Dear Linux folks,
On 01/03/19 22:45, Paul Menzel wrote: > On the server board Asus KGPE-D16 with AMD Opteron 6278 processor updating > the microcode update in the firmware from 0x0600062e to 0x0600063e seems to > cause a general protection fault with Linux 4.14.87 and 4.20-rc7. > >> 46.859: [ 7.573240] microcode: CPU31: patch_level=0x0600063e >> 46.859: [ 7.578507] microcode: Microcode Update Driver: v2.2. >> 46.860: [ 7.578539] sched_clock: Marking stable (6510054745, >> 1068444659)->(7999876773, -421377369) >> 46.860: [ 7.593013] registered taskstats version 1 >> 46.861: [ 7.598091] rtc_cmos 00:00: setting system clock to 2000-01-01 >> 08:01:51 UTC (946713711) >> 46.862: [ 7.606575] ALSA device list: >> 46.862: [ 7.609802] No soundcards found. >> 46.865: [ 7.615887] Freeing unused kernel image memory: 1564K >> 46.871: [ 7.627073] Write protecting the kernel read-only data: 20480k >> 46.872: [ 7.634366] Freeing unused kernel image memory: 2016K >> 46.873: [ 7.640297] Freeing unused kernel image memory: 584K >> 46.874: [ 7.645521] Run /init as init process >> 46.877: [ 7.652262] general protection fault: 0000 [#1] SMP NOPTI >> 46.877: [ 7.657931] CPU: 18 PID: 0 Comm: swapper/18 Not tainted >> 4.20.0-rc7.mx64.237 #1 >> 46.877: [ 7.665514] Hardware name: ASUS KGPE-D16/KGPE-D16, BIOS >> 4.9-103-g637bef2037 01/02/2019 >> 46.878: [ 7.673804] RIP: 0010:switch_mm_irqs_off+0xb2/0x640 >> 46.878: [ 7.678948] Code: 48 c1 ef 09 83 e7 01 48 09 c7 65 48 8b 05 8e 34 >> fc 7e 48 39 c7 74 15 48 09 f8 a8 01 74 0e b9 49 00 00 00 b8 01 00 00 00 31 >> d2 <0f> 30 65 48 89 3d 6c 34 fc 7e 8b 05 9a ef a7 01 85 c0 0f 8f 41 04 >> 46.879: [ 7.698394] RSP: 0018:ffffc90006343e20 EFLAGS: 00010046 >> 46.879: [ 7.703844] RAX: 0000000000000001 RBX: ffff88981ca0b800 RCX: >> 0000000000000049 >> 46.879: [ 7.711238] RDX: 0000000000000000 RSI: ffff88981b87cf80 RDI: >> ffff88981ca0b800 >> 46.880: [ 7.718665] RBP: ffffc90006343e70 R08: 00000001c81bec00 R09: >> 0000000000000000 >> 46.880: [ 7.726092] R10: ffffc90006343e88 R11: 0000000000000000 R12: >> ffffffff82479b40 >> 46.880: [ 7.733494] R13: 0000000000000000 R14: 0000000000000012 R15: >> ffff88981dd50080 >> 46.881: [ 7.740853] FS: 0000000000000000(0000) GS:ffff88981fa80000(0000) >> knlGS:0000000000000000 >> 46.881: [ 7.749318] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> 46.881: [ 7.755281] CR2: 0000000000000000 CR3: 000000000240a000 CR4: >> 00000000000406e0 >> 46.881: [ 7.762761] Call Trace: >> 46.881: [ 7.765369] ? __schedule+0x1b9/0x7b0 >> 46.882: [ 7.769253] __schedule+0x1b9/0x7b0 >> 46.882: [ 7.772930] schedule_idle+0x1e/0x40 >> 46.882: [ 7.776744] do_idle+0x146/0x200 >> 46.882: [ 7.780181] cpu_startup_entry+0x19/0x20 >> 46.883: [ 7.784274] start_secondary+0x183/0x1b0 >> 46.883: [ 7.788409] secondary_startup_64+0xa4/0xb0 >> 46.883: [ 7.792766] Modules linked in: >> 46.883: [ 7.796105] ---[ end trace a423e363fe1ecf67 ]--- >> 46.884: [ 7.800939] RIP: 0010:switch_mm_irqs_off+0xb2/0x640 >> 46.884: [ 