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Bug#978753: usercopy: Kernel memory exposure attempt

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  Bug#978753: usercopy: Kernel memory exposure attempt Salvatore Bonaccorso <carnil@debian.org> - 2020-12-31 14:40 +0100
    Bug#978753: usercopy: Kernel memory exposure attempt Markus Bäcklund <markus.backlund@pp.inet.fi> - 2021-01-07 14:00 +0100

#69007 — Bug#978753: usercopy: Kernel memory exposure attempt

Control: tags -1 + moreinfo

Hi Markus,

Thanks for your report.

On Thu, Dec 31, 2020 at 12:45:47PM +0200, Markus Bäcklund wrote:
> Package: src:linux-image-4.19.0-13-amd64
> Version: 4.19.160-2
> Severity: critical
> Justification: breaks the whole system
> 
> 
> 
> -- Package-specific info:
> ** Kernel log: boot messages should be attached
> 
> 
> -- System Information:
> Debian Release: 10.7
>   APT prefers stable-updates
>   APT policy: (500, 'stable-updates'), (500, 'stable')
> Architecture: amd64 (x86_64)
> 
> Kernel: Linux 5.4.86 (SMP w/4 CPU cores)
> Kernel taint flags: TAINT_UNSIGNED_MODULE

5.4.86 is not a Debian kernel in buster and was tainted. Can you
please provide the kernel logs as well? This might give some better
clue.

Regards,
Salvatore

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#69078

Hi,

I already upgraded my system completely. Kernel version 5.4.86 was 
installed after this error and thus included in the report.

How can I provide kernel log now?


Best regards,

Markus


On 31/12/2020 15.34, Salvatore Bonaccorso wrote:
> Control: tags -1 + moreinfo
>
> Hi Markus,
>
> Thanks for your report.
>
> On Thu, Dec 31, 2020 at 12:45:47PM +0200, Markus Bäcklund wrote:
>> Package: src:linux-image-4.19.0-13-amd64
>> Version: 4.19.160-2
>> Severity: critical
>> Justification: breaks the whole system
>>
>>
>>
>> -- Package-specific info:
>> ** Kernel log: boot messages should be attached
>>
>>
>> -- System Information:
>> Debian Release: 10.7
>>    APT prefers stable-updates
>>    APT policy: (500, 'stable-updates'), (500, 'stable')
>> Architecture: amd64 (x86_64)
>>
>> Kernel: Linux 5.4.86 (SMP w/4 CPU cores)
>> Kernel taint flags: TAINT_UNSIGNED_MODULE
> 5.4.86 is not a Debian kernel in buster and was tainted. Can you
> please provide the kernel logs as well? This might give some better
> clue.
>
> Regards,
> Salvatore

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