[powerpc] Boot failure kernel BUG at mm/usercopy.c:102

[Sachin Sant]

>> [ 0.445046] Code: 392990f8 48000014 3d02ffe9 390827f0 7d074378 7d094378 7c661b78 3c62ffe7 f9610060 386319f0 4bca6935 60000000 <0fe00000> 00000000 00000000 7c0802a6
>> [ 0.445061] ---[ end trace 0000000000000000 ]—
>> Git bisect points to following patch:
>> commit 317c8194e6aeb8b3b573ad139fc2a0635856498e
>>      rseq: Introduce feature size and alignment ELF auxiliary vector entries
>> Reverting the patch helps boot the kernel.
> 
> Can you try with the following fix ?
> 
> https://lore.kernel.org/r/20230104192054.34046-1-mathieu.desnoyers@efficios.com
> "rseq: Fix: Increase AT_VECTOR_SIZE_BASE to match rseq auxvec entries"
> 

Thanks. Yes, this patch fixes the reported problem.

- Sachin
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