Comment 17 for bug 1440536

From dann's reports:

1) system1
Code: 14000012 f9400273 b4000213 d1002274 (b9402280)

2) system2
Code: 14000012 f9400273 b4000213 d1002274 (b9402280)

And the upstem report in #15,
Code: 14000003 f9400273 b4000213 d1002274 (b9402282)

The code snippet should be the following in __d_lookup(): fs/dcache.c

ffffffc0001aae68: 14000003 b ffffffc0001aae74 <__d_lookup+0x84>
         *
         * See Documentation/filesystems/path-lookup.txt for more details.
         */
        rcu_read_lock();

        hlist_bl_for_each_entry_rcu(dentry, node, b, d_hash) {
ffffffc0001aae6c: f9400273 ldr x19, [x19]
ffffffc0001aae70: b40001f3 cbz x19, ffffffc0001aaeac <__d_lookup+0xbc>

                if (dentry->d_name.hash != hash)
ffffffc0001aae74: d1002274 sub x20, x19, #0x8
ffffffc0001aae78: b9402282 ldr w2, [x20,#32] #faulted instruction

Then the problem should be caused by bad pointer of dcache.