[syzbot] upstream build error (18)

[syzbot] upstream build error (18)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    7e284070abe5 Merge tag 'for-5.19/dm-changes' of git://git...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1233ae81f00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=854cea6cbaeb1d1b
dashboard link: https://syzkaller.appspot.com/bug?extid=a0b95614aef2afe9e488
compiler:       aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a0b95614aef2afe9e488@syzkaller.appspotmail.com

arch/arm64/mm/hugetlbpage.c:515:9: error: implicit declaration of function 'get_clear_flush'; did you mean 'ptep_clear_flush'? [-Werror=implicit-function-declaration]
arch/arm64/mm/hugetlbpage.c:515:9: error: incompatible types when returning type 'int' but 'pte_t' was expected
arch/arm64/mm/hugetlbpage.c:516:1: error: control reaches end of non-void function [-Werror=return-type]

---
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See https://goo.gl/tpsmEJ for more information about syzbot.
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Re: [syzbot] upstream build error (18)

[Baolin Wang]

Hi,

On 5/27/2022 3:14 PM, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    7e284070abe5 Merge tag 'for-5.19/dm-changes' of git://git...
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1233ae81f00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=854cea6cbaeb1d1b
> dashboard link: https://syzkaller.appspot.com/bug?extid=a0b95614aef2afe9e488
> compiler:       aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> userspace arch: arm64
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+a0b95614aef2afe9e488@syzkaller.appspotmail.com
> 
> arch/arm64/mm/hugetlbpage.c:515:9: error: implicit declaration of function 'get_clear_flush'; did you mean 'ptep_clear_flush'? [-Werror=implicit-function-declaration]
> arch/arm64/mm/hugetlbpage.c:515:9: error: incompatible types when returning type 'int' but 'pte_t' was expected
> arch/arm64/mm/hugetlbpage.c:516:1: error: control reaches end of non-void function [-Werror=return-type]

I've sent out a fix patch [1], please try it. Thanks.

[1] 
https://lore.kernel.org/all/814e20c19b110209ee12ecae7cb05f8a78d021c8.1653625820.git.baolin.wang@linux.alibaba.com/

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Re: [syzbot] upstream build error (18)

[Dmitry Vyukov]

On Fri, 27 May 2022 at 10:24, Baolin Wang <baolin.wang@linux.alibaba.com> wrote:
>
> Hi,
>
> On 5/27/2022 3:14 PM, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    7e284070abe5 Merge tag 'for-5.19/dm-changes' of git://git...
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=1233ae81f00000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=854cea6cbaeb1d1b
> > dashboard link: https://syzkaller.appspot.com/bug?extid=a0b95614aef2afe9e488
> > compiler:       aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> > userspace arch: arm64
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+a0b95614aef2afe9e488@syzkaller.appspotmail.com
> >
> > arch/arm64/mm/hugetlbpage.c:515:9: error: implicit declaration of function 'get_clear_flush'; did you mean 'ptep_clear_flush'? [-Werror=implicit-function-declaration]
> > arch/arm64/mm/hugetlbpage.c:515:9: error: incompatible types when returning type 'int' but 'pte_t' was expected
> > arch/arm64/mm/hugetlbpage.c:516:1: error: control reaches end of non-void function [-Werror=return-type]
>
> I've sent out a fix patch [1], please try it. Thanks.
>
> [1]
> https://lore.kernel.org/all/814e20c19b110209ee12ecae7cb05f8a78d021c8.1653625820.git.baolin.wang@linux.alibaba.com/

Let's tell syzbot about the fix:

#syz fix: arm64/hugetlb: Fix building errors in huge_ptep_clear_flush()

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