Re: [BUG] Kernel panic on >= 4.12 because of NX

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On a booted 5.2.5, at the point where I see the panic I get :

[    0.183953] efi: Error mapping PA 0x0 -> VA 0x0!
[    0.183956] efi: Error mapping PA 0x90000 -> VA 0x90000!
[    0.183959] efi: Error mapping PA 0x100000 -> VA 0x100000!
[    0.183961] efi: Error mapping PA 0x2165000 -> VA 0x2165000!
[    0.183963] efi: Error mapping PA 0x2200000 -> VA 0x2200000!
[    0.183966] efi: Error mapping PA 0x4265000 -> VA 0x4265000!
[    0.183968] efi: Error mapping PA 0x30ae7000 -> VA 0x30ae7000!
[    0.183971] efi: Error mapping PA 0x3456b000 -> VA 0x3456b000!
[    0.183973] efi: Error mapping PA 0x5d590000 -> VA 0x5d590000!
[    0.183975] efi: Error mapping PA 0x7c84e000 -> VA 0x7c84e000!
[    0.183978] efi: Error mapping PA 0x7c864000 -> VA 0x7c864000!
[    0.183980] efi: Error mapping PA 0x7c86f000 -> VA 0x7c86f000!
[    0.183982] efi: Error mapping PA 0x7c891000 -> VA 0x7c891000!
[    0.183985] efi: Error mapping PA 0x7c8cb000 -> VA 0x7c8cb000!
[    0.183987] efi: Error mapping PA 0x7c8d0000 -> VA 0x7c8d0000!
[    0.183989] efi: Error mapping PA 0x7d0d6000 -> VA 0x7d0d6000!
[    0.183992] efi: Error mapping PA 0x7d0d9000 -> VA 0x7d0d9000!
[    0.183994] efi: Error mapping PA 0x7d0de000 -> VA 0x7d0de000!
[    0.183996] efi: Error mapping PA 0x7d0df000 -> VA 0x7d0df000!
[    0.183999] efi: Error mapping PA 0x7d11c000 -> VA 0x7d11c000!
[    0.184001] efi: Error mapping PA 0x7d11d000 -> VA 0x7d11d000!
[    0.184003] efi: Error mapping PA 0x7e776000 -> VA 0x7e776000!
[    0.184006] efi: Error mapping PA 0x7e78b000 -> VA 0x7e78b000!
[    0.184008] efi: Error mapping PA 0x7e7cb000 -> VA 0x7e7cb000!
[    0.184010] efi: Error mapping PA 0x7e7cc000 -> VA 0x7e7cc000!
[    0.184013] efi: Error mapping PA 0x7e7d6000 -> VA 0x7e7d6000!
[    0.184015] efi: Error mapping PA 0x7e7d9000 -> VA 0x7e7d9000!
[    0.184017] efi: Error mapping PA 0x7e7dd000 -> VA 0x7e7dd000!
[    0.184020] efi: Error mapping PA 0x7e7e0000 -> VA 0x7e7e0000!
[    0.184022] efi: Error mapping PA 0x7e7e2000 -> VA 0x7e7e2000!
[    0.184025] efi: Error mapping PA 0x7e7e3000 -> VA 0x7e7e3000!
[    0.184027] efi: Error mapping PA 0x7e7e6000 -> VA 0x7e7e6000!
[    0.184029] efi: Error mapping PA 0x7e7e9000 -> VA 0x7e7e9000!
[    0.184032] efi: Error mapping PA 0x7e7eb000 -> VA 0x7e7eb000!
[    0.184034] efi: Error mapping PA 0x7e7ec000 -> VA 0x7e7ec000!
[    0.184036] efi: Error mapping PA 0x7e801000 -> VA 0x7e801000!
[    0.184039] efi: Error mapping PA 0x7e812000 -> VA 0x7e812000!
[    0.184041] efi: Error mapping PA 0x7e823000 -> VA 0x7e823000!
[    0.184043] efi: Error mapping PA 0x7e82b000 -> VA 0x7e82b000!
[    0.184046] efi: Error mapping PA 0x7e82e000 -> VA 0x7e82e000!
[    0.184048] efi: Error mapping PA 0x7e831000 -> VA 0x7e831000!
[    0.184050] efi: Error mapping PA 0x7e94d000 -> VA 0x7e94d000!
[    0.184053] efi: Error mapping PA 0x7e96f000 -> VA 0x7e96f000!
[    0.184055] efi: Error mapping PA 0x7e997000 -> VA 0x7e997000!
[    0.184057] efi: Error mapping PA 0x7e9a4000 -> VA 0x7e9a4000!
[    0.184060] efi: Error mapping PA 0x7e9b2000 -> VA 0x7e9b2000!
[    0.184062] efi: Error mapping PA 0x7ec26000 -> VA 0x7ec26000!
[    0.184065] efi: Error mapping PA 0x7ec27000 -> VA 0x7ec27000!
[    0.184067] efi: Error mapping PA 0x7f5f7000 -> VA 0x7f5f7000!
[    0.184069] efi: Error mapping PA 0x7f6f7000 -> VA 0x7f6f7000!
[    0.184072] efi: Error mapping PA 0x7f7e1000 -> VA 0x7f7e1000!
[    0.184074] efi: Error mapping PA 0x7f7f7000 -> VA 0x7f7f7000!
[    0.184076] efi: Error mapping PA 0x7f8ca000 -> VA 0x7f8ca000!
[    0.184079] efi: Error mapping PA 0x7f8f7000 -> VA 0x7f8f7000!
[    0.184081] efi: Error mapping PA 0x7fb7b000 -> VA 0x7fb7b000!
[    0.184083] efi: Error mapping PA 0x7fb89000 -> VA 0x7fb89000!
[    0.184086] efi: Error mapping PA 0x7fbbb000 -> VA 0x7fbbb000!
[    0.184088] efi: Error mapping PA 0x7fbbc000 -> VA 0x7fbbc000!
[    0.184091] efi: Error mapping PA 0x100000000 -> VA 0x100000000!
[    0.184093] efi: Error mapping PA 0xfff90000 -> VA 0xfff90000!
[    0.184097] efi: Error ident-mapping new memmap (0x17b5a4000)!

Le mar. 6 août 2019 à 11:39, Antoine Reversat <a.reversat@xxxxxxxxx> a écrit :
Sorry for the maybe not so helpful title.

Here is the problem :
I'm running Linux on a Mac pro 1,1 (the first x86 mac pro). It's a dual xeon 5150 with ECC ram. I have 2 ram kits in it : 2x512M and 2x2G (this one : http://www.ec.kingston.com/ecom/hyperx_us/partsinfo.asp?root=&ktcpartno=KTA-MP667AK2/4G)

If I only have the 2x512M kit everything works fine for all kernel versions but if I have both kits or just the 2x2G kit any kernel above 4.10 panics very early on (picture of said panic https://imgur.com/a/PipU5Oc). The picture was taken on 4.15 (using earlyprintk=efi,keep) on other versions even using earlyprintk I don't get any output.

I have been trying several kernels and everything up to 4.11 works no problem. Then on 4.11 I got a panic which mentionned NX and pages being in W+X which prompted me to try noexec=off on newer versions and that fixes the panic. This works up to 5.2.5.

/proc/cpuinfo reports that the CPU support the NX flag.

I would need help in order to troubleshoot this further.

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