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