[SRU][jammy:linux][PATCH 0/1] Undefined Behavior Sanitizer (UBSAN) causes failure to match symbols

[John Cabaj]

On 5/18/23 7:02 PM, Dimitri John Ledkov wrote:
> On Thu, 18 May 2023 at 16:56, John Cabaj <john.cabaj at canonical.com> wrote:
>>
>> BugLink: https://bugs.launchpad.net/bugs/2003374
>>
>> [Impact]
>> * When UBSAN is enabled in an s390x kernel configuration, kpatch-build can fail to find matching symbols in the vmlinux symbol table. This was discovered in both Jammy 5.15 and Kinetic 5.19 kernels.
>> * UBSAN was disabled in the Jammy 5.15 s390x kernel configuration to resolve the issue
>> * Upstream kpatch recently resolved the issue via https://github.com/dynup/kpatch/pull/1332/commits/85344cf524cccc7b8e10bf04ed38a0f586bffd10, so this patch re-enables UBSAN for Jammy 5.15 s390x kernel configuration.
> 
> Is that fix already uploaded to all relevant kpatch packages we have
> in various places?

I think that the new version is ready to go, though I'm not certain it's uploaded everywhere yet. Adding Ben for comment.


John 

> 
>>
>> [Fix]
>> * Simple config change
>>
>> [Test Case]
>> * Used kpatch-build v0.9.8 to build and load a fs/proc/meminfo.c Livepatch on s390x kernel successfully
>>
>> [Where problems could occur]
>> * Should not introduce any regressions as functionality was enabled since original Jammy 5.15 kernel until v5.15.0-70.77
>>
>> John Cabaj (1):
>>   UBUNTU: [Config] s390x: Re-adding UBSAN to configuration
>>
>>  debian.master/config/annotations | 26 +++++++++++++-------------
>>  1 file changed, 13 insertions(+), 13 deletions(-)
>>
>> --
>> 2.34.1
>>
>>
>> --
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> 
> 
>