Oracle Linux: UEK5 Crashes at prefetch_freepointer.isra.60+0x11/0x1a When PSI is Enabled (Doc ID 2690275.1)

Last updated on JULY 15, 2020

Applies to:

Symptoms

On UEK5, when PSI is enabled, booting fails with the following trace:

[ 0.949183] general protection fault: 0000 [#1] SMP PTI
[ 0.949952] Modules linked in:
[ 0.950433] CPU: 0 PID: 176 Comm: loadkeys Not tainted 4.14.35-1902.303.5.3.el7uek.x86_64 #2
[ 0.951591] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 0.952723] task: ffff8c9979780000 task.stack: ffffac5d804ec000
[ 0.953545] RIP: 0010:prefetch_freepointer.isra.60+0x11/0x1a
[ 0.954333] RSP: 0018:ffffac5d804efc90 EFLAGS: 00010286
[ 0.955052] RAX: 0000000000000000 RBX: f200f200f01bf27e RCX: 0000000000001559
[ 0.956083] RDX: 0000000000001558 RSI: f200f200f01bf27e RDI: ffff8c997d002020
[ 0.957023] RBP: ffffac5d804efc90 R08: 0000000000028140 R09: 0000000000000000
[ 0.958009] R10: ffff8c997d002000 R11: 0000000000000000 R12: 00000000014000c0
[ 0.958958] R13: ffffffff83500691 R14: ffff8c997d002000 R15: ffff8c9936606400
[ 0.959918] FS: 00007f7d438b5740(0000) GS:ffff8c997fc00000(0000) knlGS:0000000000000000
[ 0.961022] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 0.961801] CR2: 00007ffd155e30a0 CR3: 0000000036618000 CR4: 00000000000406f0
[ 0.962748] Call Trace:
[ 0.963156] kmem_cache_alloc_trace+0xa0/0x1dd
[ 0.963799] vt_do_kdsk_ioctl+0xe1/0x391
[ 0.964396] vt_ioctl+0xe52/0x10c0
[ 0.964894] ? tlb_flush_mmu+0x97/0xfc
[ 0.965453] ? arch_tlb_finish_mmu+0x1b/0xcb
[ 0.966047] tty_ioctl+0xf2/0x8e8
[ 0.966548] ? cred_has_capability+0x72/0x11e
[ 0.967170] do_vfs_ioctl+0xaa/0x602
[ 0.967726] ? do_munmap+0x29a/0x38c
[ 0.968260] SyS_ioctl+0x79/0x84
[ 0.968759] do_syscall_64+0x79/0x1b9
[ 0.969304] entry_SYSCALL_64_after_hwframe+0x169/0x0
[ 0.970005] RIP: 0033:0x7f7d433c1307
[ 0.970568] RSP: 002b:00007ffccc865c18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 0.971615] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f7d433c1307
[ 0.972550] RDX: 00007ffccc865c50 RSI: 0000000000004b47 RDI: 0000000000000003
[ 0.973485] RBP: 0000000000000004 R08: 0000000000000000 R09: 000000000132b4c0
[ 0.974729] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
[ 0.975708] R13: 0000000000000003 R14: 0000000000000015 R15: 0000000000000015
[ 0.976656] Code: 31 d2 e8 13 ec ff ff 5b 41 5c 5d c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 85 f6 48 89 e5 74 0a 48 63 07 <48> 8b 04 06 0f 18 08 5d c3 66 0f 1f 44 00 00 55 48 89 e5 41 57
[ 0.979093] RIP: prefetch_freepointer.isra.60+0x11/0x1a RSP: ffffac5d804efc90
[ 0.980080] ---[ end trace a3fd7b0d4cc0dcd5 ]---
[ 0.980726] Kernel panic - not syncing: Fatal exception
[ 0.981468] Shutting down iommu.
[ 0.981996] Kernel Offset: 0x2000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 0.983391] ---[ end Kernel panic - not syncing: Fatal exception

Changes

PSI is enabled in grub:

Cause

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