OCI: Oracle Linux [UEK-5] Panicks With: "BUG: Bad page state in process lvm pfn:cbea9d1"

Applies To:

Oracle Linux - Version 7 or later with UEK5

Symptoms:

UEK5 can suffer from memory corruption panic.

[229802.917409] loop: module loaded
[229803.641151] BUG: Bad page state in process lvm  pfn:cbea9d1
[229803.647710] page:ffffdb4d6faa7440 count:1 mapcount:0 mapping:          (null) index:0x0
[229803.656955] flags: 0x57ffffc0000100(slab)
[229803.661748] raw: 0057ffffc0000100 0000000000000000 0000000000000000 0000000100800080
[229803.670711] raw: dead000000000100 dead000000000200 ffff9e52efd75880 0000000000000000
[229803.679763] page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set
[229803.687204] bad because of flags: 0x100(slab)
[229803.692295] Modules linked in: ...
[229803.692349] CPU: 92 PID: 399299 Comm: lvm Not tainted 4.14.35-2047.514.5.1.2.el7uek.x86_64 #2
[229803.692350] Hardware name: Oracle Corporation ORACLE SERVER X8-2/ASM,MB,X8-2, BIOS 51070700 06/23/2022
[229803.692350] Call Trace:
[229803.692358]  dump_stack+0x6d/0x89
[229803.692363]  bad_page+0x100/0x126
[229803.692364]  free_pages_check_bad+0x76/0x78
[229803.692366]  __free_pages_ok+0x2f9/0x2ff
[229803.692369]  ? alloc_completed_exception+0x40/0x40 [dm_snapshot]
[229803.692371]  __free_pages+0x19/0x27
[229803.692372]  free_pages.part.82+0x3f/0x41
[229803.692373]  free_pages+0x13/0x16
[229803.692375]  free_buffer+0x93/0xb0 [dm_bufio]
[229803.692377]  __free_buffer_wake+0x8b/0x90 [dm_bufio]
[229803.692378]  ? alloc_completed_exception+0x40/0x40 [dm_snapshot]
[229803.692380]  dm_bufio_forget+0x62/0x80 [dm_bufio]
[229803.692381]  persistent_read_metadata+0x3a8/0x540 [dm_snapshot]
[229803.692383]  snapshot_ctr+0x649/0x6d0 [dm_snapshot]
[229803.692389]  dm_table_add_target+0x1b4/0x420 [dm_mod]
[229803.692393]  table_load+0x147/0x380 [dm_mod]
[229803.692396]  ctl_ioctl+0x21c/0x5e0 [dm_mod]
[229803.692398]