 */
+		fscrypt_destroy_keyring(sb);
+
 		if (sb->s_dio_done_wq) {
 			destroy_workqueue(sb->s_dio_done_wq);
 			sb->s_dio_done_wq = NULL;
@@ -491,10 +500,23 @@ void generic_shutdown_super(struct super_block *sb)
 		if (sop->put_super)
 			sop->put_super(sb);
 
-		if (!list_empty(&sb->s_inodes)) {
-			printk("VFS: Busy inodes after unmount of %s. "
-			   "Self-destruct in 5 seconds.  Have a nice day...\n",
-			   sb->s_id);
+		if (CHECK_DATA_CORRUPTION(!list_empty(&sb->s_inodes),
+				"VFS: Busy inodes after unmount of %s (%s)",
+				sb->s_id, sb->s_type->name)) {
+			/*
+			 * Adding a proper bailout path here would be hard, but
+			 * we can at least make it more likely that a later
+			 * iput_final() or such crashes cleanly.
+			 */
+			struct inode *inode;
+
+			spin_lock(&sb->s_inode_list_lock);
+			list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
+				inode->i_op = VFS_PTR_POISON;
+				inode->i_sb = VFS_PTR_POISON;
+				inode->i_mapping = VFS_PTR_POISON;
+			}
+			spin_unlock(&sb->s_inode_list_lock);
 		}
 	}
 	spin_lock(&sb_lock);