Re: [Xen-devel] OOPS new Xen 4.9.0_08 / kernel 4.12.0 Dom0 crash @ domain_crash_sync called from entry.S: fault at ffff82d080342328 entry.o#create_bounce_frame+0x135/0x14d

[PGNet Dev <pgnet.dev@xxxxxxxxx>]

Hi

On 7/4/17 12:54 PM, Andrew Cooper wrote:
> On 04/07/17 20:48, PGNet Dev wrote:
>>      [    0.000000] NX (Execute Disable) protection: active
>>      [    0.000000] efi: EFI v2.31 by American Megatrends
>>      [    0.000000] efi:  ESRT=0x9ef8d998  ACPI 2.0=0x9e819000  
>> ACPI=0x9e819000  SMBIOS=0xf04c0  MPS=0xfd490
>>      (XEN) [2017-07-04 19:08:39] d0v0 Unhandled invalid opcode fault/trap 
>> [#6, ec=ffffffff]
>>      (XEN) [2017-07-04 19:08:39] domain_crash_sync called from entry.S: 
>> fault at ffff82d080342328 entry.o#create_bounce_frame+0x135/0x14d
>>      (XEN) [2017-07-04 19:08:39] Domain 0 (vcpu#0) crashed on cpu#0:
>>      (XEN) [2017-07-04 19:08:39] ----[ Xen-4.9.0_08-512  x86_64  debug=n   
>> Tainted:  C   ]----
>>      (XEN) [2017-07-04 19:08:39] CPU:    0
>>      (XEN) [2017-07-04 19:08:39] RIP:    e033:[<ffffffff822b8e5b>]
> 
> Please look up 0xffffffff822b8e5b in your dom0 kernel debug symbols.

rpm -ql kernel-default-debuginfo | grep -i vmlinux
        /usr/lib/debug/boot/vmlinux-4.12.0-2.gb8e7496-default.debug

addr2line -e /usr/lib/debug/boot/vmlinux-4.12.0-2.gb8e7496-default.debug 
ffffffff822b8e5b
        
/usr/src/debug/kernel-default-4.12.0/linux-4.12/linux-obj/../mm/early_ioremap.c:137

cd /usr/src/linux
cat mm/early_ioremap.c

        ...
        /*
         * Mappings have to be page-aligned
         */
        offset = offset_in_page(phys_addr);
        phys_addr &= PAGE_MASK;
        size = PAGE_ALIGN(last_addr + 1) - phys_addr;

        /*
         * Mappings have to fit in the FIX_BTMAP area.
         */
        nrpages = size >> PAGE_SHIFT;
137     if (WARN_ON(nrpages > NR_FIX_BTMAPS))
                return NULL;

        /*
         * Ok, go for it..
         */
        ...





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