Re: [syzbot] linux-next build error (20)

[Aleksandr Nogikh]

On Sat, Feb 22, 2025 at 10:02 PM syzbot
<syzbot+06fd1a3613c50d36129e@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    d4b0fd87ff0d Add linux-next specific files for 20250221
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=17a5bae4580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=76d7299d72819017
> dashboard link: https://syzkaller.appspot.com/bug?extid=06fd1a3613c50d36129e
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+06fd1a3613c50d36129e@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> <stdin>:4:15: error: use of undeclared identifier '__ref_stack_chk_guard'

Manual bisection pointed to the commits from this patch series:

[PATCH v5 00/16] x86-64: Stack protector and percpu improvements
https://lore.kernel.org/lkml/20241105155801.1779119-1-brgerst@xxxxxxxxx/

Brian, could you please take a look at this syzbot report?

The latest build log (for next-20250318) is here:
https://syzkaller.appspot.com/text?tag=CrashLog&x=10a745e4580000

It failed with the following error:

<stdin>:4:15: error: use of undeclared identifier '__ref_stack_chk_guard'
EXPORT_SYMBOL(__ref_stack_chk_guard);
              ^
1 error generated.
make[4]: *** [scripts/Makefile.build:335: arch/x86/entry/entry.o] Error 1
make[4]: *** Deleting file 'arch/x86/entry/entry.o'
make[4]: *** Waiting for unfinished jobs....

-- 
Aleksandr


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