Re: [Bug 216905] New: Kernel won't compile with KASAN

[Robert Dinse <nanook@eskimo.com>]

      Increasing to 2048 did allow kernels to compile with KASAN 
enabled.  I am curious why e-mail only?  It would seem bugzilla, a 
public forum would make this fix available to others who may be 
experiencing the same or related problems.  Interestingly, I could not 
locate the symbol with xconfig, had to hand edit the .config file in 
deference to the fact that it tells you not to.

On 1/9/23 16:09, Andrew Morton wrote:
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
>
> On Mon, 09 Jan 2023 23:42:40 +0000 bugzilla-daemon@kernel.org wrote:
>
>> https://bugzilla.kernel.org/show_bug.cgi?id=216905
>>
>>              Bug ID: 216905
>>             Summary: Kernel won't compile with KASAN
>>             Product: Memory Management
>>             Version: 2.5
>>      Kernel Version: 6.1.4
>>            Hardware: All
>>                  OS: Linux
>>                Tree: Mainline
>>              Status: NEW
>>            Severity: normal
>>            Priority: P1
>>           Component: Other
>>            Assignee: akpm@linux-foundation.org
>>            Reporter: nanook@eskimo.com
>>          Regression: No
>>
>> Created attachment 303563
>>    --> https://bugzilla.kernel.org/attachment.cgi?id=303563&action=edit
>> These are errors when trying to compile KASAN inline
>>
>> Using GCC 12.2, can not compile a kernel with KASAN enabled, either inline or
>> outline.
>> The hardware is an i7-6700k based home brew machine, Asus motherboard.
>> running Ubuntu 22.10 32GB of RAM but using gcc 12.2 rather than the Ubuntu
>> compiler.
> crypto/ecc.c: In function ‘ecc_point_mult_shamir’:
> crypto/ecc.c:1414:1: warning: the frame size of 1168 bytes is larger than 1024 bytes [-Wframe-larger-than=]
>   1414 | }
>        | ^
> lib/crypto/curve25519-hacl64.c: In function ‘ladder_cmult.constprop’:
> lib/crypto/curve25519-hacl64.c:601:1: warning: the frame size of 1376 bytes is larger than 1024 bytes [-Wframe-larger-than=]
>    601 | }
>        | ^
> lib/zstd/common/entropy_common.c: In function ‘HUF_readStats’:
> lib/zstd/common/entropy_common.c:258:1: warning: the frame size of 1088 bytes is larger than 1024 bytes [-Wframe-larger-than=]
>    258 | }
>        | ^
>
> (etcetera)
>
> Increasing CONFIG_FRAME_WARN should fix this.  Try 2048.
>
> Perhaps KASAN could increase it somehow to prevent others from tripping
> over this.