Re: linux-next: build failure after merge of the akpm tree

From: Kees Cook
Date: Tue Aug 01 2017 - 14:40:43 EST

On Mon, Jul 31, 2017 at 11:25 PM, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> Hi Andrew,
> After merging the akpm tree, today's linux-next build (powerpc
> allyesconfig) failed like this:
> In file included from arch/powerpc/include/asm/paca.h:19:0,
> from arch/powerpc/include/asm/hw_irq.h:42,
> from arch/powerpc/include/asm/irqflags.h:11,
> from include/linux/irqflags.h:15,
> from include/linux/spinlock.h:53,
> from include/linux/wait.h:8,
> from include/linux/wait_bit.h:7,
> from include/linux/fs.h:5,
> from include/linux/buffer_head.h:11,
> from fs/adfs/dir_f.c:12:
> In function 'memcpy',
> inlined from '__adfs_dir_put' at fs/adfs/dir_f.c:318:2,
> inlined from 'adfs_f_update' at fs/adfs/dir_f.c:403:2:
> include/linux/string.h:305:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter
> __read_overflow2();
> ^
> I don't know why this has turned up now. I have just left it broken
> for now and would appreciate any fix.

Thanks for the heads-up! I'm not sure why this suddenly appeared
either, but Arnd has sent a patch for this now.


Kees Cook
Pixel Security