Messages in this thread | | | Date | Mon, 25 Jul 2016 09:06:48 +0200 | From | Borislav Petkov <> | Subject | Re: [PATCH] arch/x86/kernel/cpu/microcode/intel: don't store initrd's start |
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On Sun, Jul 24, 2016 at 05:05:49PM +0200, Nicolai Stange wrote: > On x86_64 with CONFIG_RANDOMIZE_MEMORY and CONFIG_MICROCODE_INTEL, > I get the following splat upon booting on an Intel i7-4800MQ:
Before we dive into this, let's establish which tree you're exactly testing...
> > Call Trace: > [<ffffffffb6054cea>] ? find_microcode_patch+0x4a/0xa0 > [<ffffffffb6055487>] load_microcode.isra.1.constprop.12+0x37/0xa0 > [...] > [<ffffffffb60557cd>] load_ucode_intel_ap+0x5d/0x80 > [<ffffffffb6054924>] load_ucode_ap+0x94/0xa0 > [<ffffffffb60481a8>] cpu_init+0x58/0x3e0 > [<ffffffffb60709bc>] ? set_pte_vaddr+0x5c/0x90 > [<ffffffffb6fac06c>] trap_init+0x2b6/0x328 > [<ffffffffb6fa0dba>] start_kernel+0x224/0x47f > [<ffffffffb6fa0120>] ? early_idt_handler_array+0x120/0x120 > [<ffffffffb6fa02cf>] x86_64_start_reservations+0x29/0x2b > [<ffffffffb6fa041e>] x86_64_start_kernel+0x14d/0x170 > [...] > RIP [<ffffffffb6055af5>] has_newer_microcode+0x5/0x20 > [...] > ---[ end trace b163fd3960fd46fb ]--- > Kernel panic - not syncing: Attempted to kill the idle task! > ---[ end Kernel panic - not syncing: Attempted to kill the idle task! > > It can be bisected to commit 21ef9a5c3164 ("Merge branch 'x86/microcode'").
This commit 21ef9a5c3164 does not exist - the current merge commit corresponding to this is
commit 2a2a745e2d248498a21ba3876d2481e90c7fe0a5 Merge: caaaa222620c eb06158ee145 Author: Ingo Molnar <mingo@kernel.org> Date: Sun Jul 24 08:26:41 2016 +0200
Merge branch 'x86/microcode'
> Both of its parents, i.e. > commit f5846c92b0a5 ("Merge branch 'x86/headers'")
This commit does not exist either.
> and > commit eb06158ee145 ("x86/microcode: Remove unused symbol exports")
This one does.
> work fine by themselves. > "Cross-bisecting" between v4.7-rc6..f5846c92b0a5 and v4.7-rc6..eb06158ee145 > reveals the conflicting commits: > commit 021182e52fe0 ("x86/mm: Enable KASLR for physical mapping memory > regions") > and > commit 6c5456474e7f ("x86/microcode: Fix loading precedence").
Those two too.
So it seems you're either testing an older tip/master or some linux-next.
So let's clarify what exactly you're testing before we do anything else.
Thanks.
-- Regards/Gruss, Boris.
ECO tip #101: Trim your mails when you reply. --
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