Messages in this thread | | | Date | Fri, 6 Oct 2017 21:39:56 -0400 | From | Steven Rostedt <> | Subject | [BUG] GPF on reboot of box |
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Starting with v4.14-rc1 my box crashes during a reboot. All I get is the following:
[ 250.615793] sd 0:0:0:0: [sda] Synchronizing SCSI cache [ 250.635639] reboot: Restarting system [ 250.639671] reboot: machine restart [ 250.643842] general protection fault: 0000 [#1] PREEMPT SMP KASAN
Then nothing. No reboot, it just hangs there.
I bisected it down to this commit:
660da7c9228f ("x86/mm: Enable CR4.PCIDE on supported systems")
If I comment out the setting of X86_CR4_PCIDE in that commit, it boots fine. But...
I noticed that commit c7ad5ad29 ("x86/mm/64: Initialize CR4.PCIDE early") moved the problem code from arch/x86/kernel/cpu/common.c to arch/x86/mm/init.c
If I comment it out in v4.14-rc1, it crashes on boot up.
It appears that my box doesn't like having X86_CR4_PCIDE set. it causes reboot to fail. But it also appears that setting that is required for some other code to work.
Help!
-- Steve
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