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Subjectlinux-next: build failure after merge of the akpm-current tree
Hi Andrew,

After merging the akpm-current tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

In file included from /home/sfr/next/next/include/uapi/linux/uuid.h:21:0,
from /home/sfr/next/next/include/linux/uuid.h:19,
from /home/sfr/next/next/include/linux/mod_devicetable.h:12,
from /home/sfr/next/next/scripts/mod/devicetable-offsets.c:2:
/home/sfr/next/next/include/linux/string.h: In function 'memcpy_and_pad':
/home/sfr/next/next/include/linux/string.h:450:3: error: implicit declaration of function 'fortify_panic' [-Werror=implicit-function-declaration]

Caused by commit

9b04e51112ba ("fortify: use WARN instead of BUG for now")

interacting with commit

01f33c336e2d ("string.h: add memcpy_and_pad()")

from the block tree.

I have applied the following merge fix patch:

From: Stephen Rothwell <>
Date: Thu, 31 Aug 2017 18:13:43 +1000
Subject: [PATCH] fortify: use WARN instead of BUG for now fix

Signed-off-by: Stephen Rothwell <>
include/linux/string.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/string.h b/include/linux/string.h
index edd2b6154b80..e3b713114732 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -447,7 +447,7 @@ __FORTIFY_INLINE void memcpy_and_pad(void *dest, size_t dest_len,
if (dest_size < dest_len)
- fortify_panic(__func__);
+ fortify_overflow(__func__);
if (dest_len > count) {
memcpy(dest, src, count);
memset(dest + count, pad, dest_len - count);
Stephen Rothwell

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