7.806048] Code: 48 c1 ef 09 83 e7 01 48 09 c7 65 48 8b 05 8e 34 >> fc 7e 48 39 c7 74 15 48 09 f8 a8 01 74 0e b9 49 00 00 00 b8 01 00 00 00 31 >> d2 <0f> 30 65 48 89 3d 6c 34 fc 7e 8b 05 9a ef a7 01 85 c0 0f 8f 41 04 >> 46.884: [ 7.825440] RSP: 0018:ffffc90006343e20 EFLAGS: 00010046 >> 46.885: [ 7.830855] RAX: 0000000000000001 RBX: ffff88981ca0b800 RCX: >> 0000000000000049 >> 46.885: [ 7.838230] RDX: 0000000000000000 RSI: ffff88981b87cf80 RDI: >> ffff88981ca0b800 >> 46.885: [ 7.845614] RBP: ffffc90006343e70 R08: 00000001c81bec00 R09: >> 0000000000000000 >> 46.886: [ 7.853047] R10: ffffc90006343e88 R11: 0000000000000000 R12: >> ffffffff82479b40 >> 46.886: [ 7.860427] R13: 0000000000000000 R14: 0000000000000012 R15: >> ffff88981dd50080 >> 46.886: [ 7.867862] FS: 0000000000000000(0000) GS:ffff88981fa80000(0000) >> knlGS:0000000000000000 >> 46.886: [ 7.876320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> 46.887: [ 7.882351] CR2: 0000000000000000 CR3: 000000000240a000 CR4: >> 00000000000406e0 >> 46.887: [ 7.889746] Kernel panic - not syncing: Attempted to kill the >> idle task! >> 46.888: [ 7.896907] Kernel Offset: disabled >> 46.888: [ 7.900558] ---[ end Kernel panic - not syncing: Attempted to >> kill the idle task! ]--- > > Please find the whole log, including the coreboot messages, attached. The > time stamps in the beginning are from the script `readserial.py` from the > SeaBIOS repository. > > Do you have an idea what is going on, and how to fix it? Decoding the code, give the output below. ``` $ scripts/decodecode < /dev/shm/test.log [ 7.806048] Code: 48 c1 ef 09 83 e7 01 48 09 c7 65 48 8b 05 8e 34 fc 7e 48 39 c7 74 15 48 09 f8 a8 01 74 0e b9 49 00 00 00 b8 01 00 00 00 31 d2 <0f> 30 65 48 89 3d 6c 34 fc 7e 8b 05 9a ef a7 01 85 c0 0f 8f 41 04 All code ======== 0: 48 c1 ef 09 shr $0x9,%rdi 4: 83 e7 01 and $0x1,%edi 7: 48 09 c7 or %rax,%rdi a: 65 48 8b 05 8e 34 fc mov %gs:0x7efc348e(%rip),%rax # 0x7efc34a0 11: 7e 12: 48 39 c7 cmp %rax,%rdi 15: 74 15 je 0x2c 17: 48 09 f8 or %rdi,%rax 1a: a8 01 test $0x1,%al 1c: 74 0e je 0x2c 1e: b9 49 00 00 00 mov $0x49,%ecx 23: b8 01 00 00 00 mov $0x1,%eax 28: 31 d2 xor %edx,%edx 2a:* 0f 30 wrmsr <-- trapping instruction 2c: 65 48 89 3d 6c 34 fc mov %rdi,%gs:0x7efc346c(%rip) # 0x7efc34a0 33: 7e 34: 8b 05 9a ef a7 01 mov 0x1a7ef9a(%rip),%eax # 0x1a7efd4 3a: 85 c0 test %eax,%eax 3c: 0f .byte 0xf 3d: 8f 41 04 popq 0x4(%rcx) Code starting with the faulting instruction =========================================== 0: 0f 30 wrmsr 2: 65 48 89 3d 6c 34 fc mov %rdi,%gs:0x7efc346c(%rip) # 0x7efc3476 9: 7e a: 8b 05 9a ef a7 01 mov 0x1a7ef9a(%rip),%eax # 0x1a7efaa 10: 85 c0 test %eax,%eax 12: 0f .byte 0xf 13: 8f 41 04 popq 0x4(%rcx) ``` So the problem is with the instruction *wrmsr* [1]. The content of ECX, which according to [1] is written to, is not in the logs though, as far as I can see. Kind regards, Paul [1]: https://www.felixcloutier.com/x86/wrmsr
smime.p7s
Description: S/MIME Cryptographic Signature
