upstream build error (11)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 4d09c1d9 Merge tag 'devicetree-fixes-for-5.10-1' of git://..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1615899c500000
kernel config: https://syzkaller.appspot.com/x/.config?x=a5c844e56cc50cdb
dashboard link: https://syzkaller.appspot.com/bug?extid=5b0d0de84d6c65b8dd2b
compiler: gcc (GCC) 10.1.0-syz 20200507

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+5b0d0d...@syzkaller.appspotmail.com

mm/process_vm_access.c:277:5: error: implicit declaration of function 'in_compat_syscall'; did you mean 'in_ia32_syscall'? [-Werror=implicit-function-declaration]

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[Dmitry Vyukov]

On Wed, Oct 28, 2020 at 9:31 AM syzbot
<syzbot+5b0d0d...@syzkaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 4d09c1d9 Merge tag 'devicetree-fixes-for-5.10-1' of git://..
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1615899c500000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a5c844e56cc50cdb
> dashboard link: https://syzkaller.appspot.com/bug?extid=5b0d0de84d6c65b8dd2b
> compiler: gcc (GCC) 10.1.0-syz 20200507
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+5b0d0d...@syzkaller.appspotmail.com
>
> mm/process_vm_access.c:277:5: error: implicit declaration of function 'in_compat_syscall'; did you mean 'in_ia32_syscall'? [-Werror=implicit-function-declaration]

Other build failures are piling behind this.

#syz fix: mm/process_vm_access: Add missing #include <linux/compat.h>

[Andrew Morton]

For some reason I cant reproduce this with that .config, but presumably
this is the fix?

From: Andrew Morton <ak...@linux-foundation.org>
Subject: mm/process_vm_access.c: include compat.h

mm/process_vm_access.c:277:5: error: implicit declaration of function 'in_compat_syscall'; did you mean 'in_ia32_syscall'? [-Werror=implicit-function-declaration]

Fixes: 38dc5079da7081e "Fix compat regression in process_vm_rw()"
Reported-by: syzbot+5b0d0d...@syzkaller.appspotmail.com
Cc: Kyle Huey <m...@kylehuey.com>
Cc: Jens Axboe <ax...@kernel.dk>
Cc: Al Viro <vi...@zeniv.linux.org.uk>
Cc: Christoph Hellwig <h...@lst.de>
Signed-off-by: Andrew Morton <ak...@linux-foundation.org>
---

mm/process_vm_access.c | 1 +
1 file changed, 1 insertion(+)

--- a/mm/process_vm_access.c~a
+++ a/mm/process_vm_access.c
@@ -9,6 +9,7 @@
#include <linux/mm.h>
#include <linux/uio.h>
#include <linux/sched.h>
+#include <linux/compat.h>
#include <linux/sched/mm.h>
#include <linux/highmem.h>
#include <linux/ptrace.h>
_

[Dmitry Vyukov]

On Sat, Jan 9, 2021 at 11:34 PM Andrew Morton <ak...@linux-foundation.org> wrote:
>
> On Sat, 9 Jan 2021 21:41:23 +0100 Dmitry Vyukov <dvy...@google.com> wrote:
>
> > On Wed, Oct 28, 2020 at 9:31 AM syzbot
> > <syzbot+5b0d0d...@syzkaller.appspotmail.com> wrote:
> > >
> > > Hello,
> > >
> > > syzbot found the following issue on:
> > >
> > > HEAD commit: 4d09c1d9 Merge tag 'devicetree-fixes-for-5.10-1' of git://..
> > > git tree: upstream
> > > console output: https://syzkaller.appspot.com/x/log.txt?x=1615899c500000
> > > kernel config: https://syzkaller.appspot.com/x/.config?x=a5c844e56cc50cdb
> > > dashboard link: https://syzkaller.appspot.com/bug?extid=5b0d0de84d6c65b8dd2b
> > > compiler: gcc (GCC) 10.1.0-syz 20200507
> > >
> > > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > > Reported-by: syzbot+5b0d0d...@syzkaller.appspotmail.com
> > >
> > > mm/process_vm_access.c:277:5: error: implicit declaration of function 'in_compat_syscall'; did you mean 'in_ia32_syscall'? [-Werror=implicit-function-declaration]
> >
> > Other build failures are piling behind this.
> >
> > #syz fix: mm/process_vm_access: Add missing #include <linux/compat.h>

/\/\/\/\/\/\/\/\

This was already fixed by this commit:
https://www.spinics.net/lists/linux-mm/msg232500.html

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